/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 16:01:32,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 16:01:32,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 16:01:32,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 16:01:33,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 16:01:33,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 16:01:33,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 16:01:33,005 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-Separate.epf [2021-06-05 16:01:33,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 16:01:33,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 16:01:33,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 16:01:33,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 16:01:33,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 16:01:33,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 16:01:33,036 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 16:01:33,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 16:01:33,036 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 16:01:33,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 16:01:33,037 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 16:01:33,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 16:01:33,038 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 16:01:33,038 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 16:01:33,038 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 16:01:33,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 16:01:33,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 16:01:33,038 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 16:01:33,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 16:01:33,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 16:01:33,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 16:01:33,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 16:01:33,039 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 16:01:33,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 16:01:33,039 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 16:01:33,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 16:01:33,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 16:01:33,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 16:01:33,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 16:01:33,300 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 16:01:33,302 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 16:01:33,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl [2021-06-05 16:01:33,303 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/dot-product-alt.wvr.bpl' [2021-06-05 16:01:33,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 16:01:33,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 16:01:33,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 16:01:33,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 16:01:33,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 16:01:33,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 16:01:33,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 16:01:33,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 16:01:33,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 16:01:33,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/1) ... [2021-06-05 16:01:33,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 16:01:33,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 16:01:33,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 16:01:33,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 16:01:33,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (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 [2021-06-05 16:01:33,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 16:01:33,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 16:01:33,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 16:01:33,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 16:01:33,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 16:01:33,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 16:01:33,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 16:01:33,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 16:01:33,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 16:01:33,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 16:01:33,436 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 16:01:33,436 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 16:01:33,437 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 16:01:33,623 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 16:01:33,623 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 16:01:33,624 INFO L202 PluginConnector]: Adding new model dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:01:33 BoogieIcfgContainer [2021-06-05 16:01:33,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 16:01:33,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 16:01:33,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 16:01:33,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 16:01:33,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:01:33" (1/2) ... [2021-06-05 16:01:33,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c2fec62 and model type dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:01:33, skipping insertion in model container [2021-06-05 16:01:33,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:01:33" (2/2) ... [2021-06-05 16:01:33,629 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-alt.wvr.bpl [2021-06-05 16:01:33,633 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 16:01:33,633 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 16:01:33,633 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 16:01:33,633 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 16:01:33,658 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 16:01:33,672 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 16:01:33,684 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 16:01:33,684 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 16:01:33,684 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 16:01:33,685 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 16:01:33,685 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 16:01:33,685 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 16:01:33,691 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 16:01:33,691 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 16:01:33,697 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-06-05 16:01:33,732 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 16:01:33,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:33,745 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:33,745 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:33,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash 761048342, now seen corresponding path program 1 times [2021-06-05 16:01:33,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:33,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172866755] [2021-06-05 16:01:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:33,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:33,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172866755] [2021-06-05 16:01:33,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172866755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:01:33,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:01:33,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 16:01:33,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959658604] [2021-06-05 16:01:33,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 16:01:33,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 16:01:33,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:01:33,875 INFO L87 Difference]: Start difference. First operand has 195 states, 193 states have (on average 2.8756476683937824) internal successors, (555), 194 states have internal predecessors, (555), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:33,909 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2021-06-05 16:01:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 16:01:33,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-06-05 16:01:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:33,924 INFO L225 Difference]: With dead ends: 298 [2021-06-05 16:01:33,925 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 16:01:33,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 16:01:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 16:01:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2021-06-05 16:01:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2021-06-05 16:01:33,986 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2021-06-05 16:01:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:33,989 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2021-06-05 16:01:33,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2021-06-05 16:01:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:01:33,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:33,996 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:33,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 16:01:33,996 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:33,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1631630015, now seen corresponding path program 1 times [2021-06-05 16:01:33,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:33,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266896394] [2021-06-05 16:01:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:34,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:34,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266896394] [2021-06-05 16:01:34,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266896394] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:01:34,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:01:34,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:01:34,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152828711] [2021-06-05 16:01:34,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 16:01:34,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:34,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 16:01:34,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 16:01:34,081 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:34,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:34,130 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2021-06-05 16:01:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 16:01:34,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-06-05 16:01:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:34,139 INFO L225 Difference]: With dead ends: 249 [2021-06-05 16:01:34,139 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 16:01:34,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:01:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 16:01:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2021-06-05 16:01:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2021-06-05 16:01:34,160 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2021-06-05 16:01:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:34,161 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2021-06-05 16:01:34,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2021-06-05 16:01:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 16:01:34,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:34,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:01:34,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 16:01:34,162 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 691559827, now seen corresponding path program 1 times [2021-06-05 16:01:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:34,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330914308] [2021-06-05 16:01:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:34,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330914308] [2021-06-05 16:01:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330914308] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 16:01:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 16:01:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 16:01:34,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705791615] [2021-06-05 16:01:34,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 16:01:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:34,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 16:01:34,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 16:01:34,238 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:34,287 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2021-06-05 16:01:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 16:01:34,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-06-05 16:01:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:34,292 INFO L225 Difference]: With dead ends: 332 [2021-06-05 16:01:34,293 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 16:01:34,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 16:01:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 16:01:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2021-06-05 16:01:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2021-06-05 16:01:34,308 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2021-06-05 16:01:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:34,309 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2021-06-05 16:01:34,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2021-06-05 16:01:34,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:01:34,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:34,310 INFO L521 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] [2021-06-05 16:01:34,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 16:01:34,310 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash -312129144, now seen corresponding path program 1 times [2021-06-05 16:01:34,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:34,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326640342] [2021-06-05 16:01:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:34,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:34,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326640342] [2021-06-05 16:01:34,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326640342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164071572] [2021-06-05 16:01:34,727 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 [2021-06-05 16:01:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:01:34,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:34,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:34,999 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 16:01:35,003 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:35,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:35,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:01:35,016 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 16:01:35,020 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:35,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:35,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-06-05 16:01:35,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:35,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:35,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:35,037 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-05 16:01:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:35,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164071572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:35,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:35,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 16:01:35,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051019057] [2021-06-05 16:01:35,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 16:01:35,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:35,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 16:01:35,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 16:01:35,082 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:35,318 INFO L93 Difference]: Finished difference Result 426 states and 1215 transitions. [2021-06-05 16:01:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 16:01:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-06-05 16:01:35,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:35,321 INFO L225 Difference]: With dead ends: 426 [2021-06-05 16:01:35,321 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 16:01:35,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:01:35,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 16:01:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 346. [2021-06-05 16:01:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2021-06-05 16:01:35,334 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2021-06-05 16:01:35,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:35,334 INFO L482 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2021-06-05 16:01:35,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2021-06-05 16:01:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:01:35,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:35,336 INFO L521 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] [2021-06-05 16:01:35,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:35,552 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:35,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:35,553 INFO L82 PathProgramCache]: Analyzing trace with hash -611353494, now seen corresponding path program 2 times [2021-06-05 16:01:35,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:35,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103478533] [2021-06-05 16:01:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:35,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:35,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103478533] [2021-06-05 16:01:35,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103478533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:35,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062305156] [2021-06-05 16:01:35,764 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 [2021-06-05 16:01:35,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:35,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:35,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 16:01:35,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:35,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:35,993 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 23 treesize of output 27 [2021-06-05 16:01:36,028 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:36,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,044 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 19 treesize of output 23 [2021-06-05 16:01:36,077 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:36,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-05 16:01:36,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:36,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:36,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:36,162 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-06-05 16:01:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:36,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062305156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:36,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:36,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 16:01:36,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451166474] [2021-06-05 16:01:36,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:01:36,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:01:36,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:01:36,255 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:36,857 INFO L93 Difference]: Finished difference Result 616 states and 1755 transitions. [2021-06-05 16:01:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:01:36,857 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-06-05 16:01:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:36,860 INFO L225 Difference]: With dead ends: 616 [2021-06-05 16:01:36,860 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 16:01:36,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 16:01:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 368. [2021-06-05 16:01:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.915531335149864) internal successors, (1070), 367 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1070 transitions. [2021-06-05 16:01:36,870 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1070 transitions. Word has length 24 [2021-06-05 16:01:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:36,870 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1070 transitions. [2021-06-05 16:01:36,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1070 transitions. [2021-06-05 16:01:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:01:36,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:36,871 INFO L521 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] [2021-06-05 16:01:37,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:37,075 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1585830426, now seen corresponding path program 3 times [2021-06-05 16:01:37,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:37,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045517025] [2021-06-05 16:01:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:37,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:37,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:37,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045517025] [2021-06-05 16:01:37,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045517025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:37,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068681651] [2021-06-05 16:01:37,376 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 [2021-06-05 16:01:37,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:01:37,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:01:37,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:37,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:37,517 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 23 treesize of output 27 [2021-06-05 16:01:37,545 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:37,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:37,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:37,559 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 19 treesize of output 23 [2021-06-05 16:01:37,586 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:37,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:37,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:37,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-06-05 16:01:37,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:37,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:37,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:37,632 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:29, output treesize:15 [2021-06-05 16:01:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:37,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068681651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:37,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:37,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2021-06-05 16:01:37,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763827487] [2021-06-05 16:01:37,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 16:01:37,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:37,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 16:01:37,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 16:01:37,693 INFO L87 Difference]: Start difference. First operand 368 states and 1070 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:38,170 INFO L93 Difference]: Finished difference Result 717 states and 2081 transitions. [2021-06-05 16:01:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 16:01:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-06-05 16:01:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:38,175 INFO L225 Difference]: With dead ends: 717 [2021-06-05 16:01:38,175 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 16:01:38,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:01:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 16:01:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 366. [2021-06-05 16:01:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.9342465753424656) internal successors, (1071), 365 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:38,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1071 transitions. [2021-06-05 16:01:38,184 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1071 transitions. Word has length 24 [2021-06-05 16:01:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:38,184 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 1071 transitions. [2021-06-05 16:01:38,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:38,185 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1071 transitions. [2021-06-05 16:01:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:01:38,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:38,185 INFO L521 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] [2021-06-05 16:01:38,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 16:01:38,395 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:38,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:38,396 INFO L82 PathProgramCache]: Analyzing trace with hash 416827498, now seen corresponding path program 4 times [2021-06-05 16:01:38,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:38,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710291858] [2021-06-05 16:01:38,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:38,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:38,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710291858] [2021-06-05 16:01:38,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710291858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:38,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567584232] [2021-06-05 16:01:38,516 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 [2021-06-05 16:01:38,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:38,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:01:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:38,637 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 23 treesize of output 19 [2021-06-05 16:01:38,639 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:38,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:38,645 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 19 treesize of output 15 [2021-06-05 16:01:38,648 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:38,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:38,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-06-05 16:01:38,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:01:38,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:38,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:38,661 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-06-05 16:01:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:38,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567584232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:38,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:38,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 16:01:38,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255949415] [2021-06-05 16:01:38,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:01:38,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:38,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:01:38,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:01:38,682 INFO L87 Difference]: Start difference. First operand 366 states and 1071 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:38,882 INFO L93 Difference]: Finished difference Result 558 states and 1607 transitions. [2021-06-05 16:01:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 16:01:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-06-05 16:01:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:38,885 INFO L225 Difference]: With dead ends: 558 [2021-06-05 16:01:38,885 INFO L226 Difference]: Without dead ends: 543 [2021-06-05 16:01:38,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:01:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-06-05 16:01:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 382. [2021-06-05 16:01:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.916010498687664) internal successors, (1111), 381 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1111 transitions. [2021-06-05 16:01:38,893 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1111 transitions. Word has length 24 [2021-06-05 16:01:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:38,894 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1111 transitions. [2021-06-05 16:01:38,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1111 transitions. [2021-06-05 16:01:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 16:01:38,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:38,895 INFO L521 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] [2021-06-05 16:01:39,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:39,115 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:39,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:39,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2079136470, now seen corresponding path program 5 times [2021-06-05 16:01:39,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:39,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761201115] [2021-06-05 16:01:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:39,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:39,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761201115] [2021-06-05 16:01:39,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761201115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:39,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703391513] [2021-06-05 16:01:39,293 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 [2021-06-05 16:01:39,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:39,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:39,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 16:01:39,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:39,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:39,425 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 27 treesize of output 31 [2021-06-05 16:01:39,448 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:39,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:39,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:39,464 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 23 treesize of output 27 [2021-06-05 16:01:39,485 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:01:39,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:39,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:39,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-06-05 16:01:39,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:01:39,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:01:39,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:01:39,548 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:36, output treesize:45 [2021-06-05 16:01:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:39,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703391513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:39,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:39,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 16:01:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900806473] [2021-06-05 16:01:39,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 16:01:39,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:39,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 16:01:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 16:01:39,638 INFO L87 Difference]: Start difference. First operand 382 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:39,978 INFO L93 Difference]: Finished difference Result 681 states and 1985 transitions. [2021-06-05 16:01:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 16:01:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2021-06-05 16:01:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:39,981 INFO L225 Difference]: With dead ends: 681 [2021-06-05 16:01:39,981 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 16:01:39,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:39,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 16:01:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 390. [2021-06-05 16:01:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.9383033419023135) internal successors, (1143), 389 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1143 transitions. [2021-06-05 16:01:39,990 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1143 transitions. Word has length 24 [2021-06-05 16:01:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:39,990 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 1143 transitions. [2021-06-05 16:01:39,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1143 transitions. [2021-06-05 16:01:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:39,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:39,991 INFO L521 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] [2021-06-05 16:01:40,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 16:01:40,207 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:40,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:40,208 INFO L82 PathProgramCache]: Analyzing trace with hash 504651029, now seen corresponding path program 6 times [2021-06-05 16:01:40,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:40,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782002532] [2021-06-05 16:01:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:40,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:40,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782002532] [2021-06-05 16:01:40,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782002532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:40,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084930077] [2021-06-05 16:01:40,248 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 [2021-06-05 16:01:40,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:01:40,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:40,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:40,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:40,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084930077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:40,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:40,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:01:40,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091252801] [2021-06-05 16:01:40,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:01:40,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:01:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:01:40,357 INFO L87 Difference]: Start difference. First operand 390 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:40,721 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2021-06-05 16:01:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:01:40,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-06-05 16:01:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:40,725 INFO L225 Difference]: With dead ends: 1186 [2021-06-05 16:01:40,725 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 16:01:40,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:01:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 16:01:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 509. [2021-06-05 16:01:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0688976377952755) internal successors, (1559), 508 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1559 transitions. [2021-06-05 16:01:40,738 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1559 transitions. Word has length 27 [2021-06-05 16:01:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:40,738 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1559 transitions. [2021-06-05 16:01:40,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1559 transitions. [2021-06-05 16:01:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:40,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:40,739 INFO L521 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] [2021-06-05 16:01:40,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:40,953 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 993171717, now seen corresponding path program 7 times [2021-06-05 16:01:40,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311034550] [2021-06-05 16:01:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:40,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:40,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311034550] [2021-06-05 16:01:40,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311034550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:40,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761379125] [2021-06-05 16:01:40,998 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 [2021-06-05 16:01:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:41,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:41,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:41,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:41,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761379125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:41,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:41,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:41,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731234904] [2021-06-05 16:01:41,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:41,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:41,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:41,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:41,134 INFO L87 Difference]: Start difference. First operand 509 states and 1559 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:41,939 INFO L93 Difference]: Finished difference Result 2025 states and 5753 transitions. [2021-06-05 16:01:41,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:01:41,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:41,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:41,952 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 16:01:41,952 INFO L226 Difference]: Without dead ends: 2025 [2021-06-05 16:01:41,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:01:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-05 16:01:41,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 515. [2021-06-05 16:01:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.0914396887159534) internal successors, (1589), 514 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:41,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1589 transitions. [2021-06-05 16:01:41,969 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1589 transitions. Word has length 27 [2021-06-05 16:01:41,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:41,969 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1589 transitions. [2021-06-05 16:01:41,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:41,969 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1589 transitions. [2021-06-05 16:01:41,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:41,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:41,970 INFO L521 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] [2021-06-05 16:01:42,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 16:01:42,181 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash 799271049, now seen corresponding path program 8 times [2021-06-05 16:01:42,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:42,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555750019] [2021-06-05 16:01:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:42,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:42,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555750019] [2021-06-05 16:01:42,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555750019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:42,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034202303] [2021-06-05 16:01:42,227 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 [2021-06-05 16:01:42,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:42,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:42,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:42,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:42,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034202303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:42,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:42,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:42,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244669780] [2021-06-05 16:01:42,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:42,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:42,345 INFO L87 Difference]: Start difference. First operand 515 states and 1589 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:43,035 INFO L93 Difference]: Finished difference Result 1842 states and 5297 transitions. [2021-06-05 16:01:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:01:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:43,042 INFO L225 Difference]: With dead ends: 1842 [2021-06-05 16:01:43,042 INFO L226 Difference]: Without dead ends: 1842 [2021-06-05 16:01:43,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 16:01:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-06-05 16:01:43,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 505. [2021-06-05 16:01:43,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.0734126984126986) internal successors, (1549), 504 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1549 transitions. [2021-06-05 16:01:43,057 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1549 transitions. Word has length 27 [2021-06-05 16:01:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:43,057 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1549 transitions. [2021-06-05 16:01:43,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1549 transitions. [2021-06-05 16:01:43,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:43,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:43,058 INFO L521 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] [2021-06-05 16:01:43,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 16:01:43,265 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 477674582, now seen corresponding path program 1 times [2021-06-05 16:01:43,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:43,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532217691] [2021-06-05 16:01:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:43,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532217691] [2021-06-05 16:01:43,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532217691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:43,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883948262] [2021-06-05 16:01:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:01:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:43,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883948262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:43,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:43,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:01:43,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649446435] [2021-06-05 16:01:43,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:01:43,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:43,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:01:43,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:01:43,379 INFO L87 Difference]: Start difference. First operand 505 states and 1549 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:43,500 INFO L93 Difference]: Finished difference Result 1215 states and 3591 transitions. [2021-06-05 16:01:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:01:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-06-05 16:01:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:43,504 INFO L225 Difference]: With dead ends: 1215 [2021-06-05 16:01:43,504 INFO L226 Difference]: Without dead ends: 1209 [2021-06-05 16:01:43,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-06-05 16:01:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 784. [2021-06-05 16:01:43,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.177522349936143) internal successors, (2488), 783 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2488 transitions. [2021-06-05 16:01:43,520 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2488 transitions. Word has length 27 [2021-06-05 16:01:43,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:43,520 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2488 transitions. [2021-06-05 16:01:43,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2488 transitions. [2021-06-05 16:01:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:43,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:43,521 INFO L521 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] [2021-06-05 16:01:43,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 16:01:43,737 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:43,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1397625825, now seen corresponding path program 9 times [2021-06-05 16:01:43,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:43,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126943517] [2021-06-05 16:01:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:43,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:43,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126943517] [2021-06-05 16:01:43,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126943517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:43,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370298307] [2021-06-05 16:01:43,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:43,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:01:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:43,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370298307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:43,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:43,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:01:43,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883061934] [2021-06-05 16:01:43,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:43,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:43,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:43,894 INFO L87 Difference]: Start difference. First operand 784 states and 2488 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:44,057 INFO L93 Difference]: Finished difference Result 1375 states and 4197 transitions. [2021-06-05 16:01:44,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 16:01:44,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:44,062 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 16:01:44,062 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 16:01:44,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:01:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 16:01:44,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 987. [2021-06-05 16:01:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.186612576064909) internal successors, (3142), 986 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3142 transitions. [2021-06-05 16:01:44,079 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3142 transitions. Word has length 27 [2021-06-05 16:01:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:44,079 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 3142 transitions. [2021-06-05 16:01:44,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3142 