/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-more/sum-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 17:02:37,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:02:37,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:02:37,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 17:02:37,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 17:02:37,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 17:02:37,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 17:02:37,619 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 17:02:37,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:02:37,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:02:37,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:02:37,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:02:37,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:02:37,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:02:37,634 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:02:37,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:02:37,634 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:02:37,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:02:37,634 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:02:37,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:02:37,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:02:37,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:02:37,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:02:37,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:02:37,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:02:37,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:02:37,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:02:37,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:02:37,636 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:02:37,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:02:37,636 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 17:02:37,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:02:37,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:02:37,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:02:37,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:02:37,871 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 17:02:37,871 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 17:02:37,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl [2021-06-05 17:02:37,872 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sum-fun-alt.wvr.bpl' [2021-06-05 17:02:37,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:02:37,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 17:02:37,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:02:37,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:02:37,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:02:37,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:02:37,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:02:37,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:02:37,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:02:37,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/1) ... [2021-06-05 17:02:37,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:02:37,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:02:37,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:02:37,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:02:37,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (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 17:02:37,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 17:02:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 17:02:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 17:02:37,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 17:02:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 17:02:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 17:02:37,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 17:02:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:02:37,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:02:37,997 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 17:02:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 17:02:37,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 17:02:37,997 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 17:02:38,145 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:02:38,145 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 17:02:38,146 INFO L202 PluginConnector]: Adding new model sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:02:38 BoogieIcfgContainer [2021-06-05 17:02:38,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:02:38,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:02:38,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:02:38,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:02:38,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:02:37" (1/2) ... [2021-06-05 17:02:38,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1268382b and model type sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:02:38, skipping insertion in model container [2021-06-05 17:02:38,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:02:38" (2/2) ... [2021-06-05 17:02:38,151 INFO L111 eAbstractionObserver]: Analyzing ICFG sum-fun-alt.wvr.bpl [2021-06-05 17:02:38,154 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:02:38,154 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:02:38,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:02:38,155 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:02:38,194 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 17:02:38,208 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 17:02:38,238 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:02:38,238 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:02:38,238 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:02:38,238 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:02:38,238 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:02:38,238 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:02:38,238 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:02:38,238 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 17:02:38,244 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 17:02:38,266 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 17:02:38,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:38,276 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 17:02:38,276 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:38,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:38,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1272469491, now seen corresponding path program 1 times [2021-06-05 17:02:38,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:38,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19985689] [2021-06-05 17:02:38,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:38,418 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 17:02:38,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:38,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19985689] [2021-06-05 17:02:38,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19985689] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:02:38,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:02:38,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 17:02:38,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372666090] [2021-06-05 17:02:38,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 17:02:38,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:38,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 17:02:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:02:38,431 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 17:02:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:38,456 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 17:02:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 17:02:38,457 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 17:02:38,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:38,465 INFO L225 Difference]: With dead ends: 217 [2021-06-05 17:02:38,465 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 17:02:38,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:02:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 17:02:38,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 17:02:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 17:02:38,495 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 17:02:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:38,496 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 17:02:38,496 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 17:02:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 17:02:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 17:02:38,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:38,497 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] [2021-06-05 17:02:38,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:02:38,497 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:38,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:38,498 INFO L82 PathProgramCache]: Analyzing trace with hash -411683507, now seen corresponding path program 1 times [2021-06-05 17:02:38,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:38,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988757477] [2021-06-05 17:02:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:38,531 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 17:02:38,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:38,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988757477] [2021-06-05 17:02:38,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988757477] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:02:38,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:02:38,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:02:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815811199] [2021-06-05 17:02:38,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 17:02:38,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:38,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 17:02:38,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 17:02:38,533 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:38,569 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 17:02:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 17:02:38,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-06-05 17:02:38,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:38,571 INFO L225 Difference]: With dead ends: 158 [2021-06-05 17:02:38,571 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 17:02:38,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:02:38,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 17:02:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 17:02:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 17:02:38,578 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 17:02:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:38,578 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 17:02:38,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 17:02:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 17:02:38,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:38,580 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] [2021-06-05 17:02:38,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:02:38,580 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:38,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash 296923691, now seen corresponding path program 1 times [2021-06-05 17:02:38,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:38,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301226123] [2021-06-05 17:02:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:38,625 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 17:02:38,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:38,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301226123] [2021-06-05 17:02:38,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301226123] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:02:38,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:02:38,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 17:02:38,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531017326] [2021-06-05 17:02:38,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:02:38,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:02:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:02:38,629 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:38,683 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 17:02:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:02:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 20 [2021-06-05 17:02:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:38,691 INFO L225 Difference]: With dead ends: 183 [2021-06-05 17:02:38,691 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 17:02:38,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:02:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 17:02:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 17:02:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 17:02:38,699 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 17:02:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:38,699 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 17:02:38,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 17:02:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:02:38,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:38,700 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] [2021-06-05 17:02:38,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 17:02:38,700 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1416433813, now seen corresponding path program 1 times [2021-06-05 17:02:38,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:38,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078218362] [2021-06-05 17:02:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:39,008 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 17:02:39,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078218362] [2021-06-05 17:02:39,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078218362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:39,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404793224] [2021-06-05 17:02:39,009 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 17:02:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 17:02:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:39,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:02:39,276 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 11 treesize of output 7 [2021-06-05 17:02:39,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:39,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:39,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:39,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2021-06-05 17:02:39,309 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 17:02:39,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404793224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:39,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:39,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:02:39,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459089149] [2021-06-05 17:02:39,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:39,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:39,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:39,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:39,312 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) 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 17:02:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:39,519 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 17:02:39,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:02:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) 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 22 [2021-06-05 17:02:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:39,525 INFO L225 Difference]: With dead ends: 330 [2021-06-05 17:02:39,525 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 17:02:39,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:02:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 17:02:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 17:02:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 17:02:39,546 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 17:02:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:39,546 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 17:02:39,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) 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 17:02:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 17:02:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:02:39,548 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:39,548 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] [2021-06-05 17:02:39,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:39,749 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:39,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1584242905, now seen corresponding path program 2 times [2021-06-05 17:02:39,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:39,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748160028] [2021-06-05 17:02:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:39,901 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 17:02:39,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:39,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748160028] [2021-06-05 17:02:39,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748160028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:39,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101553787] [2021-06-05 17:02:39,902 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 17:02:39,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:39,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 17:02:39,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:40,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:40,042 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 11 treesize of output 15 [2021-06-05 17:02:40,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:02:40,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:40,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:40,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-06-05 17:02:40,115 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 17:02:40,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101553787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:40,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:40,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 17:02:40,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735819407] [2021-06-05 17:02:40,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:40,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:40,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:40,120 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 17:02:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:40,397 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 17:02:40,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:02:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 22 [2021-06-05 17:02:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:40,399 INFO L225 Difference]: With dead ends: 374 [2021-06-05 17:02:40,400 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 17:02:40,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:02:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 17:02:40,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 17:02:40,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 17:02:40,416 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 17:02:