transitions. [2021-06-05 16:01:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:44,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:44,081 INFO L521 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] [2021-06-05 16:01:44,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:44,297 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash -485100394, now seen corresponding path program 2 times [2021-06-05 16:01:44,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:44,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626287365] [2021-06-05 16:01:44,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:44,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:44,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626287365] [2021-06-05 16:01:44,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626287365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:44,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158664149] [2021-06-05 16:01:44,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:44,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:44,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:44,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:01:44,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:44,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158664149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:44,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:44,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:01:44,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757611621] [2021-06-05 16:01:44,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:01:44,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:44,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:01:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:01:44,400 INFO L87 Difference]: Start difference. First operand 987 states and 3142 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 16:01:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:44,517 INFO L93 Difference]: Finished difference Result 1478 states and 4418 transitions. [2021-06-05 16:01:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 16:01:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 27 [2021-06-05 16:01:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:44,522 INFO L225 Difference]: With dead ends: 1478 [2021-06-05 16:01:44,522 INFO L226 Difference]: Without dead ends: 1478 [2021-06-05 16:01:44,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:44,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2021-06-05 16:01:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1006. [2021-06-05 16:01:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 1005 states have (on average 3.1502487562189057) internal successors, (3166), 1005 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:44,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 3166 transitions. [2021-06-05 16:01:44,542 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 3166 transitions. Word has length 27 [2021-06-05 16:01:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:44,542 INFO L482 AbstractCegarLoop]: Abstraction has 1006 states and 3166 transitions. [2021-06-05 16:01:44,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 16:01:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 3166 transitions. [2021-06-05 16:01:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:44,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:44,544 INFO L521 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] [2021-06-05 16:01:44,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 16:01:44,757 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash -322791177, now seen corresponding path program 10 times [2021-06-05 16:01:44,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:44,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594624860] [2021-06-05 16:01:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:44,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594624860] [2021-06-05 16:01:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594624860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652581508] [2021-06-05 16:01:44,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:01:44,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:44,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:44,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652581508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:44,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:44,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:01:44,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43861527] [2021-06-05 16:01:44,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:01:44,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:44,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:01:44,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:01:44,882 INFO L87 Difference]: Start difference. First operand 1006 states and 3166 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 16:01:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:45,158 INFO L93 Difference]: Finished difference Result 2277 states and 6674 transitions. [2021-06-05 16:01:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:01:45,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 16:01:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:45,165 INFO L225 Difference]: With dead ends: 2277 [2021-06-05 16:01:45,165 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 16:01:45,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 16:01:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1022. [2021-06-05 16:01:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 3.147894221351616) internal successors, (3214), 1021 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3214 transitions. [2021-06-05 16:01:45,189 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3214 transitions. Word has length 27 [2021-06-05 16:01:45,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:45,189 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 3214 transitions. [2021-06-05 16:01:45,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 16:01:45,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3214 transitions. [2021-06-05 16:01:45,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:45,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:45,191 INFO L521 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] [2021-06-05 16:01:45,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:45,405 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -410515549, now seen corresponding path program 11 times [2021-06-05 16:01:45,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:45,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023033256] [2021-06-05 16:01:45,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:45,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:45,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:45,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023033256] [2021-06-05 16:01:45,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023033256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:45,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834607944] [2021-06-05 16:01:45,438 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 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 [2021-06-05 16:01:45,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:01:45,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:45,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834607944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:45,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:45,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:01:45,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914942833] [2021-06-05 16:01:45,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:01:45,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:45,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:01:45,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:01:45,537 INFO L87 Difference]: Start difference. First operand 1022 states and 3214 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 16:01:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:45,962 INFO L93 Difference]: Finished difference Result 2725 states and 7832 transitions. [2021-06-05 16:01:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 16:01:45,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 16:01:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:45,971 INFO L225 Difference]: With dead ends: 2725 [2021-06-05 16:01:45,971 INFO L226 Difference]: Without dead ends: 2725 [2021-06-05 16:01:45,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 225.4ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:01:45,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2021-06-05 16:01:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1096. [2021-06-05 16:01:45,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.1406392694063925) internal successors, (3439), 1095 states have internal predecessors, (3439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:45,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3439 transitions. [2021-06-05 16:01:45,997 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3439 transitions. Word has length 27 [2021-06-05 16:01:45,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:45,997 INFO L482 AbstractCegarLoop]: Abstraction has 1096 states and 3439 transitions. [2021-06-05 16:01:45,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 16:01:45,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3439 transitions. [2021-06-05 16:01:45,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:45,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:45,999 INFO L521 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] [2021-06-05 16:01:46,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 16:01:46,209 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash -737845825, now seen corresponding path program 12 times [2021-06-05 16:01:46,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:46,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442704031] [2021-06-05 16:01:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:46,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:46,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442704031] [2021-06-05 16:01:46,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442704031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:46,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650781841] [2021-06-05 16:01:46,240 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 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 [2021-06-05 16:01:46,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 16:01:46,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:46,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650781841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:46,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:46,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:01:46,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339371673] [2021-06-05 16:01:46,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:46,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:46,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:46,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:46,368 INFO L87 Difference]: Start difference. First operand 1096 states and 3439 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:46,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:46,590 INFO L93 Difference]: Finished difference Result 2457 states and 7416 transitions. [2021-06-05 16:01:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:01:46,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:46,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:46,596 INFO L225 Difference]: With dead ends: 2457 [2021-06-05 16:01:46,596 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 16:01:46,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 16:01:46,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1570. [2021-06-05 16:01:46,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.1963033779477374) internal successors, (5015), 1569 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5015 transitions. [2021-06-05 16:01:46,625 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5015 transitions. Word has length 27 [2021-06-05 16:01:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:46,625 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 5015 transitions. [2021-06-05 16:01:46,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5015 transitions. [2021-06-05 16:01:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:46,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:46,628 INFO L521 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] [2021-06-05 16:01:46,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:46,841 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:46,841 INFO L82 PathProgramCache]: Analyzing trace with hash 211451865, now seen corresponding path program 13 times [2021-06-05 16:01:46,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:46,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969637314] [2021-06-05 16:01:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:46,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969637314] [2021-06-05 16:01:46,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969637314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669352577] [2021-06-05 16:01:46,869 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 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 [2021-06-05 16:01:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:46,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:46,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:46,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669352577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:46,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:46,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 16:01:46,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290140848] [2021-06-05 16:01:46,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:46,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:46,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:46,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:46,961 INFO L87 Difference]: Start difference. First operand 1570 states and 5015 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:47,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:47,241 INFO L93 Difference]: Finished difference Result 2556 states and 7763 transitions. [2021-06-05 16:01:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 16:01:47,241 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-06-05 16:01:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:47,250 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 16:01:47,250 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 16:01:47,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:01:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 16:01:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1576. [2021-06-05 16:01:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.1885714285714286) internal successors, (5022), 1575 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5022 transitions. [2021-06-05 16:01:47,283 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5022 transitions. Word has length 27 [2021-06-05 16:01:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:47,283 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5022 transitions. [2021-06-05 16:01:47,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:47,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5022 transitions. [2021-06-05 16:01:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:47,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:47,286 INFO L521 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] [2021-06-05 16:01:47,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 16:01:47,501 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1960446489, now seen corresponding path program 14 times [2021-06-05 16:01:47,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:47,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253515762] [2021-06-05 16:01:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:47,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:47,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253515762] [2021-06-05 16:01:47,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253515762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:47,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388748333] [2021-06-05 16:01:47,540 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 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 [2021-06-05 16:01:47,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:47,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388748333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:47,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:47,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:01:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931681574] [2021-06-05 16:01:47,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:01:47,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:01:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:01:47,636 INFO L87 Difference]: Start difference. First operand 1576 states and 5022 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 16:01:47,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:47,993 INFO L93 Difference]: Finished difference Result 3074 states and 9276 transitions. [2021-06-05 16:01:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 16:01:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 27 [2021-06-05 16:01:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:47,998 INFO L225 Difference]: With dead ends: 3074 [2021-06-05 16:01:47,998 INFO L226 Difference]: Without dead ends: 3070 [2021-06-05 16:01:47,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:01:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2021-06-05 16:01:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1588. [2021-06-05 16:01:48,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.178323881537492) internal successors, (5044), 1587 states have internal predecessors, (5044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5044 transitions. [2021-06-05 16:01:48,038 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5044 transitions. Word has length 27 [2021-06-05 16:01:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:48,039 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5044 transitions. [2021-06-05 16:01:48,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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) [2021-06-05 16:01:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5044 transitions. [2021-06-05 16:01:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:48,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:48,041 INFO L521 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] [2021-06-05 16:01:48,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:48,249 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash 104759463, now seen corresponding path program 15 times [2021-06-05 16:01:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:48,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364297168] [2021-06-05 16:01:48,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:48,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364297168] [2021-06-05 16:01:48,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364297168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557565538] [2021-06-05 16:01:48,282 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 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 [2021-06-05 16:01:48,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:01:48,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:48,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:48,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:48,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:48,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557565538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:48,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:48,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:48,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377331829] [2021-06-05 16:01:48,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:48,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:48,383 INFO L87 Difference]: Start difference. First operand 1588 states and 5044 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:49,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:49,208 INFO L93 Difference]: Finished difference Result 5541 states and 16712 transitions. [2021-06-05 16:01:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:01:49,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:49,219 INFO L225 Difference]: With dead ends: 5541 [2021-06-05 16:01:49,220 INFO L226 Difference]: Without dead ends: 5541 [2021-06-05 16:01:49,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:01:49,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2021-06-05 16:01:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 1799. [2021-06-05 16:01:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1798 states have (on average 3.274193548387097) internal successors, (5887), 1798 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 5887 transitions. [2021-06-05 16:01:49,279 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 5887 transitions. Word has length 27 [2021-06-05 16:01:49,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:49,279 INFO L482 AbstractCegarLoop]: Abstraction has 1799 states and 5887 transitions. [2021-06-05 16:01:49,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 5887 transitions. [2021-06-05 16:01:49,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:49,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:49,282 INFO L521 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] [2021-06-05 16:01:49,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 16:01:49,497 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:49,497 INFO L82 PathProgramCache]: Analyzing trace with hash -89141205, now seen corresponding path program 16 times [2021-06-05 16:01:49,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:49,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650274250] [2021-06-05 16:01:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:49,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:49,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650274250] [2021-06-05 16:01:49,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650274250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:49,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137358376] [2021-06-05 16:01:49,534 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 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 [2021-06-05 16:01:49,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:49,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:49,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:49,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137358376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:49,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:49,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:49,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518109879] [2021-06-05 16:01:49,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:49,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:49,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:49,638 INFO L87 Difference]: Start difference. First operand 1799 states and 5887 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:50,403 INFO L93 Difference]: Finished difference Result 5525 states and 16688 transitions. [2021-06-05 16:01:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:01:50,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:50,413 INFO L225 Difference]: With dead ends: 5525 [2021-06-05 16:01:50,414 INFO L226 Difference]: Without dead ends: 5525 [2021-06-05 16:01:50,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 16:01:50,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5525 states. [2021-06-05 16:01:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5525 to 1784. [2021-06-05 16:01:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.259113853056646) internal successors, (5811), 1783 states have internal predecessors, (5811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 5811 transitions. [2021-06-05 16:01:50,480 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 5811 transitions. Word has length 27 [2021-06-05 16:01:50,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:50,480 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 5811 transitions. [2021-06-05 16:01:50,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:50,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 5811 transitions. [2021-06-05 16:01:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:50,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:50,484 INFO L521 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] [2021-06-05 16:01:50,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 16:01:50,700 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:50,701 INFO L82 PathProgramCache]: Analyzing trace with hash -461050971, now seen corresponding path program 17 times [2021-06-05 16:01:50,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:50,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051512961] [2021-06-05 16:01:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:50,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:50,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051512961] [2021-06-05 16:01:50,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051512961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:50,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349504052] [2021-06-05 16:01:50,732 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:01:50,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:01:50,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:50,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:50,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349504052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:50,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:50,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:01:50,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346482403] [2021-06-05 16:01:50,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:01:50,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:50,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:01:50,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:01:50,833 INFO L87 Difference]: Start difference. First operand 1784 states and 5811 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:51,481 INFO L93 Difference]: Finished difference Result 5112 states and 15104 transitions. [2021-06-05 16:01:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 16:01:51,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-06-05 16:01:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:51,489 INFO L225 Difference]: With dead ends: 5112 [2021-06-05 16:01:51,489 INFO L226 Difference]: Without dead ends: 5112 [2021-06-05 16:01:51,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 16:01:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5112 states. [2021-06-05 16:01:51,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5112 to 1804. [2021-06-05 16:01:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.265113699389906) internal successors, (5887), 1803 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5887 transitions. [2021-06-05 16:01:51,539 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5887 transitions. Word has length 27 [2021-06-05 16:01:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:51,539 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5887 transitions. [2021-06-05 16:01:51,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5887 transitions. [2021-06-05 16:01:51,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:51,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:51,542 INFO L521 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] [2021-06-05 16:01:51,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 16:01:51,760 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:51,760 INFO L82 PathProgramCache]: Analyzing trace with hash -650269269, now seen corresponding path program 18 times [2021-06-05 16:01:51,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:51,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484943684] [2021-06-05 16:01:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:51,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:51,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484943684] [2021-06-05 16:01:51,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484943684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:51,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994222311] [2021-06-05 16:01:51,802 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 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 [2021-06-05 16:01:51,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:01:51,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:51,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:51,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994222311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:51,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:51,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:01:51,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45716242] [2021-06-05 16:01:51,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:01:51,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:51,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:01:51,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:01:51,900 INFO L87 Difference]: Start difference. First operand 1804 states and 5887 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:52,490 INFO L93 Difference]: Finished difference Result 4837 states and 14460 transitions. [2021-06-05 16:01:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:01:52,490 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-06-05 16:01:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:52,497 INFO L225 Difference]: With dead ends: 4837 [2021-06-05 16:01:52,497 INFO L226 Difference]: Without dead ends: 4833 [2021-06-05 16:01:52,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:01:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4833 states. [2021-06-05 16:01:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4833 to 1804. [2021-06-05 16:01:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.2640044370493624) internal successors, (5885), 1803 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 5885 transitions. [2021-06-05 16:01:52,540 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 5885 transitions. Word has length 27 [2021-06-05 16:01:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:52,540 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 5885 transitions. [2021-06-05 16:01:52,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 5885 transitions. [2021-06-05 16:01:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:52,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:52,543 INFO L521 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] [2021-06-05 16:01:52,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 16:01:52,753 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash 739251947, now seen corresponding path program 19 times [2021-06-05 16:01:52,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:52,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532542512] [2021-06-05 16:01:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:52,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:52,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532542512] [2021-06-05 16:01:52,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532542512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:52,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556337034] [2021-06-05 16:01:52,782 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 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 [2021-06-05 16:01:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:52,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:52,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:52,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556337034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:52,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:52,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:52,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187817936] [2021-06-05 16:01:52,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:52,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:52,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:52,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:52,897 INFO L87 Difference]: Start difference. First operand 1804 states and 5885 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:53,566 INFO L93 Difference]: Finished difference Result 4879 states and 14554 transitions. [2021-06-05 16:01:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:01:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-06-05 16:01:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:53,573 INFO L225 Difference]: With dead ends: 4879 [2021-06-05 16:01:53,573 INFO L226 Difference]: Without dead ends: 4879 [2021-06-05 16:01:53,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:01:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-06-05 16:01:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 1814. [2021-06-05 16:01:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2675124103695534) internal successors, (5924), 1813 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:53,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5924 transitions. [2021-06-05 16:01:53,617 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5924 transitions. Word has length 27 [2021-06-05 16:01:53,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:53,617 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5924 transitions. [2021-06-05 16:01:53,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:53,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5924 transitions. [2021-06-05 16:01:53,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:53,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:53,622 INFO L521 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] [2021-06-05 16:01:53,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:53,837 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1773065879, now seen corresponding path program 20 times [2021-06-05 16:01:53,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:53,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851953131] [2021-06-05 16:01:53,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:53,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:53,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851953131] [2021-06-05 16:01:53,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851953131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:53,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965600803] [2021-06-05 16:01:53,874 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:01:53,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:53,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:53,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:53,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:54,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965600803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:54,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:54,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:54,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339059720] [2021-06-05 16:01:54,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:54,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:54,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:54,017 INFO L87 Difference]: Start difference. First operand 1814 states and 5924 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:54,666 INFO L93 Difference]: Finished difference Result 4586 states and 13852 transitions. [2021-06-05 16:01:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 16:01:54,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-06-05 16:01:54,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:54,674 INFO L225 Difference]: With dead ends: 4586 [2021-06-05 16:01:54,674 INFO L226 Difference]: Without dead ends: 4582 [2021-06-05 16:01:54,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 16:01:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2021-06-05 16:01:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 1814. [2021-06-05 16:01:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2664092664092665) internal successors, (5922), 1813 states have internal predecessors, (5922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5922 transitions. [2021-06-05 16:01:54,716 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5922 transitions. Word has length 27 [2021-06-05 16:01:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:54,716 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5922 transitions. [2021-06-05 16:01:54,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:54,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5922 transitions. [2021-06-05 16:01:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:54,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:54,719 INFO L521 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] [2021-06-05 16:01:54,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:54,933 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash -393874732, now seen corresponding path program 3 times [2021-06-05 16:01:54,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:54,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883195767] [2021-06-05 16:01:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:54,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883195767] [2021-06-05 16:01:54,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883195767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692153198] [2021-06-05 16:01:54,959 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 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 [2021-06-05 16:01:54,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 16:01:54,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 16:01:54,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:55,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:55,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692153198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:55,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:55,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 16:01:55,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177860693] [2021-06-05 16:01:55,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 16:01:55,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 16:01:55,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 16:01:55,034 INFO L87 Difference]: Start difference. First operand 1814 states and 5922 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 16:01:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:55,113 INFO L93 Difference]: Finished difference Result 1973 states and 6380 transitions. [2021-06-05 16:01:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 16:01:55,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 27 [2021-06-05 16:01:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:55,116 INFO L225 Difference]: With dead ends: 1973 [2021-06-05 16:01:55,116 INFO L226 Difference]: Without dead ends: 1973 [2021-06-05 16:01:55,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:01:55,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2021-06-05 16:01:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1690. [2021-06-05 16:01:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 3.2634695085849614) internal successors, (5512), 1689 states have internal predecessors, (5512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 5512 transitions. [2021-06-05 16:01:55,141 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 5512 transitions. Word has length 27 [2021-06-05 16:01:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:55,141 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 5512 transitions. [2021-06-05 16:01:55,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2021-06-05 16:01:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 5512 transitions. [2021-06-05 16:01:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:55,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:55,144 INFO L521 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] [2021-06-05 16:01:55,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 16:01:55,361 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:55,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:55,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1713019731, now seen corresponding path program 21 times [2021-06-05 16:01:55,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:55,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60618608] [2021-06-05 16:01:55,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:55,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:55,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60618608] [2021-06-05 16:01:55,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60618608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:55,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912420390] [2021-06-05 16:01:55,393 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 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 [2021-06-05 16:01:55,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:01:55,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:55,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912420390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:55,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:55,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:01:55,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211487834] [2021-06-05 16:01:55,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:01:55,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:55,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:01:55,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:01:55,464 INFO L87 Difference]: Start difference. First operand 1690 states and 5512 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:55,767 INFO L93 Difference]: Finished difference Result 3078 states and 9480 transitions. [2021-06-05 16:01:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:01:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-06-05 16:01:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:55,771 INFO L225 Difference]: With dead ends: 3078 [2021-06-05 16:01:55,771 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 16:01:55,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:01:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 16:01:55,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1814. [2021-06-05 16:01:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2465526751241036) internal successors, (5886), 1813 states have internal predecessors, (5886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5886 transitions. [2021-06-05 16:01:55,801 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5886 transitions. Word has length 27 [2021-06-05 16:01:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:55,801 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 5886 transitions. [2021-06-05 16:01:55,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5886 transitions. [2021-06-05 16:01:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:55,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:55,804 INFO L521 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] [2021-06-05 16:01:56,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:56,020 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1929419657, now seen corresponding path program 22 times [2021-06-05 16:01:56,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:56,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520799118] [2021-06-05 16:01:56,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:56,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520799118] [2021-06-05 16:01:56,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520799118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:56,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719746777] [2021-06-05 16:01:56,052 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 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 [2021-06-05 16:01:56,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:01:56,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:56,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:56,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719746777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:56,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:56,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:01:56,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405859280] [2021-06-05 16:01:56,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:01:56,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:56,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:01:56,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:01:56,135 INFO L87 Difference]: Start difference. First operand 1814 states and 5886 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:56,375 INFO L93 Difference]: Finished difference Result 3165 states and 9710 transitions. [2021-06-05 16:01:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:01:56,376 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-06-05 16:01:56,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:56,380 INFO L225 Difference]: With dead ends: 3165 [2021-06-05 16:01:56,380 INFO L226 Difference]: Without dead ends: 3165 [2021-06-05 16:01:56,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:01:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3165 states. [2021-06-05 16:01:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3165 to 1928. [2021-06-05 16:01:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2283341982355993) internal successors, (6221), 1927 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6221 transitions. [2021-06-05 16:01:56,412 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6221 transitions. Word has length 27 [2021-06-05 16:01:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:56,412 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6221 transitions. [2021-06-05 16:01:56,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:56,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6221 transitions. [2021-06-05 16:01:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:56,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:56,415 INFO L521 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] [2021-06-05 16:01:56,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 16:01:56,621 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:56,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash 815616699, now seen corresponding path program 23 times [2021-06-05 16:01:56,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:56,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261284372] [2021-06-05 16:01:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:56,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261284372] [2021-06-05 16:01:56,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261284372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487952346] [2021-06-05 16:01:56,703 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 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 [2021-06-05 16:01:56,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:01:56,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 16:01:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487952346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:56,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:56,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 16:01:56,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129022464] [2021-06-05 16:01:56,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 16:01:56,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:56,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 16:01:56,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 16:01:56,821 INFO L87 Difference]: Start difference. First operand 1928 states and 6221 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:57,041 INFO L93 Difference]: Finished difference Result 3029 states and 9362 transitions. [2021-06-05 16:01:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 16:01:57,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-06-05 16:01:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:57,045 INFO L225 Difference]: With dead ends: 3029 [2021-06-05 16:01:57,045 INFO L226 Difference]: Without dead ends: 3025 [2021-06-05 16:01:57,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:01:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3025 states. [2021-06-05 16:01:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3025 to 1928. [2021-06-05 16:01:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.2272963155163468) internal successors, (6219), 1927 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6219 transitions. [2021-06-05 16:01:57,074 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6219 transitions. Word has length 27 [2021-06-05 16:01:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:57,074 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6219 transitions. [2021-06-05 16:01:57,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6219 transitions. [2021-06-05 16:01:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:57,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:57,077 INFO L521 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] [2021-06-05 16:01:57,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:57,293 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1987345865, now seen corresponding path program 24 times [2021-06-05 16:01:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:57,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895406024] [2021-06-05 16:01:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:57,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:57,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895406024] [2021-06-05 16:01:57,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895406024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:57,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785957112] [2021-06-05 16:01:57,320 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 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 [2021-06-05 16:01:57,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:01:57,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:57,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:57,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785957112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:57,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:57,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 16:01:57,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124536404] [2021-06-05 16:01:57,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 16:01:57,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:57,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 16:01:57,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 16:01:57,388 INFO L87 Difference]: Start difference. First operand 1928 states and 6219 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:57,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:57,635 INFO L93 Difference]: Finished difference Result 3009 states and 9316 transitions. [2021-06-05 16:01:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:01:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-06-05 16:01:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:57,639 INFO L225 Difference]: With dead ends: 3009 [2021-06-05 16:01:57,639 INFO L226 Difference]: Without dead ends: 2993 [2021-06-05 16:01:57,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:01:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-06-05 16:01:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 1936. [2021-06-05 16:01:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 3.221188630490956) internal successors, (6233), 1935 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 6233 transitions. [2021-06-05 16:01:57,669 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 6233 transitions. Word has length 27 [2021-06-05 16:01:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:57,669 INFO L482 AbstractCegarLoop]: Abstraction has 1936 states and 6233 transitions. [2021-06-05 16:01:57,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 6233 transitions. [2021-06-05 16:01:57,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:57,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:57,672 INFO L521 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] [2021-06-05 16:01:57,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 16:01:57,877 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:57,877 INFO L82 PathProgramCache]: Analyzing trace with hash 353835191, now seen corresponding path program 25 times [2021-06-05 16:01:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:57,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909781054] [2021-06-05 16:01:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:57,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:57,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909781054] [2021-06-05 16:01:57,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909781054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:57,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520011711] [2021-06-05 16:01:57,915 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 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 [2021-06-05 16:01:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:57,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:57,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:58,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520011711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:58,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:58,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:58,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921388538] [2021-06-05 16:01:58,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:58,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:58,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:58,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:58,024 INFO L87 Difference]: Start difference. First operand 1936 states and 6233 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:58,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:58,525 INFO L93 Difference]: Finished difference Result 5256 states and 16466 transitions. [2021-06-05 16:01:58,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:01:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:58,541 INFO L225 Difference]: With dead ends: 5256 [2021-06-05 16:01:58,541 INFO L226 Difference]: Without dead ends: 5256 [2021-06-05 16:01:58,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:01:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-06-05 16:01:58,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 2054. [2021-06-05 16:01:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.297613248904043) internal successors, (6770), 2053 states have internal predecessors, (6770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6770 transitions. [2021-06-05 16:01:58,584 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6770 transitions. Word has length 27 [2021-06-05 16:01:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:58,584 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 6770 transitions. [2021-06-05 16:01:58,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6770 transitions. [2021-06-05 16:01:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:58,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:58,588 INFO L521 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] [2021-06-05 16:01:58,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:01:58,795 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash 159934523, now seen corresponding path program 26 times [2021-06-05 16:01:58,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:58,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018463028] [2021-06-05 16:01:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:58,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:58,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018463028] [2021-06-05 16:01:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018463028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:58,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897486547] [2021-06-05 16:01:58,824 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 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 [2021-06-05 16:01:58,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:01:58,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:58,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:58,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:58,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897486547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:58,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:58,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:01:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930374775] [2021-06-05 16:01:58,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:01:58,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:01:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:01:58,947 INFO L87 Difference]: Start difference. First operand 2054 states and 6770 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:01:59,411 INFO L93 Difference]: Finished difference Result 5169 states and 16251 transitions. [2021-06-05 16:01:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 16:01:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-06-05 16:01:59,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:01:59,419 INFO L225 Difference]: With dead ends: 5169 [2021-06-05 16:01:59,419 INFO L226 Difference]: Without dead ends: 5169 [2021-06-05 16:01:59,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 291.4ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:01:59,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5169 states. [2021-06-05 16:01:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5169 to 2051. [2021-06-05 16:01:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 16:01:59,462 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 16:01:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:01:59,463 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 16:01:59,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:01:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 16:01:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:01:59,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:01:59,466 INFO L521 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] [2021-06-05 16:01:59,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 16:01:59,673 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:01:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:01:59,674 INFO L82 PathProgramCache]: Analyzing trace with hash -211975243, now seen corresponding path program 27 times [2021-06-05 16:01:59,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:01:59,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451224070] [2021-06-05 16:01:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:01:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:01:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:59,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:01:59,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451224070] [2021-06-05 16:01:59,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451224070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:59,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963595304] [2021-06-05 16:01:59,722 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 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 [2021-06-05 16:01:59,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:01:59,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:01:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:01:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:01:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:01:59,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963595304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:01:59,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:01:59,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:01:59,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615916742] [2021-06-05 16:01:59,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:01:59,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:01:59,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:01:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:01:59,812 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:00,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:00,273 INFO L93 Difference]: Finished difference Result 4755 states and 14772 transitions. [2021-06-05 16:02:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 16:02:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-06-05 16:02:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:00,280 INFO L225 Difference]: With dead ends: 4755 [2021-06-05 16:02:00,280 INFO L226 Difference]: Without dead ends: 4755 [2021-06-05 16:02:00,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:02:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4755 states. [2021-06-05 16:02:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4755 to 2057. [2021-06-05 16:02:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-05 16:02:00,320 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-05 16:02:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:00,320 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-05 16:02:00,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-05 16:02:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:00,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:00,323 INFO L521 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] [2021-06-05 16:02:00,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:00,524 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:00,524 INFO L82 PathProgramCache]: Analyzing trace with hash -401193541, now seen corresponding path program 28 times [2021-06-05 16:02:00,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:00,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044357988] [2021-06-05 16:02:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:00,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:00,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044357988] [2021-06-05 16:02:00,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044357988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:00,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298545164] [2021-06-05 16:02:00,556 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 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 [2021-06-05 16:02:00,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:00,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:00,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:00,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:00,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298545164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:00,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:00,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:02:00,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423002212] [2021-06-05 16:02:00,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:02:00,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:02:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:02:00,664 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:01,036 INFO L93 Difference]: Finished difference Result 4606 states and 14402 transitions. [2021-06-05 16:02:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:02:01,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 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 [2021-06-05 16:02:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:01,042 INFO L225 Difference]: With dead ends: 4606 [2021-06-05 16:02:01,043 INFO L226 Difference]: Without dead ends: 4602 [2021-06-05 16:02:01,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 16:02:01,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2021-06-05 16:02:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 2051. [2021-06-05 16:02:01,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 16:02:01,082 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 16:02:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:01,082 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 16:02:01,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 16:02:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:01,085 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:01,086 INFO L521 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] [2021-06-05 16:02:01,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:01,286 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:01,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:01,286 INFO L82 PathProgramCache]: Analyzing trace with hash 988327675, now seen corresponding path program 29 times [2021-06-05 16:02:01,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:01,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123901636] [2021-06-05 16:02:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:01,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:01,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123901636] [2021-06-05 16:02:01,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123901636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:01,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284936489] [2021-06-05 16:02:01,327 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 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 [2021-06-05 16:02:01,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:02:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:01,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:01,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284936489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:01,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:01,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:02:01,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143074714] [2021-06-05 16:02:01,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:02:01,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:01,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:02:01,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:02:01,434 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:01,873 INFO L93 Difference]: Finished difference Result 4605 states and 14373 transitions. [2021-06-05 16:02:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:02:01,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-06-05 16:02:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:01,880 INFO L225 Difference]: With dead ends: 4605 [2021-06-05 16:02:01,880 INFO L226 Difference]: Without dead ends: 4605 [2021-06-05 16:02:01,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:02:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-05 16:02:01,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 2057. [2021-06-05 16:02:01,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.2981517509727625) internal successors, (6781), 2056 states have internal predecessors, (6781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 6781 transitions. [2021-06-05 16:02:01,922 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 6781 transitions. Word has length 27 [2021-06-05 16:02:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:01,923 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 6781 transitions. [2021-06-05 16:02:01,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 6781 transitions. [2021-06-05 16:02:01,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:01,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:01,926 INFO L521 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] [2021-06-05 16:02:02,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 16:02:02,141 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1523990151, now seen corresponding path program 30 times [2021-06-05 16:02:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:02,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266520614] [2021-06-05 16:02:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:02,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266520614] [2021-06-05 16:02:02,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266520614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:02,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039759759] [2021-06-05 16:02:02,171 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 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 [2021-06-05 16:02:02,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:02:02,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:02,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:02,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:02,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039759759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:02,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:02,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:02:02,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091112994] [2021-06-05 16:02:02,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:02:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:02,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:02:02,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:02:02,281 INFO L87 Difference]: Start difference. First operand 2057 states and 6781 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:02,666 INFO L93 Difference]: Finished difference Result 4532 states and 14195 transitions. [2021-06-05 16:02:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:02:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-06-05 16:02:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:02,673 INFO L225 Difference]: With dead ends: 4532 [2021-06-05 16:02:02,673 INFO L226 Difference]: Without dead ends: 4528 [2021-06-05 16:02:02,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:02:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4528 states. [2021-06-05 16:02:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4528 to 2051. [2021-06-05 16:02:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.295609756097561) internal successors, (6756), 2050 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6756 transitions. [2021-06-05 16:02:02,711 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6756 transitions. Word has length 27 [2021-06-05 16:02:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:02,711 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 6756 transitions. [2021-06-05 16:02:02,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6756 transitions. [2021-06-05 16:02:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:02,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:02,714 INFO L521 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] [2021-06-05 16:02:02,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:02,914 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:02,915 INFO L82 PathProgramCache]: Analyzing trace with hash -480721671, now seen corresponding path program 31 times [2021-06-05 16:02:02,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:02,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449892845] [2021-06-05 16:02:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:02,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:02,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449892845] [2021-06-05 16:02:02,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449892845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:02,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457072229] [2021-06-05 16:02:02,943 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 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 [2021-06-05 16:02:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:02,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:02,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:03,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457072229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:03,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:03,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:02:03,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769198247] [2021-06-05 16:02:03,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:02:03,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:02:03,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:02:03,023 INFO L87 Difference]: Start difference. First operand 2051 states and 6756 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:02:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:03,380 INFO L93 Difference]: Finished difference Result 4168 states and 12771 transitions. [2021-06-05 16:02:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:02:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-06-05 16:02:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:03,387 INFO L225 Difference]: With dead ends: 4168 [2021-06-05 16:02:03,387 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 16:02:03,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 16:02:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 16:02:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2247. [2021-06-05 16:02:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.2996438112199464) internal successors, (7411), 2246 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7411 transitions. [2021-06-05 16:02:03,434 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7411 transitions. Word has length 27 [2021-06-05 16:02:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:03,434 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7411 transitions. [2021-06-05 16:02:03,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:02:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7411 transitions. [2021-06-05 16:02:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:03,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:03,438 INFO L521 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] [2021-06-05 16:02:03,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 16:02:03,654 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash -669939969, now seen corresponding path program 32 times [2021-06-05 16:02:03,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:03,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838609353] [2021-06-05 16:02:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:03,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:03,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838609353] [2021-06-05 16:02:03,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838609353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:03,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953739932] [2021-06-05 16:02:03,698 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 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 [2021-06-05 16:02:03,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:03,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:03,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:03,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953739932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:03,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:03,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:02:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961552855] [2021-06-05 16:02:03,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:02:03,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:02:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:02:03,791 INFO L87 Difference]: Start difference. First operand 2247 states and 7411 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:02:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:04,126 INFO L93 Difference]: Finished difference Result 3963 states and 12253 transitions. [2021-06-05 16:02:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:02:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-06-05 16:02:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:04,132 INFO L225 Difference]: With dead ends: 3963 [2021-06-05 16:02:04,132 INFO L226 Difference]: Without dead ends: 3959 [2021-06-05 16:02:04,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:02:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3959 states. [2021-06-05 16:02:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3959 to 2247. [2021-06-05 16:02:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.298753339269813) internal successors, (7409), 2246 states have internal predecessors, (7409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7409 transitions. [2021-06-05 16:02:04,172 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7409 transitions. Word has length 27 [2021-06-05 16:02:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:04,172 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7409 transitions. [2021-06-05 16:02:04,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:02:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7409 transitions. [2021-06-05 16:02:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:04,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:04,175 INFO L521 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] [2021-06-05 16:02:04,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:04,376 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash -26557709, now seen corresponding path program 33 times [2021-06-05 16:02:04,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:04,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682629416] [2021-06-05 16:02:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:04,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:04,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682629416] [2021-06-05 16:02:04,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682629416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:04,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293665722] [2021-06-05 16:02:04,419 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 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 [2021-06-05 16:02:04,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 16:02:04,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:04,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293665722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:04,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:04,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 16:02:04,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585557123] [2021-06-05 16:02:04,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 16:02:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 16:02:04,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 16:02:04,509 INFO L87 Difference]: Start difference. First operand 2247 states and 7409 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:02:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:04,747 INFO L93 Difference]: Finished difference Result 3687 states and 11591 transitions. [2021-06-05 16:02:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:02:04,747 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 27 [2021-06-05 16:02:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:04,752 INFO L225 Difference]: With dead ends: 3687 [2021-06-05 16:02:04,752 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 16:02:04,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:04,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 16:02:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 2247. [2021-06-05 16:02:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296081923419412) internal successors, (7403), 2246 states have internal predecessors, (7403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7403 transitions. [2021-06-05 16:02:04,786 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7403 transitions. Word has length 27 [2021-06-05 16:02:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:04,788 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 7403 transitions. [2021-06-05 16:02:04,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-05 16:02:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7403 transitions. [2021-06-05 16:02:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:04,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:04,792 INFO L521 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] [2021-06-05 16:02:04,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-05 16:02:04,992 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:04,993 INFO L82 PathProgramCache]: Analyzing trace with hash 285798263, now seen corresponding path program 34 times [2021-06-05 16:02:04,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:04,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981000537] [2021-06-05 16:02:04,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:05,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981000537] [2021-06-05 16:02:05,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981000537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357904444] [2021-06-05 16:02:05,030 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 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 [2021-06-05 16:02:05,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:05,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:05,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:05,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:05,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:05,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357904444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:05,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:05,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:02:05,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437789182] [2021-06-05 16:02:05,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:02:05,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:05,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:02:05,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:02:05,123 INFO L87 Difference]: Start difference. First operand 2247 states and 7403 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:05,469 INFO L93 Difference]: Finished difference Result 3798 states and 11861 transitions. [2021-06-05 16:02:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:02:05,469 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-06-05 16:02:05,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:05,474 INFO L225 Difference]: With dead ends: 3798 [2021-06-05 16:02:05,475 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 16:02:05,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 16:02:05,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 16:02:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 2417. [2021-06-05 16:02:05,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.287251655629139) internal successors, (7942), 2416 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7942 transitions. [2021-06-05 16:02:05,512 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7942 transitions. Word has length 27 [2021-06-05 16:02:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:05,513 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7942 transitions. [2021-06-05 16:02:05,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7942 transitions. [2021-06-05 16:02:05,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:05,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:05,516 INFO L521 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] [2021-06-05 16:02:05,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 16:02:05,717 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:05,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2068447733, now seen corresponding path program 35 times [2021-06-05 16:02:05,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:05,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561489652] [2021-06-05 16:02:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:05,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561489652] [2021-06-05 16:02:05,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561489652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47711814] [2021-06-05 16:02:05,748 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 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 [2021-06-05 16:02:05,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 16:02:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:05,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47711814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:05,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:05,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 16:02:05,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067725007] [2021-06-05 16:02:05,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 16:02:05,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:05,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 16:02:05,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 16:02:05,838 INFO L87 Difference]: Start difference. First operand 2417 states and 7942 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:06,185 INFO L93 Difference]: Finished difference Result 3765 states and 11785 transitions. [2021-06-05 16:02:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:02:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-06-05 16:02:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:06,190 INFO L225 Difference]: With dead ends: 3765 [2021-06-05 16:02:06,190 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 16:02:06,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 16:02:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 16:02:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2417. [2021-06-05 16:02:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2864238410596025) internal successors, (7940), 2416 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7940 transitions. [2021-06-05 16:02:06,231 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7940 transitions. Word has length 27 [2021-06-05 16:02:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:06,231 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7940 transitions. [2021-06-05 16:02:06,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7940 transitions. [2021-06-05 16:02:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 16:02:06,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:06,234 INFO L521 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] [2021-06-05 16:02:06,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:06,449 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:06,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1223476281, now seen corresponding path program 36 times [2021-06-05 16:02:06,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:06,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307149572] [2021-06-05 16:02:06,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:06,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:06,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307149572] [2021-06-05 16:02:06,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307149572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:06,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999248727] [2021-06-05 16:02:06,481 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 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 [2021-06-05 16:02:06,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 16:02:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 16:02:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:06,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999248727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:06,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:06,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 16:02:06,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024939729] [2021-06-05 16:02:06,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 16:02:06,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 16:02:06,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 16:02:06,578 INFO L87 Difference]: Start difference. First operand 2417 states and 7940 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:06,762 INFO L93 Difference]: Finished difference Result 3553 states and 11291 transitions. [2021-06-05 16:02:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 16:02:06,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2021-06-05 16:02:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:06,767 INFO L225 Difference]: With dead ends: 3553 [2021-06-05 16:02:06,767 INFO L226 Difference]: Without dead ends: 3537 [2021-06-05 16:02:06,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:02:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-06-05 16:02:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 2417. [2021-06-05 16:02:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 3.2839403973509933) internal successors, (7934), 2416 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 7934 transitions. [2021-06-05 16:02:06,808 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 7934 transitions. Word has length 27 [2021-06-05 16:02:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:06,809 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 7934 transitions. [2021-06-05 16:02:06,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 7934 transitions. [2021-06-05 16:02:06,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:06,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:06,813 INFO L521 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] [2021-06-05 16:02:07,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 16:02:07,033 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:07,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2108890711, now seen corresponding path program 4 times [2021-06-05 16:02:07,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:07,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038180734] [2021-06-05 16:02:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:07,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:07,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038180734] [2021-06-05 16:02:07,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038180734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:07,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454188353] [2021-06-05 16:02:07,400 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 [2021-06-05 16:02:07,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:07,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:02:07,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:07,636 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 43 treesize of output 35 [2021-06-05 16:02:07,638 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:07,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:07,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:07,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:07,647 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 35 treesize of output 27 [2021-06-05 16:02:07,649 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:07,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:07,662 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:07,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:07,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:07,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:07,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:07,676 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:02:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:07,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454188353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:07,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:07,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:02:07,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660966691] [2021-06-05 16:02:07,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:02:07,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:07,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:02:07,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:02:07,694 INFO L87 Difference]: Start difference. First operand 2417 states and 7934 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:08,607 INFO L93 Difference]: Finished difference Result 3240 states and 10404 transitions. [2021-06-05 16:02:08,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:02:08,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:08,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:08,612 INFO L225 Difference]: With dead ends: 3240 [2021-06-05 16:02:08,612 INFO L226 Difference]: Without dead ends: 3225 [2021-06-05 16:02:08,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 876.4ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:02:08,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-06-05 16:02:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2459. [2021-06-05 16:02:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 3.2782750203417415) internal successors, (8058), 2458 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:08,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 8058 transitions. [2021-06-05 16:02:08,653 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 8058 transitions. Word has length 30 [2021-06-05 16:02:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:08,653 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 8058 transitions. [2021-06-05 16:02:08,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 8058 transitions. [2021-06-05 16:02:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:08,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:08,657 INFO L521 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] [2021-06-05 16:02:08,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:08,863 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:08,863 INFO L82 PathProgramCache]: Analyzing trace with hash 718703517, now seen corresponding path program 5 times [2021-06-05 16:02:08,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:08,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982055047] [2021-06-05 16:02:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:09,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982055047] [2021-06-05 16:02:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982055047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:09,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485322329] [2021-06-05 16:02:09,157 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 [2021-06-05 16:02:09,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:02:09,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:09,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:02:09,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:09,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:09,424 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 43 treesize of output 35 [2021-06-05 16:02:09,426 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:09,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:09,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:09,435 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 35 treesize of output 27 [2021-06-05 16:02:09,440 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:09,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:09,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:09,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:09,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:09,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:09,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:09,464 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:02:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:09,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485322329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:09,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:09,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 16:02:09,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15082832] [2021-06-05 16:02:09,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:09,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:09,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:09,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:09,485 INFO L87 Difference]: Start difference. First operand 2459 states and 8058 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:10,896 INFO L93 Difference]: Finished difference Result 3258 states and 10455 transitions. [2021-06-05 16:02:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:02:10,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:10,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:10,901 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 16:02:10,901 INFO L226 Difference]: Without dead ends: 3243 [2021-06-05 16:02:10,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1300.5ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 16:02:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2021-06-05 16:02:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2471. [2021-06-05 16:02:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2471 states, 2470 states have (on average 3.2753036437246963) internal successors, (8090), 2470 states have internal predecessors, (8090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 8090 transitions. [2021-06-05 16:02:10,935 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 8090 transitions. Word has length 30 [2021-06-05 16:02:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:10,936 INFO L482 AbstractCegarLoop]: Abstraction has 2471 states and 8090 transitions. [2021-06-05 16:02:10,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 8090 transitions. [2021-06-05 16:02:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:10,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:10,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:11,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:11,139 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1188939468, now seen corresponding path program 37 times [2021-06-05 16:02:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:11,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538160748] [2021-06-05 16:02:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:11,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538160748] [2021-06-05 16:02:11,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538160748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:11,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967086183] [2021-06-05 16:02:11,582 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 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 [2021-06-05 16:02:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:11,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:02:11,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:11,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:11,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:11,831 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 47 treesize of output 37 [2021-06-05 16:02:11,843 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:11,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:11,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:11,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:11,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:11,854 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 37 treesize of output 27 [2021-06-05 16:02:11,858 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:11,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:11,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:11,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:11,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:11,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:11,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:02:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967086183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:11,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:11,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 16:02:11,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6437633] [2021-06-05 16:02:11,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:02:11,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:02:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:02:11,900 INFO L87 Difference]: Start difference. First operand 2471 states and 8090 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:16,277 INFO L93 Difference]: Finished difference Result 3579 states and 11315 transitions. [2021-06-05 16:02:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 16:02:16,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:16,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:16,283 INFO L225 Difference]: With dead ends: 3579 [2021-06-05 16:02:16,283 INFO L226 Difference]: Without dead ends: 3553 [2021-06-05 16:02:16,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 3945.1ms TimeCoverageRelationStatistics Valid=836, Invalid=5644, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 16:02:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-06-05 16:02:16,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2550. [2021-06-05 16:02:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.26480972930561) internal successors, (8322), 2549 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8322 transitions. [2021-06-05 16:02:16,319 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8322 transitions. Word has length 30 [2021-06-05 16:02:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:16,319 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8322 transitions. [2021-06-05 16:02:16,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8322 transitions. [2021-06-05 16:02:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:16,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:16,322 INFO L521 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] [2021-06-05 16:02:16,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:16,523 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1000041265, now seen corresponding path program 6 times [2021-06-05 16:02:16,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:16,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106969589] [2021-06-05 16:02:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:16,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:16,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:16,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106969589] [2021-06-05 16:02:16,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106969589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:16,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713511626] [2021-06-05 16:02:16,834 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 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 [2021-06-05 16:02:16,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:02:16,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:16,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:02:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:02:17,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:17,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:17,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:02:17,069 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:17,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:02:17,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:02:17,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:17,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:17,191 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 16:02:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:17,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713511626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:17,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:17,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:02:17,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32034497] [2021-06-05 16:02:17,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:02:17,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:02:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:02:17,255 INFO L87 Difference]: Start difference. First operand 2550 states and 8322 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:19,874 INFO L93 Difference]: Finished difference Result 4175 states and 13154 transitions. [2021-06-05 16:02:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:02:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:19,881 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 16:02:19,881 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 16:02:19,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 2155.6ms TimeCoverageRelationStatistics Valid=495, Invalid=3411, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:02:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 16:02:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 2618. [2021-06-05 16:02:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 3.2777990064959877) internal successors, (8578), 2617 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 8578 transitions. [2021-06-05 16:02:19,920 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 8578 transitions. Word has length 30 [2021-06-05 16:02:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:19,920 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 8578 transitions. [2021-06-05 16:02:19,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:19,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 8578 transitions. [2021-06-05 16:02:19,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:19,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:19,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:20,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:20,124 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:20,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:20,124 INFO L82 PathProgramCache]: Analyzing trace with hash 981677892, now seen corresponding path program 38 times [2021-06-05 16:02:20,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:20,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293511483] [2021-06-05 16:02:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:20,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:20,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293511483] [2021-06-05 16:02:20,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293511483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:20,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788043803] [2021-06-05 16:02:20,602 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 [2021-06-05 16:02:20,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:20,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:02:20,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:20,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,863 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 47 treesize of output 37 [2021-06-05 16:02:20,865 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:20,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:20,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:20,876 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 37 treesize of output 27 [2021-06-05 16:02:20,878 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:20,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:20,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:20,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:20,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:20,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:20,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:20,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:02:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:20,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788043803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:20,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:20,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 16:02:20,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928277443] [2021-06-05 16:02:20,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:02:20,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:02:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:02:20,921 INFO L87 Difference]: Start difference. First operand 2618 states and 8578 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 16:02:22,029 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 16:02:22,378 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 16:02:22,645 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 16:02:23,915 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 16:02:24,188 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 16:02:24,932 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-06-05 16:02:25,873 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 16:02:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:27,090 INFO L93 Difference]: Finished difference Result 4273 states and 13434 transitions. [2021-06-05 16:02:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 16:02:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 30 [2021-06-05 16:02:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:27,096 INFO L225 Difference]: With dead ends: 4273 [2021-06-05 16:02:27,097 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 16:02:27,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 5569.3ms TimeCoverageRelationStatistics Valid=1231, Invalid=7511, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 16:02:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 16:02:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 2648. [2021-06-05 16:02:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 3.2795617680392897) internal successors, (8681), 2647 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 8681 transitions. [2021-06-05 16:02:27,161 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 8681 transitions. Word has length 30 [2021-06-05 16:02:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:27,161 INFO L482 AbstractCegarLoop]: Abstraction has 2648 states and 8681 transitions. [2021-06-05 16:02:27,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 16:02:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 8681 transitions. [2021-06-05 16:02:27,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:27,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:27,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:27,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 16:02:27,365 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:27,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1470198580, now seen corresponding path program 39 times [2021-06-05 16:02:27,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:27,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000742093] [2021-06-05 16:02:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:27,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:27,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000742093] [2021-06-05 16:02:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000742093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:27,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763200971] [2021-06-05 16:02:27,668 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 [2021-06-05 16:02:27,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:02:27,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:27,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:02:27,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:27,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:27,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:27,915 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 47 treesize of output 37 [2021-06-05 16:02:27,917 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:27,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:27,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:27,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:27,926 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 37 treesize of output 27 [2021-06-05 16:02:27,928 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:27,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:27,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:27,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:27,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:27,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:27,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:27,970 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:02:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:27,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763200971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:27,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:27,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 16:02:27,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118822231] [2021-06-05 16:02:27,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:27,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:27,992 INFO L87 Difference]: Start difference. First operand 2648 states and 8681 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:29,962 INFO L93 Difference]: Finished difference Result 4578 states and 14253 transitions. [2021-06-05 16:02:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:02:29,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:29,968 INFO L225 Difference]: With dead ends: 4578 [2021-06-05 16:02:29,968 INFO L226 Difference]: Without dead ends: 4548 [2021-06-05 16:02:29,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1592.1ms TimeCoverageRelationStatistics Valid=380, Invalid=2926, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 16:02:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-06-05 16:02:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2789. [2021-06-05 16:02:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 3.2672166427546627) internal successors, (9109), 2788 states have internal predecessors, (9109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:30,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 9109 transitions. [2021-06-05 16:02:30,008 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 9109 transitions. Word has length 30 [2021-06-05 16:02:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:30,008 INFO L482 AbstractCegarLoop]: Abstraction has 2789 states and 9109 transitions. [2021-06-05 16:02:30,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 9109 transitions. [2021-06-05 16:02:30,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:30,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:30,011 INFO L521 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] [2021-06-05 16:02:30,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 16:02:30,212 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:30,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:30,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1223301609, now seen corresponding path program 7 times [2021-06-05 16:02:30,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:30,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559735533] [2021-06-05 16:02:30,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:30,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:30,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559735533] [2021-06-05 16:02:30,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559735533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:30,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085244277] [2021-06-05 16:02:30,505 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 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 [2021-06-05 16:02:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:30,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:02:30,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:30,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:30,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:30,730 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 43 treesize of output 35 [2021-06-05 16:02:30,731 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:30,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:30,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:30,740 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 35 treesize of output 27 [2021-06-05 16:02:30,741 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:30,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:30,752 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:30,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:30,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:30,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:30,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:30,762 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:02:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:30,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085244277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:30,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:30,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:02:30,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266145069] [2021-06-05 16:02:30,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:02:30,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:30,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:02:30,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:02:30,787 INFO L87 Difference]: Start difference. First operand 2789 states and 9109 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:31,650 INFO L93 Difference]: Finished difference Result 3530 states and 11354 transitions. [2021-06-05 16:02:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:02:31,650 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:31,655 INFO L225 Difference]: With dead ends: 3530 [2021-06-05 16:02:31,655 INFO L226 Difference]: Without dead ends: 3515 [2021-06-05 16:02:31,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 16:02:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2021-06-05 16:02:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 2803. [2021-06-05 16:02:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 3.2658815132048535) internal successors, (9151), 2802 states have internal predecessors, (9151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 9151 transitions. [2021-06-05 16:02:31,690 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 9151 transitions. Word has length 30 [2021-06-05 16:02:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:31,690 INFO L482 AbstractCegarLoop]: Abstraction has 2803 states and 9151 transitions. [2021-06-05 16:02:31,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 9151 transitions. [2021-06-05 16:02:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:31,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:31,693 INFO L521 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] [2021-06-05 16:02:31,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 16:02:31,898 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:31,898 INFO L82 PathProgramCache]: Analyzing trace with hash -244071459, now seen corresponding path program 8 times [2021-06-05 16:02:31,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:31,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870532625] [2021-06-05 16:02:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:32,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:32,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870532625] [2021-06-05 16:02:32,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870532625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:32,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536657553] [2021-06-05 16:02:32,164 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 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 [2021-06-05 16:02:32,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:02:32,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:02:32,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:32,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:32,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-06-05 16:02:32,359 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:32,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:32,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:32,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 16:02:32,407 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:32,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:32,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 49 [2021-06-05 16:02:32,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:02:32,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:32,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:32,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-06-05 16:02:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:32,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536657553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:32,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:32,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 16:02:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738729230] [2021-06-05 16:02:32,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:02:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:02:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:02:32,555 INFO L87 Difference]: Start difference. First operand 2803 states and 9151 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:34,518 INFO L93 Difference]: Finished difference Result 4025 states and 12918 transitions. [2021-06-05 16:02:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:02:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:34,524 INFO L225 Difference]: With dead ends: 4025 [2021-06-05 16:02:34,524 INFO L226 Difference]: Without dead ends: 4000 [2021-06-05 16:02:34,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1493.5ms TimeCoverageRelationStatistics Valid=362, Invalid=2394, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:02:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4000 states. [2021-06-05 16:02:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4000 to 2795. [2021-06-05 16:02:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2795 states, 2794 states have (on average 3.267716535433071) internal successors, (9130), 2794 states have internal predecessors, (9130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 9130 transitions. [2021-06-05 16:02:34,563 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 9130 transitions. Word has length 30 [2021-06-05 16:02:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:34,563 INFO L482 AbstractCegarLoop]: Abstraction has 2795 states and 9130 transitions. [2021-06-05 16:02:34,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 9130 transitions. [2021-06-05 16:02:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:34,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:34,566 INFO L521 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] [2021-06-05 16:02:34,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 16:02:34,781 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash 137406081, now seen corresponding path program 9 times [2021-06-05 16:02:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:34,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763507777] [2021-06-05 16:02:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:35,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:35,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763507777] [2021-06-05 16:02:35,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763507777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:35,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287012931] [2021-06-05 16:02:35,093 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 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 [2021-06-05 16:02:35,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:02:35,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:02:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:35,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,399 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 43 treesize of output 35 [2021-06-05 16:02:35,401 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:35,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:35,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:35,411 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 35 treesize of output 27 [2021-06-05 16:02:35,412 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:35,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:35,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:35,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:35,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:35,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:35,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:35,437 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-06-05 16:02:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:35,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287012931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:35,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:35,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:02:35,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952894452] [2021-06-05 16:02:35,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:02:35,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:35,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:02:35,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:02:35,457 INFO L87 Difference]: Start difference. First operand 2795 states and 9130 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:36,193 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 16:02:40,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:40,057 INFO L93 Difference]: Finished difference Result 3604 states and 11567 transitions. [2021-06-05 16:02:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 16:02:40,057 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:40,063 INFO L225 Difference]: With dead ends: 3604 [2021-06-05 16:02:40,064 INFO L226 Difference]: Without dead ends: 3589 [2021-06-05 16:02:40,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1585.0ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:02:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2021-06-05 16:02:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 2807. [2021-06-05 16:02:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2807 states, 2806 states have (on average 3.270848182466144) internal successors, (9178), 2806 states have internal predecessors, (9178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:40,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2807 states to 2807 states and 9178 transitions. [2021-06-05 16:02:40,106 INFO L78 Accepts]: Start accepts. Automaton has 2807 states and 9178 transitions. Word has length 30 [2021-06-05 16:02:40,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:40,106 INFO L482 AbstractCegarLoop]: Abstraction has 2807 states and 9178 transitions. [2021-06-05 16:02:40,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2807 states and 9178 transitions. [2021-06-05 16:02:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:40,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:40,110 INFO L521 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] [2021-06-05 16:02:40,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:40,325 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2017590645, now seen corresponding path program 10 times [2021-06-05 16:02:40,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:40,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687607361] [2021-06-05 16:02:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:40,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:40,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:40,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687607361] [2021-06-05 16:02:40,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687607361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:40,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820770670] [2021-06-05 16:02:40,637 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 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 [2021-06-05 16:02:40,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:40,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:02:40,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:40,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:40,839 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 64 treesize of output 52 [2021-06-05 16:02:40,841 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:40,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:40,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:40,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:40,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-06-05 16:02:40,854 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:40,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:40,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:40,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 16:02:40,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:40,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:40,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:40,883 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-06-05 16:02:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:40,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820770670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:40,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:40,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 16:02:40,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029099201] [2021-06-05 16:02:40,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:02:40,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:40,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:02:40,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:02:40,908 INFO L87 Difference]: Start difference. First operand 2807 states and 9178 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:41,808 INFO L93 Difference]: Finished difference Result 3655 states and 11758 transitions. [2021-06-05 16:02:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:02:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:41,814 INFO L225 Difference]: With dead ends: 3655 [2021-06-05 16:02:41,814 INFO L226 Difference]: Without dead ends: 3636 [2021-06-05 16:02:41,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 784.2ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 16:02:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-06-05 16:02:41,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2851. [2021-06-05 16:02:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:41,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-06-05 16:02:41,852 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-06-05 16:02:41,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:41,852 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-06-05 16:02:41,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:41,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-06-05 16:02:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:41,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:41,855 INFO L521 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] [2021-06-05 16:02:42,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:02:42,072 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash 542604875, now seen corresponding path program 11 times [2021-06-05 16:02:42,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:42,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296807202] [2021-06-05 16:02:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:42,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:42,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296807202] [2021-06-05 16:02:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296807202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:42,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197393286] [2021-06-05 16:02:42,289 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 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 [2021-06-05 16:02:42,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:02:42,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:02:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:42,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,602 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 16:02:42,602 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 202 [2021-06-05 16:02:42,622 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:42,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:42,658 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-06-05 16:02:42,658 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 169 treesize of output 140 [2021-06-05 16:02:42,702 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:42,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:42,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:42,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 91 [2021-06-05 16:02:42,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:42,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:42,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:42,819 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:245, output treesize:19 [2021-06-05 16:02:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:42,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197393286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:42,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:42,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 16:02:42,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061948869] [2021-06-05 16:02:42,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:02:42,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:42,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:02:42,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:02:42,865 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:02:58,748 INFO L93 Difference]: Finished difference Result 4431 states and 14103 transitions. [2021-06-05 16:02:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 16:02:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:02:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:02:58,755 INFO L225 Difference]: With dead ends: 4431 [2021-06-05 16:02:58,756 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 16:02:58,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 9079.7ms TimeCoverageRelationStatistics Valid=479, Invalid=2707, Unknown=6, NotChecked=0, Total=3192 [2021-06-05 16:02:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 16:02:58,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2851. [2021-06-05 16:02:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 3.2712280701754386) internal successors, (9323), 2850 states have internal predecessors, (9323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 9323 transitions. [2021-06-05 16:02:58,805 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 9323 transitions. Word has length 30 [2021-06-05 16:02:58,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:02:58,805 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 9323 transitions. [2021-06-05 16:02:58,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:02:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 9323 transitions. [2021-06-05 16:02:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:02:58,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:02:58,809 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:02:59,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 16:02:59,024 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:02:59,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:02:59,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2080396478, now seen corresponding path program 40 times [2021-06-05 16:02:59,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:02:59,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575459196] [2021-06-05 16:02:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:02:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:02:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:59,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:02:59,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575459196] [2021-06-05 16:02:59,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575459196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:59,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728930971] [2021-06-05 16:02:59,352 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 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 [2021-06-05 16:02:59,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:02:59,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:02:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:02:59,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:02:59,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:59,626 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 47 treesize of output 37 [2021-06-05 16:02:59,628 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:59,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:59,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:02:59,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:59,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:02:59,637 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 37 treesize of output 27 [2021-06-05 16:02:59,639 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:02:59,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:59,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:59,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:02:59,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:02:59,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:02:59,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:02:59,661 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:02:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:02:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728930971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:02:59,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:02:59,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 16:02:59,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443476240] [2021-06-05 16:02:59,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:02:59,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:02:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:02:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:02:59,683 INFO L87 Difference]: Start difference. First operand 2851 states and 9323 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:02,651 INFO L93 Difference]: Finished difference Result 5434 states and 16862 transitions. [2021-06-05 16:03:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 16:03:02,651 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:02,658 INFO L225 Difference]: With dead ends: 5434 [2021-06-05 16:03:02,658 INFO L226 Difference]: Without dead ends: 5404 [2021-06-05 16:03:02,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2460.1ms TimeCoverageRelationStatistics Valid=667, Invalid=3889, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:03:02,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5404 states. [2021-06-05 16:03:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5404 to 2923. [2021-06-05 16:03:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.2902121834360027) internal successors, (9614), 2922 states have internal predecessors, (9614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:02,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 9614 transitions. [2021-06-05 16:03:02,703 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 9614 transitions. Word has length 30 [2021-06-05 16:03:02,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:02,703 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 9614 transitions. [2021-06-05 16:03:02,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:02,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 9614 transitions. [2021-06-05 16:03:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:02,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:02,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:02,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 16:03:02,907 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:02,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:02,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1931199092, now seen corresponding path program 41 times [2021-06-05 16:03:02,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:02,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999870194] [2021-06-05 16:03:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:03,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:03,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999870194] [2021-06-05 16:03:03,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999870194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:03,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080482468] [2021-06-05 16:03:03,233 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 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 [2021-06-05 16:03:03,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:03:03,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:03,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:03:03,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:03,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:03,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:03,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:03,469 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 47 treesize of output 37 [2021-06-05 16:03:03,471 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:03,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:03,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:03,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:03,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:03,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:03,481 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 37 treesize of output 27 [2021-06-05 16:03:03,485 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:03,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:03,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:03,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:03:03,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:03,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:03,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:03,507 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:03:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:03,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080482468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:03,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:03,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 16:03:03,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780166731] [2021-06-05 16:03:03,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:03:03,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:03:03,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:03:03,538 INFO L87 Difference]: Start difference. First operand 2923 states and 9614 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:06,291 INFO L93 Difference]: Finished difference Result 5109 states and 16139 transitions. [2021-06-05 16:03:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:03:06,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:06,299 INFO L225 Difference]: With dead ends: 5109 [2021-06-05 16:03:06,299 INFO L226 Difference]: Without dead ends: 5079 [2021-06-05 16:03:06,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2377.5ms TimeCoverageRelationStatistics Valid=644, Invalid=3516, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:03:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5079 states. [2021-06-05 16:03:06,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5079 to 2927. [2021-06-05 16:03:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 3.2911825017088177) internal successors, (9630), 2926 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 9630 transitions. [2021-06-05 16:03:06,354 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 9630 transitions. Word has length 30 [2021-06-05 16:03:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:06,355 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 9630 transitions. [2021-06-05 16:03:06,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 9630 transitions. [2021-06-05 16:03:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:06,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:06,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:06,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 16:03:06,558 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash -590660368, now seen corresponding path program 42 times [2021-06-05 16:03:06,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:06,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571584555] [2021-06-05 16:03:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:06,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:06,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571584555] [2021-06-05 16:03:06,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571584555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:06,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818060899] [2021-06-05 16:03:06,878 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 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 [2021-06-05 16:03:06,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:03:06,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:06,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:03:06,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:07,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,109 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:03:07,109 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 193 [2021-06-05 16:03:07,183 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:07,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:07,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:07,227 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 16:03:07,227 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 195 treesize of output 175 [2021-06-05 16:03:07,375 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:07,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:07,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:07,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 163 [2021-06-05 16:03:07,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:08,174 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2021-06-05 16:03:08,175 INFO L628 ElimStorePlain]: treesize reduction 580, result has 71.1 percent of original size [2021-06-05 16:03:08,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:08,645 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:210, output treesize:34 [2021-06-05 16:03:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:08,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818060899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:08,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:08,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 24 [2021-06-05 16:03:08,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067516279] [2021-06-05 16:03:08,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:03:08,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:08,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:03:08,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:03:08,703 INFO L87 Difference]: Start difference. First operand 2927 states and 9630 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:11,404 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2021-06-05 16:03:11,675 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2021-06-05 16:03:13,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:13,215 INFO L93 Difference]: Finished difference Result 5927 states and 18549 transitions. [2021-06-05 16:03:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 16:03:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:13,224 INFO L225 Difference]: With dead ends: 5927 [2021-06-05 16:03:13,224 INFO L226 Difference]: Without dead ends: 5901 [2021-06-05 16:03:13,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 3693.4ms TimeCoverageRelationStatistics Valid=1066, Invalid=5906, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 16:03:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-05 16:03:13,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 2939. [2021-06-05 16:03:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 3.2950987066031314) internal successors, (9681), 2938 states have internal predecessors, (9681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 9681 transitions. [2021-06-05 16:03:13,277 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 9681 transitions. Word has length 30 [2021-06-05 16:03:13,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:13,277 INFO L482 AbstractCegarLoop]: Abstraction has 2939 states and 9681 transitions. [2021-06-05 16:03:13,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 9681 transitions. [2021-06-05 16:03:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:13,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:13,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:03:13,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 16:03:13,481 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1821640756, now seen corresponding path program 43 times [2021-06-05 16:03:13,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:13,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916532886] [2021-06-05 16:03:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:13,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:13,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916532886] [2021-06-05 16:03:13,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916532886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:13,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764387577] [2021-06-05 16:03:13,936 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 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 [2021-06-05 16:03:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:13,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:03:13,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:14,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:14,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:14,216 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 47 treesize of output 37 [2021-06-05 16:03:14,218 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:14,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:14,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:14,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:14,228 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 37 treesize of output 27 [2021-06-05 16:03:14,230 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:14,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:14,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:14,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:03:14,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:14,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:14,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:14,255 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-06-05 16:03:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:14,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764387577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:14,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:14,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2021-06-05 16:03:14,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951678838] [2021-06-05 16:03:14,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 16:03:14,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:14,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 16:03:14,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:03:14,322 INFO L87 Difference]: Start difference. First operand 2939 states and 9681 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:15,366 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 16:03:15,775 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 16:03:16,145 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-06-05 16:03:16,461 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-05 16:03:17,181 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-05 16:03:17,902 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-06-05 16:03:18,181 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-05 16:03:18,334 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2021-06-05 16:03:19,105 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-05 16:03:19,833 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-05 16:03:20,120 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 16:03:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:21,339 INFO L93 Difference]: Finished difference Result 4212 states and 13344 transitions. [2021-06-05 16:03:21,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 16:03:21,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:21,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:21,345 INFO L225 Difference]: With dead ends: 4212 [2021-06-05 16:03:21,345 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 16:03:21,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3116 ImplicationChecksByTransitivity, 6405.7ms TimeCoverageRelationStatistics Valid=1096, Invalid=8216, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 16:03:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 16:03:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 2933. [2021-06-05 16:03:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2932 states have (on average 3.2946793997271486) internal successors, (9660), 2932 states have internal predecessors, (9660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 9660 transitions. [2021-06-05 16:03:21,385 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 9660 transitions. Word has length 30 [2021-06-05 16:03:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:21,385 INFO L482 AbstractCegarLoop]: Abstraction has 2933 states and 9660 transitions. [2021-06-05 16:03:21,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 9660 transitions. [2021-06-05 16:03:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:21,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:21,389 INFO L521 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] [2021-06-05 16:03:21,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:21,589 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:21,589 INFO L82 PathProgramCache]: Analyzing trace with hash 2013716757, now seen corresponding path program 12 times [2021-06-05 16:03:21,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:21,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798631532] [2021-06-05 16:03:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:21,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:21,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798631532] [2021-06-05 16:03:21,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798631532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:21,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520449186] [2021-06-05 16:03:21,922 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 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 [2021-06-05 16:03:21,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:03:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:03:21,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:22,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:22,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:22,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 16:03:22,207 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:22,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:22,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:22,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:22,216 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 35 treesize of output 27 [2021-06-05 16:03:22,218 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:22,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:22,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:22,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:03:22,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:22,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:22,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:22,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:03:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:22,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520449186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:22,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:22,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:03:22,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191923386] [2021-06-05 16:03:22,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:03:22,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:22,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:03:22,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:03:22,268 INFO L87 Difference]: Start difference. First operand 2933 states and 9660 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:23,256 INFO L93 Difference]: Finished difference Result 3750 states and 12118 transitions. [2021-06-05 16:03:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:03:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:23,261 INFO L225 Difference]: With dead ends: 3750 [2021-06-05 16:03:23,262 INFO L226 Difference]: Without dead ends: 3729 [2021-06-05 16:03:23,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 965.7ms TimeCoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:03:23,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-06-05 16:03:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2917. [2021-06-05 16:03:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2917 states, 2916 states have (on average 3.2956104252400547) internal successors, (9610), 2916 states have internal predecessors, (9610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 9610 transitions. [2021-06-05 16:03:23,305 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 9610 transitions. Word has length 30 [2021-06-05 16:03:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:23,305 INFO L482 AbstractCegarLoop]: Abstraction has 2917 states and 9610 transitions. [2021-06-05 16:03:23,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 9610 transitions. [2021-06-05 16:03:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:23,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:23,309 INFO L521 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] [2021-06-05 16:03:23,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:23,524 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1930394863, now seen corresponding path program 13 times [2021-06-05 16:03:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:23,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935072027] [2021-06-05 16:03:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:23,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:23,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935072027] [2021-06-05 16:03:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935072027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:23,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541155482] [2021-06-05 16:03:23,801 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 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 [2021-06-05 16:03:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:23,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:03:23,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:24,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:24,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:03:24,025 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:24,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:24,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:24,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:24,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:03:24,069 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:24,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:24,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:24,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:03:24,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:03:24,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:24,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:24,160 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 16:03:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:24,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541155482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:24,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:24,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:03:24,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344181063] [2021-06-05 16:03:24,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:24,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:24,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:24,201 INFO L87 Difference]: Start difference. First operand 2917 states and 9610 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:25,049 INFO L93 Difference]: Finished difference Result 4226 states and 13598 transitions. [2021-06-05 16:03:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:03:25,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:25,055 INFO L225 Difference]: With dead ends: 4226 [2021-06-05 16:03:25,055 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 16:03:25,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:03:25,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 16:03:25,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2911. [2021-06-05 16:03:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 3.293127147766323) internal successors, (9583), 2910 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 9583 transitions. [2021-06-05 16:03:25,099 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 9583 transitions. Word has length 30 [2021-06-05 16:03:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:25,099 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 9583 transitions. [2021-06-05 16:03:25,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:25,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 9583 transitions. [2021-06-05 16:03:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:25,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:25,102 INFO L521 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] [2021-06-05 16:03:25,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:25,304 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2003474667, now seen corresponding path program 14 times [2021-06-05 16:03:25,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:25,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970277729] [2021-06-05 16:03:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:25,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:25,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970277729] [2021-06-05 16:03:25,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970277729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:25,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076978116] [2021-06-05 16:03:25,616 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 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 [2021-06-05 16:03:25,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:03:25,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:25,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:03:25,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:25,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:25,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:25,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:03:25,809 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:25,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:25,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:25,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:25,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:03:25,845 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:25,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:25,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:25,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:03:25,880 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:03:25,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:25,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:25,935 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:45 [2021-06-05 16:03:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:26,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076978116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:26,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:26,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:03:26,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351369135] [2021-06-05 16:03:26,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:03:26,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:03:26,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:03:26,004 INFO L87 Difference]: Start difference. First operand 2911 states and 9583 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:26,759 INFO L93 Difference]: Finished difference Result 3882 states and 12615 transitions. [2021-06-05 16:03:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:03:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:26,765 INFO L225 Difference]: With dead ends: 3882 [2021-06-05 16:03:26,765 INFO L226 Difference]: Without dead ends: 3857 [2021-06-05 16:03:26,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 678.1ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 16:03:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3857 states. [2021-06-05 16:03:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3857 to 2911. [2021-06-05 16:03:26,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 3.293127147766323) internal successors, (9583), 2910 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 9583 transitions. [2021-06-05 16:03:26,805 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 9583 transitions. Word has length 30 [2021-06-05 16:03:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:26,806 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 9583 transitions. [2021-06-05 16:03:26,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 9583 transitions. [2021-06-05 16:03:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:26,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:26,809 INFO L521 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] [2021-06-05 16:03:27,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:27,009 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:27,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1024051753, now seen corresponding path program 15 times [2021-06-05 16:03:27,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:27,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400887994] [2021-06-05 16:03:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:27,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:27,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400887994] [2021-06-05 16:03:27,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400887994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:27,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151885140] [2021-06-05 16:03:27,276 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 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 [2021-06-05 16:03:27,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:03:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:03:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:29,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:29,236 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 43 treesize of output 59 [2021-06-05 16:03:29,343 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:29,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:29,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:29,374 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 35 treesize of output 51 [2021-06-05 16:03:29,457 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:29,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:29,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:29,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:03:29,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:03:29,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:29,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:29,669 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:432 [2021-06-05 16:03:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:29,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151885140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:29,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:29,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 16:03:29,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544640652] [2021-06-05 16:03:29,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:03:29,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:29,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:03:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=437, Unknown=2, NotChecked=0, Total=506 [2021-06-05 16:03:29,905 INFO L87 Difference]: Start difference. First operand 2911 states and 9583 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) [2021-06-05 16:03:42,707 WARN L205 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 16:03:54,551 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 16:03:57,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:57,034 INFO L93 Difference]: Finished difference Result 3863 states and 12412 transitions. [2021-06-05 16:03:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 16:03:57,034 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 30 [2021-06-05 16:03:57,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:57,039 INFO L225 Difference]: With dead ends: 3863 [2021-06-05 16:03:57,040 INFO L226 Difference]: Without dead ends: 3848 [2021-06-05 16:03:57,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 17028.2ms TimeCoverageRelationStatistics Valid=393, Invalid=2459, Unknown=10, NotChecked=0, Total=2862 [2021-06-05 16:03:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-05 16:03:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 2911. [2021-06-05 16:03:57,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2911 states, 2910 states have (on average 3.293127147766323) internal successors, (9583), 2910 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:57,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2911 states to 2911 states and 9583 transitions. [2021-06-05 16:03:57,076 INFO L78 Accepts]: Start accepts. Automaton has 2911 states and 9583 transitions. Word has length 30 [2021-06-05 16:03:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:57,076 INFO L482 AbstractCegarLoop]: Abstraction has 2911 states and 9583 transitions. [2021-06-05 16:03:57,076 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) [2021-06-05 16:03:57,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2911 states and 9583 transitions. [2021-06-05 16:03:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:57,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:57,079 INFO L521 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] [2021-06-05 16:03:57,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 16:03:57,293 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:57,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash -443321315, now seen corresponding path program 16 times [2021-06-05 16:03:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:57,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624494355] [2021-06-05 16:03:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:57,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:57,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624494355] [2021-06-05 16:03:57,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624494355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:57,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628326687] [2021-06-05 16:03:57,571 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 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 [2021-06-05 16:03:57,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:03:57,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:57,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:03:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:57,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:57,786 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 43 treesize of output 35 [2021-06-05 16:03:57,789 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:57,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:57,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:57,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:57,798 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 35 treesize of output 27 [2021-06-05 16:03:57,800 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:57,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:57,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:57,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:03:57,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:57,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:57,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:57,827 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:03:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:57,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628326687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:57,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:57,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:03:57,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398373132] [2021-06-05 16:03:57,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:03:57,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:03:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:03:57,848 INFO L87 Difference]: Start difference. First operand 2911 states and 9583 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:03:58,641 INFO L93 Difference]: Finished difference Result 3638 states and 11805 transitions. [2021-06-05 16:03:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 16:03:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 30 [2021-06-05 16:03:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:03:58,647 INFO L225 Difference]: With dead ends: 3638 [2021-06-05 16:03:58,647 INFO L226 Difference]: Without dead ends: 3623 [2021-06-05 16:03:58,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 829.3ms TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 16:03:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-06-05 16:03:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 2923. [2021-06-05 16:03:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.292950034223135) internal successors, (9622), 2922 states have internal predecessors, (9622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 9622 transitions. [2021-06-05 16:03:58,685 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 9622 transitions. Word has length 30 [2021-06-05 16:03:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:03:58,685 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 9622 transitions. [2021-06-05 16:03:58,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:03:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 9622 transitions. [2021-06-05 16:03:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:03:58,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:03:58,688 INFO L521 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] [2021-06-05 16:03:58,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:03:58,889 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:03:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:03:58,889 INFO L82 PathProgramCache]: Analyzing trace with hash -61843775, now seen corresponding path program 17 times [2021-06-05 16:03:58,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:03:58,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141557649] [2021-06-05 16:03:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:03:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:03:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:59,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:03:59,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141557649] [2021-06-05 16:03:59,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141557649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:59,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136665828] [2021-06-05 16:03:59,163 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 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 [2021-06-05 16:03:59,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:03:59,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:03:59,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:03:59,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:03:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:59,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:59,410 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 43 treesize of output 35 [2021-06-05 16:03:59,412 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:59,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:59,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:03:59,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:03:59,421 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 35 treesize of output 27 [2021-06-05 16:03:59,423 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:03:59,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:59,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:59,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:03:59,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:03:59,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:03:59,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:03:59,444 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:03:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:03:59,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136665828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:03:59,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:03:59,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 16:03:59,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60064247] [2021-06-05 16:03:59,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:03:59,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:03:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:03:59,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:03:59,460 INFO L87 Difference]: Start difference. First operand 2923 states and 9622 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-06-05 16:04:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:01,251 INFO L93 Difference]: Finished difference Result 3751 states and 12098 transitions. [2021-06-05 16:04:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:04:01,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 30 [2021-06-05 16:04:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:01,257 INFO L225 Difference]: With dead ends: 3751 [2021-06-05 16:04:01,257 INFO L226 Difference]: Without dead ends: 3736 [2021-06-05 16:04:01,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1488.9ms TimeCoverageRelationStatistics Valid=318, Invalid=2034, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 16:04:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-05 16:04:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 2932. [2021-06-05 16:04:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 3.295121119071989) internal successors, (9658), 2931 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:01,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 9658 transitions. [2021-06-05 16:04:01,300 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 9658 transitions. Word has length 30 [2021-06-05 16:04:01,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:01,301 INFO L482 AbstractCegarLoop]: Abstraction has 2932 states and 9658 transitions. [2021-06-05 16:04:01,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-06-05 16:04:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 9658 transitions. [2021-06-05 16:04:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:01,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:01,304 INFO L521 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] [2021-06-05 16:04:01,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 16:04:01,517 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash -130920821, now seen corresponding path program 18 times [2021-06-05 16:04:01,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:01,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916013108] [2021-06-05 16:04:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:01,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:01,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916013108] [2021-06-05 16:04:01,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916013108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:01,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27725523] [2021-06-05 16:04:01,825 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 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 [2021-06-05 16:04:01,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:04:01,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:01,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:04:01,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:02,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,113 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:04:02,162 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:02,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:04:02,229 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:02,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:02,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:02,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:02,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:02,356 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:52, output treesize:87 [2021-06-05 16:04:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:02,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27725523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:02,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:02,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 25 [2021-06-05 16:04:02,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772116852] [2021-06-05 16:04:02,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:04:02,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:02,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:04:02,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:04:02,491 INFO L87 Difference]: Start difference. First operand 2932 states and 9658 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:05,005 INFO L93 Difference]: Finished difference Result 4090 states and 13122 transitions. [2021-06-05 16:04:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 16:04:05,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:05,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:05,011 INFO L225 Difference]: With dead ends: 4090 [2021-06-05 16:04:05,011 INFO L226 Difference]: Without dead ends: 4056 [2021-06-05 16:04:05,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 2187.5ms TimeCoverageRelationStatistics Valid=400, Invalid=3760, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 16:04:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2021-06-05 16:04:05,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 2980. [2021-06-05 16:04:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2979 states have (on average 3.300100704934542) internal successors, (9831), 2979 states have internal predecessors, (9831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 9831 transitions. [2021-06-05 16:04:05,050 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 9831 transitions. Word has length 30 [2021-06-05 16:04:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:05,050 INFO L482 AbstractCegarLoop]: Abstraction has 2980 states and 9831 transitions. [2021-06-05 16:04:05,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 9831 transitions. [2021-06-05 16:04:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:05,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:05,053 INFO L521 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] [2021-06-05 16:04:05,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:05,254 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:05,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:05,254 INFO L82 PathProgramCache]: Analyzing trace with hash 343355019, now seen corresponding path program 19 times [2021-06-05 16:04:05,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:05,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046593760] [2021-06-05 16:04:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:05,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:05,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046593760] [2021-06-05 16:04:05,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046593760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:05,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60739098] [2021-06-05 16:04:05,506 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 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 [2021-06-05 16:04:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:04:05,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:05,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:05,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:05,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:04:05,740 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:05,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:05,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:05,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:05,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:04:05,775 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:05,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:05,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:05,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:05,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:05,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:05,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:05,858 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:40 [2021-06-05 16:04:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:05,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60739098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:05,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:05,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:04:05,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447293609] [2021-06-05 16:04:05,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:04:05,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:05,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:04:05,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:04:05,897 INFO L87 Difference]: Start difference. First operand 2980 states and 9831 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:07,111 INFO L93 Difference]: Finished difference Result 4306 states and 13882 transitions. [2021-06-05 16:04:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 16:04:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:07,118 INFO L225 Difference]: With dead ends: 4306 [2021-06-05 16:04:07,118 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 16:04:07,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1061.1ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:04:07,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 16:04:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 2974. [2021-06-05 16:04:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2973 states have (on average 3.2976791120080726) internal successors, (9804), 2973 states have internal predecessors, (9804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 9804 transitions. [2021-06-05 16:04:07,161 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 9804 transitions. Word has length 30 [2021-06-05 16:04:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:07,161 INFO L482 AbstractCegarLoop]: Abstraction has 2974 states and 9804 transitions. [2021-06-05 16:04:07,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 9804 transitions. [2021-06-05 16:04:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:07,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:07,165 INFO L521 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] [2021-06-05 16:04:07,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:07,365 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash 968970827, now seen corresponding path program 20 times [2021-06-05 16:04:07,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:07,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568434404] [2021-06-05 16:04:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:07,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568434404] [2021-06-05 16:04:07,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568434404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653016697] [2021-06-05 16:04:07,665 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 16:04:07,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:04:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:04:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:07,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:07,912 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:04:07,955 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:07,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:07,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:07,987 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:04:08,025 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:08,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:08,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:08,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:08,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:08,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:08,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:08,208 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:375 [2021-06-05 16:04:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:08,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653016697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:08,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:08,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 16:04:08,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848914482] [2021-06-05 16:04:08,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:04:08,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:04:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:04:08,382 INFO L87 Difference]: Start difference. First operand 2974 states and 9804 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:11,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:11,604 INFO L93 Difference]: Finished difference Result 4828 states and 15336 transitions. [2021-06-05 16:04:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 16:04:11,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:11,611 INFO L225 Difference]: With dead ends: 4828 [2021-06-05 16:04:11,611 INFO L226 Difference]: Without dead ends: 4794 [2021-06-05 16:04:11,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 2748.7ms TimeCoverageRelationStatistics Valid=560, Invalid=3996, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 16:04:11,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4794 states. [2021-06-05 16:04:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4794 to 2996. [2021-06-05 16:04:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 2995 states have (on average 3.306176961602671) internal successors, (9902), 2995 states have internal predecessors, (9902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 9902 transitions. [2021-06-05 16:04:11,659 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 9902 transitions. Word has length 30 [2021-06-05 16:04:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:11,659 INFO L482 AbstractCegarLoop]: Abstraction has 2996 states and 9902 transitions. [2021-06-05 16:04:11,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:11,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 9902 transitions. [2021-06-05 16:04:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:11,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:11,662 INFO L521 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] [2021-06-05 16:04:11,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:11,863 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1714349001, now seen corresponding path program 21 times [2021-06-05 16:04:11,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:11,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653257229] [2021-06-05 16:04:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:12,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:12,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653257229] [2021-06-05 16:04:12,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653257229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:12,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118803081] [2021-06-05 16:04:12,113 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 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 [2021-06-05 16:04:12,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:04:12,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:12,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:04:12,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:13,526 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 16:04:13,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:13,581 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 43 treesize of output 59 [2021-06-05 16:04:13,656 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:13,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:13,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:13,692 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 35 treesize of output 51 [2021-06-05 16:04:13,768 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:13,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:13,820 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:13,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:13,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:13,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:14,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 10 xjuncts. [2021-06-05 16:04:14,047 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:465 [2021-06-05 16:04:14,362 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-06-05 16:04:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:14,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118803081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:14,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:14,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 16:04:14,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894609436] [2021-06-05 16:04:14,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:04:14,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:14,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:04:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:04:14,495 INFO L87 Difference]: Start difference. First operand 2996 states and 9902 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:17,645 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 47 [2021-06-05 16:04:18,598 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2021-06-05 16:04:21,530 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-06-05 16:04:21,798 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 62 [2021-06-05 16:04:21,935 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 59 [2021-06-05 16:04:22,226 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2021-06-05 16:04:22,811 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 56 [2021-06-05 16:04:25,837 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-06-05 16:04:28,243 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-06-05 16:04:30,176 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-05 16:04:32,925 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 16:04:36,627 WARN L205 SmtUtils]: Spent 2.55 s on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-05 16:04:39,957 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-06-05 16:04:42,802 WARN L205 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 16:04:45,520 WARN L205 SmtUtils]: Spent 2.70 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 16:04:45,724 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2021-06-05 16:04:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:45,995 INFO L93 Difference]: Finished difference Result 4811 states and 15316 transitions. [2021-06-05 16:04:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:04:45,996 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:46,003 INFO L225 Difference]: With dead ends: 4811 [2021-06-05 16:04:46,003 INFO L226 Difference]: Without dead ends: 4781 [2021-06-05 16:04:46,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 24641.8ms TimeCoverageRelationStatistics Valid=758, Invalid=3657, Unknown=7, NotChecked=0, Total=4422 [2021-06-05 16:04:46,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2021-06-05 16:04:46,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 2989. [2021-06-05 16:04:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2988 states have (on average 3.3032128514056227) internal successors, (9870), 2988 states have internal predecessors, (9870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 9870 transitions. [2021-06-05 16:04:46,053 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 9870 transitions. Word has length 30 [2021-06-05 16:04:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:46,053 INFO L482 AbstractCegarLoop]: Abstraction has 2989 states and 9870 transitions. [2021-06-05 16:04:46,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 9870 transitions. [2021-06-05 16:04:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:46,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:46,057 INFO L521 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] [2021-06-05 16:04:46,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:46,257 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:46,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:46,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1723241239, now seen corresponding path program 22 times [2021-06-05 16:04:46,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:46,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928301063] [2021-06-05 16:04:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:46,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:46,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:46,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928301063] [2021-06-05 16:04:46,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928301063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:46,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876919630] [2021-06-05 16:04:46,594 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 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 [2021-06-05 16:04:46,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:04:46,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:04:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:46,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:46,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:46,805 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 43 treesize of output 35 [2021-06-05 16:04:46,807 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:46,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:46,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:46,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:46,815 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 35 treesize of output 27 [2021-06-05 16:04:46,816 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:46,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:46,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:46,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:04:46,828 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:46,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:46,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:46,837 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:04:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:46,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876919630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:46,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:46,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:04:46,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858790175] [2021-06-05 16:04:46,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:04:46,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:46,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:04:46,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:04:46,856 INFO L87 Difference]: Start difference. First operand 2989 states and 9870 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:47,938 INFO L93 Difference]: Finished difference Result 3818 states and 12364 transitions. [2021-06-05 16:04:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:04:47,939 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:47,944 INFO L225 Difference]: With dead ends: 3818 [2021-06-05 16:04:47,944 INFO L226 Difference]: Without dead ends: 3797 [2021-06-05 16:04:47,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 996.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1258, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 16:04:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-05 16:04:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 2965. [2021-06-05 16:04:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.306005398110661) internal successors, (9799), 2964 states have internal predecessors, (9799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 9799 transitions. [2021-06-05 16:04:47,982 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 9799 transitions. Word has length 30 [2021-06-05 16:04:47,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:47,982 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 9799 transitions. [2021-06-05 16:04:47,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:47,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 9799 transitions. [2021-06-05 16:04:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:47,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:47,985 INFO L521 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] [2021-06-05 16:04:48,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable708 [2021-06-05 16:04:48,186 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1639919345, now seen corresponding path program 23 times [2021-06-05 16:04:48,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:48,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689131240] [2021-06-05 16:04:48,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:48,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689131240] [2021-06-05 16:04:48,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689131240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:48,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466327070] [2021-06-05 16:04:48,447 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 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 [2021-06-05 16:04:48,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:04:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:04:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:48,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:48,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:04:48,705 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:48,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:48,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:48,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:48,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:04:48,739 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:48,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:48,773 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:48,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:48,784 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:48,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:48,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:48,843 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-05 16:04:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:48,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466327070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:48,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:48,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 16:04:48,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836450779] [2021-06-05 16:04:48,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:04:48,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:48,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:04:48,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:04:48,888 INFO L87 Difference]: Start difference. First operand 2965 states and 9799 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:50,635 INFO L93 Difference]: Finished difference Result 4461 states and 14298 transitions. [2021-06-05 16:04:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 16:04:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:50,641 INFO L225 Difference]: With dead ends: 4461 [2021-06-05 16:04:50,641 INFO L226 Difference]: Without dead ends: 4421 [2021-06-05 16:04:50,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 1444.9ms TimeCoverageRelationStatistics Valid=398, Invalid=2358, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:04:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2021-06-05 16:04:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 2956. [2021-06-05 16:04:50,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 3.301861252115059) internal successors, (9757), 2955 states have internal predecessors, (9757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9757 transitions. [2021-06-05 16:04:50,700 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9757 transitions. Word has length 30 [2021-06-05 16:04:50,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:50,700 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 9757 transitions. [2021-06-05 16:04:50,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9757 transitions. [2021-06-05 16:04:50,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:50,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:50,704 INFO L521 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] [2021-06-05 16:04:50,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:50,904 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2001017111, now seen corresponding path program 24 times [2021-06-05 16:04:50,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:50,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820789366] [2021-06-05 16:04:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:51,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:51,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820789366] [2021-06-05 16:04:51,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820789366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:51,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538747507] [2021-06-05 16:04:51,196 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 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 [2021-06-05 16:04:51,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:04:51,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:04:51,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:51,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:51,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:04:51,390 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:51,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:51,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:51,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:04:51,436 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:51,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:51,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:51,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:51,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:51,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:51,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:51,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:28 [2021-06-05 16:04:51,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:51,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538747507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:51,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:51,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:04:51,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104776816] [2021-06-05 16:04:51,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:04:51,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:04:51,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:04:51,599 INFO L87 Difference]: Start difference. First operand 2956 states and 9757 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:52,328 INFO L93 Difference]: Finished difference Result 4046 states and 13143 transitions. [2021-06-05 16:04:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:04:52,328 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:52,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:52,334 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 16:04:52,334 INFO L226 Difference]: Without dead ends: 4021 [2021-06-05 16:04:52,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:04:52,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-06-05 16:04:52,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 2950. [2021-06-05 16:04:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 3.3014581213970837) internal successors, (9736), 2949 states have internal predecessors, (9736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 9736 transitions. [2021-06-05 16:04:52,372 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 9736 transitions. Word has length 30 [2021-06-05 16:04:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:52,372 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 9736 transitions. [2021-06-05 16:04:52,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 9736 transitions. [2021-06-05 16:04:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:52,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:52,375 INFO L521 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] [2021-06-05 16:04:52,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:52,576 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:52,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1235319329, now seen corresponding path program 25 times [2021-06-05 16:04:52,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:52,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151722826] [2021-06-05 16:04:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:52,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:52,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151722826] [2021-06-05 16:04:52,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151722826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:52,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813059109] [2021-06-05 16:04:52,875 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 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 [2021-06-05 16:04:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:04:52,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:53,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:53,112 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 43 treesize of output 35 [2021-06-05 16:04:53,113 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:53,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:53,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:53,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:04:53,121 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 35 treesize of output 27 [2021-06-05 16:04:53,132 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:53,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:53,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:53,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:04:53,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:04:53,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:53,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:53,156 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:04:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:53,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813059109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:53,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:53,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:04:53,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641536512] [2021-06-05 16:04:53,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:04:53,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:53,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:04:53,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:04:53,174 INFO L87 Difference]: Start difference. First operand 2950 states and 9736 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:53,932 INFO L93 Difference]: Finished difference Result 3730 states and 12134 transitions. [2021-06-05 16:04:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 16:04:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:53,937 INFO L225 Difference]: With dead ends: 3730 [2021-06-05 16:04:53,937 INFO L226 Difference]: Without dead ends: 3715 [2021-06-05 16:04:53,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 846.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 16:04:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2021-06-05 16:04:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 2961. [2021-06-05 16:04:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2961 states, 2960 states have (on average 3.3027027027027027) internal successors, (9776), 2960 states have internal predecessors, (9776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2961 states to 2961 states and 9776 transitions. [2021-06-05 16:04:53,972 INFO L78 Accepts]: Start accepts. Automaton has 2961 states and 9776 transitions. Word has length 30 [2021-06-05 16:04:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:53,972 INFO L482 AbstractCegarLoop]: Abstraction has 2961 states and 9776 transitions. [2021-06-05 16:04:53,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2961 states and 9776 transitions. [2021-06-05 16:04:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:53,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:53,975 INFO L521 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] [2021-06-05 16:04:54,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-06-05 16:04:54,185 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:54,185 INFO L82 PathProgramCache]: Analyzing trace with hash 570228807, now seen corresponding path program 26 times [2021-06-05 16:04:54,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:54,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843551823] [2021-06-05 16:04:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:54,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:54,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843551823] [2021-06-05 16:04:54,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843551823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:54,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192291687] [2021-06-05 16:04:54,499 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:54,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:04:54,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:04:54,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:54,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:54,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2021-06-05 16:04:54,718 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:54,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:04:54,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:54,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-06-05 16:04:54,752 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:54,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:54,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:54,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:54,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:54,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:54,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:54,841 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:26 [2021-06-05 16:04:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:54,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192291687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:54,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:54,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:04:54,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207943989] [2021-06-05 16:04:54,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:04:54,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:04:54,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:04:54,888 INFO L87 Difference]: Start difference. First operand 2961 states and 9776 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:04:55,951 INFO L93 Difference]: Finished difference Result 4237 states and 13721 transitions. [2021-06-05 16:04:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 16:04:55,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-06-05 16:04:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:04:55,957 INFO L225 Difference]: With dead ends: 4237 [2021-06-05 16:04:55,957 INFO L226 Difference]: Without dead ends: 4218 [2021-06-05 16:04:55,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1062.5ms TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:04:55,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-06-05 16:04:55,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 2954. [2021-06-05 16:04:55,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 3.301049779884863) internal successors, (9748), 2953 states have internal predecessors, (9748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 9748 transitions. [2021-06-05 16:04:55,998 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 9748 transitions. Word has length 30 [2021-06-05 16:04:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:04:55,998 INFO L482 AbstractCegarLoop]: Abstraction has 2954 states and 9748 transitions. [2021-06-05 16:04:55,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 9748 transitions. [2021-06-05 16:04:56,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:04:56,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:04:56,001 INFO L521 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] [2021-06-05 16:04:56,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:56,202 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:04:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:04:56,202 INFO L82 PathProgramCache]: Analyzing trace with hash -66238047, now seen corresponding path program 27 times [2021-06-05 16:04:56,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:04:56,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743432458] [2021-06-05 16:04:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:04:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:04:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:56,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:04:56,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743432458] [2021-06-05 16:04:56,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743432458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:56,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838661107] [2021-06-05 16:04:56,511 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:04:56,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:04:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:04:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:04:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:04:56,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:56,702 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 43 treesize of output 59 [2021-06-05 16:04:56,768 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:56,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:56,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:56,802 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 35 treesize of output 51 [2021-06-05 16:04:56,873 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:04:56,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:56,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:56,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:04:56,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:04:57,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:04:57,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:04:57,122 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:496 [2021-06-05 16:04:57,380 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-06-05 16:04:57,581 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 16:04:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:04:57,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838661107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:04:57,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:04:57,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 16:04:57,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70281728] [2021-06-05 16:04:57,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:04:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:04:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:04:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:04:57,722 INFO L87 Difference]: Start difference. First operand 2954 states and 9748 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:04:58,078 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2021-06-05 16:04:58,593 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 54 [2021-06-05 16:04:58,773 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2021-06-05 16:04:59,010 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 54 [2021-06-05 16:04:59,425 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 16:04:59,773 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 37 [2021-06-05 16:04:59,972 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-06-05 16:05:00,199 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2021-06-05 16:05:00,817 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-06-05 16:05:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:01,207 INFO L93 Difference]: Finished difference Result 4498 states and 14538 transitions. [2021-06-05 16:05:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:05:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:01,214 INFO L225 Difference]: With dead ends: 4498 [2021-06-05 16:05:01,214 INFO L226 Difference]: Without dead ends: 4448 [2021-06-05 16:05:01,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 3610.2ms TimeCoverageRelationStatistics Valid=544, Invalid=2648, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:05:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2021-06-05 16:05:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 2943. [2021-06-05 16:05:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 3.299116247450714) internal successors, (9706), 2942 states have internal predecessors, (9706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 9706 transitions. [2021-06-05 16:05:01,257 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 9706 transitions. Word has length 30 [2021-06-05 16:05:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:01,257 INFO L482 AbstractCegarLoop]: Abstraction has 2943 states and 9706 transitions. [2021-06-05 16:05:01,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 9706 transitions. [2021-06-05 16:05:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:01,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:01,260 INFO L521 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] [2021-06-05 16:05:01,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-05 16:05:01,461 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1927255107, now seen corresponding path program 28 times [2021-06-05 16:05:01,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:01,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346440330] [2021-06-05 16:05:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:01,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346440330] [2021-06-05 16:05:01,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346440330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:01,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418981118] [2021-06-05 16:05:01,777 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:01,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:05:01,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:01,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:01,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:02,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:02,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:02,004 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 43 treesize of output 35 [2021-06-05 16:05:02,006 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:02,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:02,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:02,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:02,015 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 35 treesize of output 27 [2021-06-05 16:05:02,018 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:02,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:02,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:02,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:05:02,031 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:02,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:02,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:02,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:05:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:02,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418981118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:02,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:02,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:05:02,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248219478] [2021-06-05 16:05:02,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:05:02,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:05:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:05:02,057 INFO L87 Difference]: Start difference. First operand 2943 states and 9706 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:03,074 INFO L93 Difference]: Finished difference Result 3834 states and 12416 transitions. [2021-06-05 16:05:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:05:03,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:03,080 INFO L225 Difference]: With dead ends: 3834 [2021-06-05 16:05:03,080 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 16:05:03,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1034.0ms TimeCoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:05:03,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 16:05:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 2994. [2021-06-05 16:05:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2994 states, 2993 states have (on average 3.2980287337119947) internal successors, (9871), 2993 states have internal predecessors, (9871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:03,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 9871 transitions. [2021-06-05 16:05:03,116 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 9871 transitions. Word has length 30 [2021-06-05 16:05:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:03,117 INFO L482 AbstractCegarLoop]: Abstraction has 2994 states and 9871 transitions. [2021-06-05 16:05:03,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 9871 transitions. [2021-06-05 16:05:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:03,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:03,120 INFO L521 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] [2021-06-05 16:05:03,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 16:05:03,320 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash 212715463, now seen corresponding path program 29 times [2021-06-05 16:05:03,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:03,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940324467] [2021-06-05 16:05:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:03,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:03,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940324467] [2021-06-05 16:05:03,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940324467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:03,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191843152] [2021-06-05 16:05:03,658 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:03,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:05:03,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:03,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:05:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:03,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:03,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:03,884 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 64 treesize of output 52 [2021-06-05 16:05:03,886 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:03,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:03,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:03,896 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 52 treesize of output 40 [2021-06-05 16:05:03,897 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:03,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:03,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:03,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 16:05:03,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:03,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:03,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:03,921 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:70, output treesize:7 [2021-06-05 16:05:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:03,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191843152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:03,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:03,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-06-05 16:05:03,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014220861] [2021-06-05 16:05:03,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 16:05:03,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:03,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 16:05:03,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 16:05:03,942 INFO L87 Difference]: Start difference. First operand 2994 states and 9871 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:04,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:04,648 INFO L93 Difference]: Finished difference Result 3779 states and 12292 transitions. [2021-06-05 16:05:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 16:05:04,648 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:04,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:04,653 INFO L225 Difference]: With dead ends: 3779 [2021-06-05 16:05:04,653 INFO L226 Difference]: Without dead ends: 3760 [2021-06-05 16:05:04,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 725.4ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 16:05:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-06-05 16:05:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3006. [2021-06-05 16:05:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.302828618968386) internal successors, (9925), 3005 states have internal predecessors, (9925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 9925 transitions. [2021-06-05 16:05:04,692 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 9925 transitions. Word has length 30 [2021-06-05 16:05:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:04,692 INFO L482 AbstractCegarLoop]: Abstraction has 3006 states and 9925 transitions. [2021-06-05 16:05:04,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 9925 transitions. [2021-06-05 16:05:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:04,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:04,695 INFO L521 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] [2021-06-05 16:05:04,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-06-05 16:05:04,896 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1522056313, now seen corresponding path program 30 times [2021-06-05 16:05:04,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:04,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800511070] [2021-06-05 16:05:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:05,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:05,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800511070] [2021-06-05 16:05:05,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800511070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:05,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041952267] [2021-06-05 16:05:05,159 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:05,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:05:05,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:05,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:05,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:05,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:05,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:05:05,384 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:05,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:05,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:05,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:05,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:05:05,443 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:05,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:05,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:05,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:05:05,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:05,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:05,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:05,548 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 16:05:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:05,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041952267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:05,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:05,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 16:05:05,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043270820] [2021-06-05 16:05:05,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 16:05:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:05,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 16:05:05,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 16:05:05,596 INFO L87 Difference]: Start difference. First operand 3006 states and 9925 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:06,536 INFO L93 Difference]: Finished difference Result 4531 states and 14555 transitions. [2021-06-05 16:05:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 16:05:06,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:06,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:06,543 INFO L225 Difference]: With dead ends: 4531 [2021-06-05 16:05:06,543 INFO L226 Difference]: Without dead ends: 4481 [2021-06-05 16:05:06,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 898.3ms TimeCoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 16:05:06,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4481 states. [2021-06-05 16:05:06,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4481 to 2986. [2021-06-05 16:05:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 3.295812395309883) internal successors, (9838), 2985 states have internal predecessors, (9838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 9838 transitions. [2021-06-05 16:05:06,591 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 9838 transitions. Word has length 30 [2021-06-05 16:05:06,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:06,591 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 9838 transitions. [2021-06-05 16:05:06,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:06,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 9838 transitions. [2021-06-05 16:05:06,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:06,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:06,594 INFO L521 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] [2021-06-05 16:05:06,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable873 [2021-06-05 16:05:06,795 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:06,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:06,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1160958547, now seen corresponding path program 31 times [2021-06-05 16:05:06,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:06,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352185031] [2021-06-05 16:05:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:07,015 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-06-05 16:05:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:07,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:07,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352185031] [2021-06-05 16:05:07,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352185031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:07,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932681074] [2021-06-05 16:05:07,186 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:07,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:07,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:07,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:07,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:07,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:07,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:07,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:05:07,389 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:07,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:07,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:07,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:07,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:07,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:07,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:07,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 16:05:07,428 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:07,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:07,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:07,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:05:07,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:07,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:07,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:07,520 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:75 [2021-06-05 16:05:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:07,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932681074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:07,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:07,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:05:07,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29956461] [2021-06-05 16:05:07,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:05:07,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:05:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:05:07,592 INFO L87 Difference]: Start difference. First operand 2986 states and 9838 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:08,474 INFO L93 Difference]: Finished difference Result 4047 states and 13136 transitions. [2021-06-05 16:05:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:05:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:08,479 INFO L225 Difference]: With dead ends: 4047 [2021-06-05 16:05:08,479 INFO L226 Difference]: Without dead ends: 4022 [2021-06-05 16:05:08,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 908.0ms TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 16:05:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2021-06-05 16:05:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 2967. [2021-06-05 16:05:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2966 states have (on average 3.296695886716116) internal successors, (9778), 2966 states have internal predecessors, (9778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:08,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 9778 transitions. [2021-06-05 16:05:08,517 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 9778 transitions. Word has length 30 [2021-06-05 16:05:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:08,517 INFO L482 AbstractCegarLoop]: Abstraction has 2967 states and 9778 transitions. [2021-06-05 16:05:08,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 9778 transitions. [2021-06-05 16:05:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:08,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:08,520 INFO L521 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] [2021-06-05 16:05:08,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable892 [2021-06-05 16:05:08,722 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1357407609, now seen corresponding path program 32 times [2021-06-05 16:05:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:08,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152832456] [2021-06-05 16:05:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:09,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152832456] [2021-06-05 16:05:09,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152832456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:09,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396010141] [2021-06-05 16:05:09,037 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:09,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:05:09,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:09,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:05:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:09,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:09,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:09,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 16:05:09,280 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:09,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:09,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:09,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-06-05 16:05:09,316 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:09,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:09,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:09,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 16:05:09,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:09,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:09,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:09,415 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:68, output treesize:17 [2021-06-05 16:05:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:09,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396010141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:09,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:09,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 16:05:09,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242069269] [2021-06-05 16:05:09,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:05:09,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:09,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:05:09,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:05:09,478 INFO L87 Difference]: Start difference. First operand 2967 states and 9778 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:17,905 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 16:05:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:23,886 INFO L93 Difference]: Finished difference Result 3457 states and 11272 transitions. [2021-06-05 16:05:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 16:05:23,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:23,891 INFO L225 Difference]: With dead ends: 3457 [2021-06-05 16:05:23,891 INFO L226 Difference]: Without dead ends: 3428 [2021-06-05 16:05:23,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 8691.5ms TimeCoverageRelationStatistics Valid=185, Invalid=1293, Unknown=4, NotChecked=0, Total=1482 [2021-06-05 16:05:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3428 states. [2021-06-05 16:05:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3428 to 2991. [2021-06-05 16:05:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2990 states have (on average 3.296989966555184) internal successors, (9858), 2990 states have internal predecessors, (9858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 9858 transitions. [2021-06-05 16:05:23,927 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 9858 transitions. Word has length 30 [2021-06-05 16:05:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:23,927 INFO L482 AbstractCegarLoop]: Abstraction has 2991 states and 9858 transitions. [2021-06-05 16:05:23,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 9858 transitions. [2021-06-05 16:05:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:23,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:23,930 INFO L521 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] [2021-06-05 16:05:24,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:24,131 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:24,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:24,131 INFO L82 PathProgramCache]: Analyzing trace with hash 346735623, now seen corresponding path program 33 times [2021-06-05 16:05:24,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:24,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522249197] [2021-06-05 16:05:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:24,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522249197] [2021-06-05 16:05:24,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522249197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:24,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541825167] [2021-06-05 16:05:24,415 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:24,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:05:24,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:24,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:24,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:24,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:24,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:24,653 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 43 treesize of output 35 [2021-06-05 16:05:24,655 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:24,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:24,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:24,666 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 35 treesize of output 27 [2021-06-05 16:05:24,668 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:24,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:24,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:24,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:05:24,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:24,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:24,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:24,694 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:10 [2021-06-05 16:05:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:24,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541825167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:24,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:24,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 16:05:24,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795909363] [2021-06-05 16:05:24,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:05:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:05:24,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:05:24,728 INFO L87 Difference]: Start difference. First operand 2991 states and 9858 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:25,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:25,634 INFO L93 Difference]: Finished difference Result 3792 states and 12321 transitions. [2021-06-05 16:05:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:05:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:25,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:25,639 INFO L225 Difference]: With dead ends: 3792 [2021-06-05 16:05:25,639 INFO L226 Difference]: Without dead ends: 3777 [2021-06-05 16:05:25,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 909.9ms TimeCoverageRelationStatistics Valid=277, Invalid=1283, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:05:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-06-05 16:05:25,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3010. [2021-06-05 16:05:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.297441010302426) internal successors, (9922), 3009 states have internal predecessors, (9922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 9922 transitions. [2021-06-05 16:05:25,677 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 9922 transitions. Word has length 30 [2021-06-05 16:05:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:25,677 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 9922 transitions. [2021-06-05 16:05:25,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 9922 transitions. [2021-06-05 16:05:25,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:25,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:25,680 INFO L521 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] [2021-06-05 16:05:25,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:25,881 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:25,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:25,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2142683537, now seen corresponding path program 34 times [2021-06-05 16:05:25,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:25,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977152996] [2021-06-05 16:05:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:26,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:26,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977152996] [2021-06-05 16:05:26,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977152996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:26,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905296726] [2021-06-05 16:05:26,156 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:26,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:05:26,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:26,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:26,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:26,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:26,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:05:26,413 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:26,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:26,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:26,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:05:26,455 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:26,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:26,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:26,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:05:26,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:26,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:26,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:26,544 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 16:05:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:26,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905296726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:26,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:26,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:05:26,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717006824] [2021-06-05 16:05:26,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:05:26,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:26,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:05:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:05:26,585 INFO L87 Difference]: Start difference. First operand 3010 states and 9922 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:27,802 INFO L93 Difference]: Finished difference Result 4310 states and 13931 transitions. [2021-06-05 16:05:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 16:05:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:27,809 INFO L225 Difference]: With dead ends: 4310 [2021-06-05 16:05:27,809 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 16:05:27,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1139.2ms TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 16:05:27,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 16:05:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 3003. [2021-06-05 16:05:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.2958027981345768) internal successors, (9894), 3002 states have internal predecessors, (9894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 9894 transitions. [2021-06-05 16:05:27,861 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 9894 transitions. Word has length 30 [2021-06-05 16:05:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:27,861 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 9894 transitions. [2021-06-05 16:05:27,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:27,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 9894 transitions. [2021-06-05 16:05:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:27,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:27,865 INFO L521 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] [2021-06-05 16:05:28,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-06-05 16:05:28,065 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:28,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:28,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1515816905, now seen corresponding path program 35 times [2021-06-05 16:05:28,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:28,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818885064] [2021-06-05 16:05:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:28,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:28,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818885064] [2021-06-05 16:05:28,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818885064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:28,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597143159] [2021-06-05 16:05:28,335 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:28,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:05:28,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:05:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:29,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:29,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 53 [2021-06-05 16:05:29,779 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:29,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:29,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:29,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:29,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:29,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 41 [2021-06-05 16:05:29,814 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:29,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:29,845 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:29,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 16:05:29,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:29,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:29,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:29,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:68, output treesize:17 [2021-06-05 16:05:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:29,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597143159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:29,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:29,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 16:05:29,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520214073] [2021-06-05 16:05:29,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:05:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:05:29,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=457, Unknown=1, NotChecked=0, Total=552 [2021-06-05 16:05:29,973 INFO L87 Difference]: Start difference. First operand 3003 states and 9894 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:38,101 INFO L93 Difference]: Finished difference Result 4136 states and 13430 transitions. [2021-06-05 16:05:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 16:05:38,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:38,108 INFO L225 Difference]: With dead ends: 4136 [2021-06-05 16:05:38,108 INFO L226 Difference]: Without dead ends: 4111 [2021-06-05 16:05:38,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2206.3ms TimeCoverageRelationStatistics Valid=288, Invalid=1433, Unknown=1, NotChecked=0, Total=1722 [2021-06-05 16:05:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-06-05 16:05:38,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 2999. [2021-06-05 16:05:38,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.2961974649766512) internal successors, (9882), 2998 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9882 transitions. [2021-06-05 16:05:38,150 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9882 transitions. Word has length 30 [2021-06-05 16:05:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:38,150 INFO L482 AbstractCegarLoop]: Abstraction has 2999 states and 9882 transitions. [2021-06-05 16:05:38,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:38,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9882 transitions. [2021-06-05 16:05:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:38,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:38,154 INFO L521 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] [2021-06-05 16:05:38,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:38,354 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:38,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1303532813, now seen corresponding path program 36 times [2021-06-05 16:05:38,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:38,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838731817] [2021-06-05 16:05:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:38,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838731817] [2021-06-05 16:05:38,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838731817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:38,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464622890] [2021-06-05 16:05:38,628 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:38,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:05:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:38,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:05:38,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:38,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:38,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-06-05 16:05:38,834 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:38,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:38,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:38,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:38,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:38,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 16:05:38,867 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:38,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:38,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:38,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 49 [2021-06-05 16:05:38,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:38,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:38,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:38,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:17 [2021-06-05 16:05:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:39,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464622890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:39,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:39,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 16:05:39,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368560459] [2021-06-05 16:05:39,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:05:39,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:39,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:05:39,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:05:39,018 INFO L87 Difference]: Start difference. First operand 2999 states and 9882 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:40,321 INFO L93 Difference]: Finished difference Result 4101 states and 13333 transitions. [2021-06-05 16:05:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 16:05:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:40,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:40,328 INFO L225 Difference]: With dead ends: 4101 [2021-06-05 16:05:40,328 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 16:05:40,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1156.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1667, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 16:05:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 16:05:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3007. [2021-06-05 16:05:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 3.2954091816367264) internal successors, (9906), 3006 states have internal predecessors, (9906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 9906 transitions. [2021-06-05 16:05:40,370 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 9906 transitions. Word has length 30 [2021-06-05 16:05:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:40,370 INFO L482 AbstractCegarLoop]: Abstraction has 3007 states and 9906 transitions. [2021-06-05 16:05:40,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 9906 transitions. [2021-06-05 16:05:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:40,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:40,373 INFO L521 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] [2021-06-05 16:05:40,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable968,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:40,574 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:40,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1246827581, now seen corresponding path program 37 times [2021-06-05 16:05:40,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:40,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481213583] [2021-06-05 16:05:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:40,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:40,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:40,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481213583] [2021-06-05 16:05:40,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481213583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:40,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946538345] [2021-06-05 16:05:40,844 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:41,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:41,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:41,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 43 [2021-06-05 16:05:41,038 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:41,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:41,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:41,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:41,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 35 [2021-06-05 16:05:41,071 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:41,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:41,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:41,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:05:41,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:41,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:41,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:41,159 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:45 [2021-06-05 16:05:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:41,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946538345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:41,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:41,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:05:41,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673113758] [2021-06-05 16:05:41,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:05:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:05:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:05:41,226 INFO L87 Difference]: Start difference. First operand 3007 states and 9906 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:42,173 INFO L93 Difference]: Finished difference Result 4251 states and 13769 transitions. [2021-06-05 16:05:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 16:05:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:42,179 INFO L225 Difference]: With dead ends: 4251 [2021-06-05 16:05:42,179 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 16:05:42,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 784.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1295, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 16:05:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 16:05:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 2999. [2021-06-05 16:05:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 3.2961974649766512) internal successors, (9882), 2998 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 9882 transitions. [2021-06-05 16:05:42,218 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 9882 transitions. Word has length 30 [2021-06-05 16:05:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:42,218 INFO L482 AbstractCegarLoop]: Abstraction has 2999 states and 9882 transitions. [2021-06-05 16:05:42,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 9882 transitions. [2021-06-05 16:05:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:42,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:42,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:42,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable985 [2021-06-05 16:05:42,422 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash -19226196, now seen corresponding path program 44 times [2021-06-05 16:05:42,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:42,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906741260] [2021-06-05 16:05:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:42,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:42,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906741260] [2021-06-05 16:05:42,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906741260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:42,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833315659] [2021-06-05 16:05:42,783 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:42,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:05:42,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:42,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:05:42,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:42,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:42,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:42,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:42,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:42,980 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 47 treesize of output 37 [2021-06-05 16:05:42,982 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:42,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:42,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:42,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:42,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:42,992 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 37 treesize of output 27 [2021-06-05 16:05:42,994 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:42,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:43,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:43,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:05:43,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:43,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:43,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:43,015 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:05:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:43,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833315659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:43,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:43,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 16:05:43,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291347480] [2021-06-05 16:05:43,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:05:43,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:05:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:05:43,037 INFO L87 Difference]: Start difference. First operand 2999 states and 9882 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:44,872 INFO L93 Difference]: Finished difference Result 3992 states and 12753 transitions. [2021-06-05 16:05:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 16:05:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:44,878 INFO L225 Difference]: With dead ends: 3992 [2021-06-05 16:05:44,878 INFO L226 Difference]: Without dead ends: 3966 [2021-06-05 16:05:44,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1648.1ms TimeCoverageRelationStatistics Valid=463, Invalid=2729, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 16:05:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-05 16:05:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 2993. [2021-06-05 16:05:44,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2993 states, 2992 states have (on average 3.297794117647059) internal successors, (9867), 2992 states have internal predecessors, (9867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 9867 transitions. [2021-06-05 16:05:44,918 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 9867 transitions. Word has length 30 [2021-06-05 16:05:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:44,918 INFO L482 AbstractCegarLoop]: Abstraction has 2993 states and 9867 transitions. [2021-06-05 16:05:44,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 9867 transitions. [2021-06-05 16:05:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:44,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:44,921 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:45,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1004,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:45,122 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -196266222, now seen corresponding path program 45 times [2021-06-05 16:05:45,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:45,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303315699] [2021-06-05 16:05:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:45,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:45,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303315699] [2021-06-05 16:05:45,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303315699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:45,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756801159] [2021-06-05 16:05:45,506 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:45,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:05:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:05:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:45,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:45,771 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 63 [2021-06-05 16:05:45,853 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:45,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:45,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:45,888 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 53 [2021-06-05 16:05:45,971 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:46,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:46,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 16:05:46,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:05:46,694 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 127 [2021-06-05 16:05:46,695 INFO L628 ElimStorePlain]: treesize reduction 182, result has 90.7 percent of original size [2021-06-05 16:05:47,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:47,120 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:56, output treesize:97 [2021-06-05 16:05:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:47,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756801159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:47,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:47,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 16:05:47,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940958359] [2021-06-05 16:05:47,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:05:47,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:05:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:05:47,221 INFO L87 Difference]: Start difference. First operand 2993 states and 9867 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:05:50,111 INFO L93 Difference]: Finished difference Result 4162 states and 13260 transitions. [2021-06-05 16:05:50,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 16:05:50,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 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 30 [2021-06-05 16:05:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:05:50,117 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 16:05:50,117 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 16:05:50,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2223.5ms TimeCoverageRelationStatistics Valid=557, Invalid=4845, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 16:05:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 16:05:50,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3033. [2021-06-05 16:05:50,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 3032 states have (on average 3.2932058047493404) internal successors, (9985), 3032 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 9985 transitions. [2021-06-05 16:05:50,167 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 9985 transitions. Word has length 30 [2021-06-05 16:05:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:05:50,167 INFO L482 AbstractCegarLoop]: Abstraction has 3033 states and 9985 transitions. [2021-06-05 16:05:50,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:05:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 9985 transitions. [2021-06-05 16:05:50,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:05:50,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:05:50,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:05:50,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1005 [2021-06-05 16:05:50,371 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:05:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:05:50,371 INFO L82 PathProgramCache]: Analyzing trace with hash -158503640, now seen corresponding path program 46 times [2021-06-05 16:05:50,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:05:50,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446995413] [2021-06-05 16:05:50,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:05:50,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:05:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:50,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:05:50,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446995413] [2021-06-05 16:05:50,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446995413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:50,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353930418] [2021-06-05 16:05:50,696 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:05:50,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:05:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:05:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:05:50,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:05:53,783 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 16:05:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:53,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:53,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:53,797 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 47 treesize of output 37 [2021-06-05 16:05:53,806 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:53,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:05:53,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:53,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:05:53,815 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 37 treesize of output 27 [2021-06-05 16:05:53,818 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:05:53,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:53,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:53,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:05:53,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:05:53,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:05:53,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:05:53,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:05:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:05:53,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353930418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:05:53,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:05:53,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2021-06-05 16:05:53,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592445943] [2021-06-05 16:05:53,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:05:53,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:05:53,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:05:53,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=382, Unknown=3, NotChecked=0, Total=462 [2021-06-05 16:05:53,869 INFO L87 Difference]: Start difference. First operand 3033 states and 9985 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-06-05 16:06:10,956 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-06-05 16:06:19,366 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 16:06:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:19,420 INFO L93 Difference]: Finished difference Result 4132 states and 13320 transitions. [2021-06-05 16:06:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 16:06:19,421 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 30 [2021-06-05 16:06:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:19,426 INFO L225 Difference]: With dead ends: 4132 [2021-06-05 16:06:19,426 INFO L226 Difference]: Without dead ends: 4106 [2021-06-05 16:06:19,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 19579.5ms TimeCoverageRelationStatistics Valid=517, Invalid=3007, Unknown=16, NotChecked=0, Total=3540 [2021-06-05 16:06:19,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-06-05 16:06:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3053. [2021-06-05 16:06:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 3.288007863695937) internal successors, (10035), 3052 states have internal predecessors, (10035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 10035 transitions. [2021-06-05 16:06:19,466 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 10035 transitions. Word has length 30 [2021-06-05 16:06:19,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:19,466 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 10035 transitions. [2021-06-05 16:06:19,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-06-05 16:06:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 10035 transitions. [2021-06-05 16:06:19,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:19,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:19,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:19,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-06-05 16:06:19,670 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1416212346, now seen corresponding path program 47 times [2021-06-05 16:06:19,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:19,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154878539] [2021-06-05 16:06:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:20,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:20,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154878539] [2021-06-05 16:06:20,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154878539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:20,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633339428] [2021-06-05 16:06:20,052 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:20,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:06:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:20,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:06:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:20,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:20,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:20,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:20,276 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 47 treesize of output 37 [2021-06-05 16:06:20,277 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:20,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:20,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:20,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:20,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:20,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:20,287 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 37 treesize of output 27 [2021-06-05 16:06:20,288 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:20,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:20,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:20,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:06:20,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:20,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:20,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:20,312 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:06:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:20,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633339428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:20,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:20,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-06-05 16:06:20,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035311397] [2021-06-05 16:06:20,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:20,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:20,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:20,329 INFO L87 Difference]: Start difference. First operand 3053 states and 10035 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:22,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:22,570 INFO L93 Difference]: Finished difference Result 3970 states and 12729 transitions. [2021-06-05 16:06:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:06:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 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 30 [2021-06-05 16:06:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:22,575 INFO L225 Difference]: With dead ends: 3970 [2021-06-05 16:06:22,575 INFO L226 Difference]: Without dead ends: 3944 [2021-06-05 16:06:22,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2016.7ms TimeCoverageRelationStatistics Valid=546, Invalid=3360, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 16:06:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3944 states. [2021-06-05 16:06:22,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3944 to 3053. [2021-06-05 16:06:22,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 3.288007863695937) internal successors, (10035), 3052 states have internal predecessors, (10035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:22,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 10035 transitions. [2021-06-05 16:06:22,612 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 10035 transitions. Word has length 30 [2021-06-05 16:06:22,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:22,612 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 10035 transitions. [2021-06-05 16:06:22,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:22,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 10035 transitions. [2021-06-05 16:06:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:22,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:22,615 INFO L521 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] [2021-06-05 16:06:22,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1169 [2021-06-05 16:06:22,816 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1423534595, now seen corresponding path program 38 times [2021-06-05 16:06:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:22,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816312293] [2021-06-05 16:06:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:23,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:23,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816312293] [2021-06-05 16:06:23,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816312293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:23,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719360461] [2021-06-05 16:06:23,150 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:23,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:06:23,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:06:23,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:23,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:23,396 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:06:23,429 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:23,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:23,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:23,470 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:06:23,511 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:23,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:23,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:23,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:06:23,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:06:23,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:23,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:23,655 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:82 [2021-06-05 16:06:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:23,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719360461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:23,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:23,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-06-05 16:06:23,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88852642] [2021-06-05 16:06:23,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 16:06:23,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:23,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 16:06:23,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 16:06:23,719 INFO L87 Difference]: Start difference. First operand 3053 states and 10035 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-06-05 16:06:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:26,696 INFO L93 Difference]: Finished difference Result 4626 states and 14589 transitions. [2021-06-05 16:06:26,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:06:26,696 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 30 [2021-06-05 16:06:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:26,703 INFO L225 Difference]: With dead ends: 4626 [2021-06-05 16:06:26,703 INFO L226 Difference]: Without dead ends: 4596 [2021-06-05 16:06:26,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 2449.3ms TimeCoverageRelationStatistics Valid=583, Invalid=3077, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 16:06:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-05 16:06:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3082. [2021-06-05 16:06:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3081 states have (on average 3.294060370009737) internal successors, (10149), 3081 states have internal predecessors, (10149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 10149 transitions. [2021-06-05 16:06:26,746 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 10149 transitions. Word has length 30 [2021-06-05 16:06:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:26,746 INFO L482 AbstractCegarLoop]: Abstraction has 3082 states and 10149 transitions. [2021-06-05 16:06:26,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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) [2021-06-05 16:06:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 10149 transitions. [2021-06-05 16:06:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:26,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:26,749 INFO L521 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] [2021-06-05 16:06:26,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:26,950 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:26,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1311580383, now seen corresponding path program 39 times [2021-06-05 16:06:26,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:26,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569423040] [2021-06-05 16:06:26,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:27,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:27,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569423040] [2021-06-05 16:06:27,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569423040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:27,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90870070] [2021-06-05 16:06:27,261 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:27,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:06:27,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:27,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:06:27,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:27,730 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 16:06:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:27,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:27,780 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2021-06-05 16:06:27,843 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:27,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:27,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:27,873 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 16:06:27,914 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:27,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:27,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:27,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:06:27,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:06:28,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:28,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-06-05 16:06:28,076 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:164 [2021-06-05 16:06:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:28,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90870070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:28,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:28,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:06:28,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728406165] [2021-06-05 16:06:28,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:06:28,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:06:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:06:28,163 INFO L87 Difference]: Start difference. First operand 3082 states and 10149 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:28,480 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-06-05 16:06:29,873 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-06-05 16:06:35,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:35,735 INFO L93 Difference]: Finished difference Result 5085 states and 16123 transitions. [2021-06-05 16:06:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 16:06:35,735 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-06-05 16:06:35,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:35,742 INFO L225 Difference]: With dead ends: 5085 [2021-06-05 16:06:35,742 INFO L226 Difference]: Without dead ends: 5066 [2021-06-05 16:06:35,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 3144.1ms TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 16:06:35,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-06-05 16:06:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 3093. [2021-06-05 16:06:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.2959249676584736) internal successors, (10191), 3092 states have internal predecessors, (10191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 10191 transitions. [2021-06-05 16:06:35,788 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 10191 transitions. Word has length 30 [2021-06-05 16:06:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:35,788 INFO L482 AbstractCegarLoop]: Abstraction has 3093 states and 10191 transitions. [2021-06-05 16:06:35,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 10191 transitions. [2021-06-05 16:06:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:35,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:35,791 INFO L521 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] [2021-06-05 16:06:35,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1225 [2021-06-05 16:06:35,992 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:35,992 INFO L82 PathProgramCache]: Analyzing trace with hash -439860487, now seen corresponding path program 40 times [2021-06-05 16:06:35,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:35,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433095737] [2021-06-05 16:06:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:36,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:36,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433095737] [2021-06-05 16:06:36,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433095737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:36,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339738995] [2021-06-05 16:06:36,291 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:36,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 16:06:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:06:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:36,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:36,514 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 43 treesize of output 35 [2021-06-05 16:06:36,516 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:36,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:36,525 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 35 treesize of output 27 [2021-06-05 16:06:36,526 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:36,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:36,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:36,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:06:36,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:36,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:36,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:36,547 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 16:06:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:36,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339738995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:36,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:36,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:06:36,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367639146] [2021-06-05 16:06:36,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:06:36,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:36,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:06:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:06:36,563 INFO L87 Difference]: Start difference. First operand 3093 states and 10191 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:38,937 INFO L93 Difference]: Finished difference Result 4453 states and 14183 transitions. [2021-06-05 16:06:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 16:06:38,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 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 30 [2021-06-05 16:06:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:38,943 INFO L225 Difference]: With dead ends: 4453 [2021-06-05 16:06:38,943 INFO L226 Difference]: Without dead ends: 4438 [2021-06-05 16:06:38,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 2000.0ms TimeCoverageRelationStatistics Valid=553, Invalid=2417, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 16:06:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-05 16:06:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3082. [2021-06-05 16:06:38,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3082 states, 3081 states have (on average 3.293411230120091) internal successors, (10147), 3081 states have internal predecessors, (10147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3082 states to 3082 states and 10147 transitions. [2021-06-05 16:06:38,989 INFO L78 Accepts]: Start accepts. Automaton has 3082 states and 10147 transitions. Word has length 30 [2021-06-05 16:06:38,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:38,989 INFO L482 AbstractCegarLoop]: Abstraction has 3082 states and 10147 transitions. [2021-06-05 16:06:38,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:38,989 INFO L276 IsEmpty]: Start isEmpty. Operand 3082 states and 10147 transitions. [2021-06-05 16:06:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:38,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:38,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:39,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-06-05 16:06:39,193 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1481027600, now seen corresponding path program 48 times [2021-06-05 16:06:39,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:39,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290887352] [2021-06-05 16:06:39,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:39,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:39,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:39,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290887352] [2021-06-05 16:06:39,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290887352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:39,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775489738] [2021-06-05 16:06:39,606 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:39,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:06:39,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:06:39,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:39,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:39,823 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 47 treesize of output 37 [2021-06-05 16:06:39,825 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:39,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:39,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:39,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:39,834 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 37 treesize of output 27 [2021-06-05 16:06:39,836 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:39,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:39,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:39,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:06:39,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:39,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:39,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:39,858 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:06:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:39,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775489738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:39,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:39,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2021-06-05 16:06:39,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711769484] [2021-06-05 16:06:39,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:06:39,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:39,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:06:39,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:06:39,875 INFO L87 Difference]: Start difference. First operand 3082 states and 10147 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 16:06:42,132 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-06-05 16:06:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:44,152 INFO L93 Difference]: Finished difference Result 4698 states and 14812 transitions. [2021-06-05 16:06:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 16:06:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 30 [2021-06-05 16:06:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:44,159 INFO L225 Difference]: With dead ends: 4698 [2021-06-05 16:06:44,159 INFO L226 Difference]: Without dead ends: 4669 [2021-06-05 16:06:44,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3237 ImplicationChecksByTransitivity, 3822.0ms TimeCoverageRelationStatistics Valid=1355, Invalid=7765, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 16:06:44,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4669 states. [2021-06-05 16:06:44,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 3093. [2021-06-05 16:06:44,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 3092 states have (on average 3.297865459249677) internal successors, (10197), 3092 states have internal predecessors, (10197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 10197 transitions. [2021-06-05 16:06:44,203 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 10197 transitions. Word has length 30 [2021-06-05 16:06:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:44,203 INFO L482 AbstractCegarLoop]: Abstraction has 3093 states and 10197 transitions. [2021-06-05 16:06:44,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-06-05 16:06:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 10197 transitions. [2021-06-05 16:06:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:44,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:44,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:44,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:44,407 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1515107700, now seen corresponding path program 49 times [2021-06-05 16:06:44,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:44,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127119738] [2021-06-05 16:06:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:44,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:44,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127119738] [2021-06-05 16:06:44,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127119738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:44,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477890542] [2021-06-05 16:06:44,719 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:44,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:06:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:44,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:44,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:44,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:44,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:44,937 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 47 treesize of output 37 [2021-06-05 16:06:44,939 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:44,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:44,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:44,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:44,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:44,948 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 37 treesize of output 27 [2021-06-05 16:06:44,950 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:44,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:44,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:44,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 16:06:44,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 16:06:44,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:44,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:44,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 16:06:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:44,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477890542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:44,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:44,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2021-06-05 16:06:44,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316251144] [2021-06-05 16:06:44,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 16:06:44,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:44,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 16:06:44,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-06-05 16:06:44,993 INFO L87 Difference]: Start difference. First operand 3093 states and 10197 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:47,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:47,634 INFO L93 Difference]: Finished difference Result 5652 states and 17871 transitions. [2021-06-05 16:06:47,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 16:06:47,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 30 [2021-06-05 16:06:47,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:47,642 INFO L225 Difference]: With dead ends: 5652 [2021-06-05 16:06:47,642 INFO L226 Difference]: Without dead ends: 5631 [2021-06-05 16:06:47,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 2165.3ms TimeCoverageRelationStatistics Valid=672, Invalid=4158, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 16:06:47,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-06-05 16:06:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3236. [2021-06-05 16:06:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 3.2976816074188564) internal successors, (10668), 3235 states have internal predecessors, (10668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 10668 transitions. [2021-06-05 16:06:47,703 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 10668 transitions. Word has length 30 [2021-06-05 16:06:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:47,703 INFO L482 AbstractCegarLoop]: Abstraction has 3236 states and 10668 transitions. [2021-06-05 16:06:47,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 10668 transitions. [2021-06-05 16:06:47,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:47,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:47,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:06:47,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1281,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:47,907 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1006751760, now seen corresponding path program 50 times [2021-06-05 16:06:47,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:47,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857993770] [2021-06-05 16:06:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:48,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:48,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857993770] [2021-06-05 16:06:48,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857993770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:48,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520127752] [2021-06-05 16:06:48,191 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:48,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 16:06:48,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:48,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 16:06:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:48,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:48,488 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 79 [2021-06-05 16:06:48,591 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:48,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:48,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:48,629 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 65 [2021-06-05 16:06:48,723 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:48,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:48,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:48,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 89 [2021-06-05 16:06:49,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:06:49,588 WARN L205 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 147 [2021-06-05 16:06:49,589 INFO L628 ElimStorePlain]: treesize reduction 457, result has 81.2 percent of original size [2021-06-05 16:06:50,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:50,016 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:77, output treesize:87 [2021-06-05 16:06:50,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:50,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520127752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:50,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:50,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 16:06:50,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875734194] [2021-06-05 16:06:50,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 16:06:50,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:50,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 16:06:50,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 16:06:50,105 INFO L87 Difference]: Start difference. First operand 3236 states and 10668 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:52,501 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-06-05 16:06:53,351 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-06-05 16:06:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:55,348 INFO L93 Difference]: Finished difference Result 7312 states and 22569 transitions. [2021-06-05 16:06:55,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 16:06:55,348 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 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 30 [2021-06-05 16:06:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:55,358 INFO L225 Difference]: With dead ends: 7312 [2021-06-05 16:06:55,359 INFO L226 Difference]: Without dead ends: 7199 [2021-06-05 16:06:55,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3839 ImplicationChecksByTransitivity, 4445.8ms TimeCoverageRelationStatistics Valid=1874, Invalid=9468, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 16:06:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2021-06-05 16:06:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 3482. [2021-06-05 16:06:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3481 states have (on average 3.3039356506750934) internal successors, (11501), 3481 states have internal predecessors, (11501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 11501 transitions. [2021-06-05 16:06:55,432 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 11501 transitions. Word has length 30 [2021-06-05 16:06:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:55,433 INFO L482 AbstractCegarLoop]: Abstraction has 3482 states and 11501 transitions. [2021-06-05 16:06:55,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 11501 transitions. [2021-06-05 16:06:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:55,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:55,437 INFO L521 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] [2021-06-05 16:06:55,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1282,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:55,644 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:55,644 INFO L82 PathProgramCache]: Analyzing trace with hash 65063197, now seen corresponding path program 41 times [2021-06-05 16:06:55,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:55,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555239719] [2021-06-05 16:06:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:55,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:55,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555239719] [2021-06-05 16:06:55,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555239719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:55,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146028949] [2021-06-05 16:06:55,916 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:55,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 16:06:55,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:55,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 16:06:55,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:56,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:56,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:56,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:56,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:56,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:06:56,100 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:56,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:56,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:06:56,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 16:06:56,137 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:56,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:06:56,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:06:56,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:56,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:56,223 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:92 [2021-06-05 16:06:56,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:56,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146028949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:56,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:56,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:06:56,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609442434] [2021-06-05 16:06:56,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:06:56,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:56,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:06:56,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:06:56,287 INFO L87 Difference]: Start difference. First operand 3482 states and 11501 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:58,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:06:58,456 INFO L93 Difference]: Finished difference Result 4655 states and 15154 transitions. [2021-06-05 16:06:58,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 16:06:58,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-06-05 16:06:58,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:06:58,463 INFO L225 Difference]: With dead ends: 4655 [2021-06-05 16:06:58,463 INFO L226 Difference]: Without dead ends: 4630 [2021-06-05 16:06:58,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 1941.0ms TimeCoverageRelationStatistics Valid=468, Invalid=2288, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:06:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-06-05 16:06:58,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3476. [2021-06-05 16:06:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 3.3047482014388487) internal successors, (11484), 3475 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 11484 transitions. [2021-06-05 16:06:58,511 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 11484 transitions. Word has length 30 [2021-06-05 16:06:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:06:58,511 INFO L482 AbstractCegarLoop]: Abstraction has 3476 states and 11484 transitions. [2021-06-05 16:06:58,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 11484 transitions. [2021-06-05 16:06:58,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:06:58,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:06:58,515 INFO L521 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] [2021-06-05 16:06:58,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-05 16:06:58,715 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:06:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:06:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1057760611, now seen corresponding path program 42 times [2021-06-05 16:06:58,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:06:58,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393627790] [2021-06-05 16:06:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:06:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:06:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:58,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:06:58,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393627790] [2021-06-05 16:06:58,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393627790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:58,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866435908] [2021-06-05 16:06:58,966 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:06:58,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 16:06:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:06:58,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 16:06:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:06:59,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:59,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:59,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2021-06-05 16:06:59,140 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:59,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:59,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:06:59,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 39 [2021-06-05 16:06:59,181 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:06:59,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 49 [2021-06-05 16:06:59,214 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:06:59,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:06:59,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:06:59,262 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:55, output treesize:28 [2021-06-05 16:06:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:06:59,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866435908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:06:59,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:06:59,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 16:06:59,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287075198] [2021-06-05 16:06:59,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 16:06:59,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:06:59,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 16:06:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 16:06:59,321 INFO L87 Difference]: Start difference. First operand 3476 states and 11484 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:06:59,663 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-05 16:07:00,051 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-06-05 16:07:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:02,131 INFO L93 Difference]: Finished difference Result 5015 states and 16311 transitions. [2021-06-05 16:07:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 16:07:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 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 30 [2021-06-05 16:07:02,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:02,138 INFO L225 Difference]: With dead ends: 5015 [2021-06-05 16:07:02,138 INFO L226 Difference]: Without dead ends: 4990 [2021-06-05 16:07:02,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2356.1ms TimeCoverageRelationStatistics Valid=689, Invalid=4003, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 16:07:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2021-06-05 16:07:02,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 3486. [2021-06-05 16:07:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 3.30416068866571) internal successors, (11515), 3485 states have internal predecessors, (11515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 11515 transitions. [2021-06-05 16:07:02,189 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 11515 transitions. Word has length 30 [2021-06-05 16:07:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:02,189 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 11515 transitions. [2021-06-05 16:07:02,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:02,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 11515 transitions. [2021-06-05 16:07:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:07:02,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:02,193 INFO L521 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] [2021-06-05 16:07:02,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1453 [2021-06-05 16:07:02,393 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:02,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:02,393 INFO L82 PathProgramCache]: Analyzing trace with hash -218609887, now seen corresponding path program 43 times [2021-06-05 16:07:02,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:02,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182287207] [2021-06-05 16:07:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:02,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:02,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182287207] [2021-06-05 16:07:02,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182287207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:02,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490603104] [2021-06-05 16:07:02,648 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 16:07:02,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:02,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:02,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:02,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:02,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2021-06-05 16:07:02,829 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:02,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:02,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:02,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 16:07:02,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:02,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 35 [2021-06-05 16:07:02,864 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:02,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:02,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:02,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 16:07:02,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:07:02,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:02,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:02,967 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:45 [2021-06-05 16:07:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:03,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490603104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:03,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:03,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-06-05 16:07:03,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670057264] [2021-06-05 16:07:03,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 16:07:03,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:03,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 16:07:03,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 16:07:03,032 INFO L87 Difference]: Start difference. First operand 3486 states and 11515 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:03,258 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-06-05 16:07:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 16:07:05,155 INFO L93 Difference]: Finished difference Result 4787 states and 15584 transitions. [2021-06-05 16:07:05,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 16:07:05,155 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 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 30 [2021-06-05 16:07:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 16:07:05,161 INFO L225 Difference]: With dead ends: 4787 [2021-06-05 16:07:05,161 INFO L226 Difference]: Without dead ends: 4762 [2021-06-05 16:07:05,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1704.0ms TimeCoverageRelationStatistics Valid=464, Invalid=2292, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 16:07:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2021-06-05 16:07:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 3476. [2021-06-05 16:07:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3476 states, 3475 states have (on average 3.3047482014388487) internal successors, (11484), 3475 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3476 states to 3476 states and 11484 transitions. [2021-06-05 16:07:05,208 INFO L78 Accepts]: Start accepts. Automaton has 3476 states and 11484 transitions. Word has length 30 [2021-06-05 16:07:05,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 16:07:05,208 INFO L482 AbstractCegarLoop]: Abstraction has 3476 states and 11484 transitions. [2021-06-05 16:07:05,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:07:05,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3476 states and 11484 transitions. [2021-06-05 16:07:05,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 16:07:05,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 16:07:05,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 16:07:05,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:05,421 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 16:07:05,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 16:07:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1509468262, now seen corresponding path program 51 times [2021-06-05 16:07:05,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 16:07:05,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220903101] [2021-06-05 16:07:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 16:07:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 16:07:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:05,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 16:07:05,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220903101] [2021-06-05 16:07:05,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220903101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:05,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689118591] [2021-06-05 16:07:05,825 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:07:05,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 16:07:05,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 16:07:05,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 16:07:05,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 16:07:11,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:11,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:11,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:11,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 67 [2021-06-05 16:07:11,585 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:11,640 INFO L628 ElimStorePlain]: treesize reduction 3, result has 96.6 percent of original size [2021-06-05 16:07:11,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:11,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 16:07:11,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:11,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 59 [2021-06-05 16:07:11,878 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 16:07:11,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:11,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 16:07:11,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 83 [2021-06-05 16:07:12,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 16:07:12,660 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 123 [2021-06-05 16:07:12,660 INFO L628 ElimStorePlain]: treesize reduction 904, result has 55.1 percent of original size [2021-06-05 16:07:12,892 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 202 [2021-06-05 16:07:13,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 16:07:13,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:1496 [2021-06-05 16:07:13,828 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 27 [2021-06-05 16:07:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 16:07:13,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689118591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 16:07:13,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 16:07:13,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 16:07:13,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643419648] [2021-06-05 16:07:13,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 16:07:13,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 16:07:13,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 16:07:13,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=711, Unknown=3, NotChecked=0, Total=812 [2021-06-05 16:07:13,917 INFO L87 Difference]: Start difference. First operand 3476 states and 11484 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 16:09:08,214 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-05 16:09:08,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1490,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 16:09:08,416 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:155) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:128) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertPostcondition(IncrementalHoareTripleChecker.java:662) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:281) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.releaseLock(ProtectiveHoareTripleChecker.java:93) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.releaseLock(EfficientHoareTripleChecker.java:162) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:201) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:877) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:774) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:152) ... 34 more [2021-06-05 16:09:08,419 INFO L168 Benchmark]: Toolchain (without parser) took 455084.76 ms. Allocated memory was 369.1 MB in the beginning and 771.8 MB in the end (delta: 402.7 MB). Free memory was 348.6 MB in the beginning and 716.2 MB in the end (delta: -367.6 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.0 GB. [2021-06-05 16:09:08,419 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 369.1 MB. Free memory is still 349.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:09:08,419 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.30 ms. Allocated memory is still 369.1 MB. Free memory was 348.6 MB in the beginning and 347.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 16:09:08,419 INFO L168 Benchmark]: Boogie Preprocessor took 14.02 ms. Allocated memory is still 369.1 MB. Free memory was 347.1 MB in the beginning and 346.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:09:08,419 INFO L168 Benchmark]: RCFGBuilder took 255.45 ms. Allocated memory is still 369.1 MB. Free memory was 346.0 MB in the beginning and 334.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 16:09:08,419 INFO L168 Benchmark]: TraceAbstraction took 454792.92 ms. Allocated memory was 369.1 MB in the beginning and 771.8 MB in the end (delta: 402.7 MB). Free memory was 334.0 MB in the beginning and 716.2 MB in the end (delta: -382.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.0 GB. [2021-06-05 16:09:08,420 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 0.09 ms. Allocated memory is still 369.1 MB. Free memory is still 349.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.30 ms. Allocated memory is still 369.1 MB. Free memory was 348.6 MB in the beginning and 347.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.02 ms. Allocated memory is still 369.1 MB. Free memory was 347.1 MB in the beginning and 346.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 255.45 ms. Allocated memory is still 369.1 MB. Free memory was 346.0 MB in the beginning and 334.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 454792.92 ms. Allocated memory was 369.1 MB in the beginning and 771.8 MB in the end (delta: 402.7 MB). Free memory was 334.0 MB in the beginning and 716.2 MB in the end (delta: -382.3 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:155) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...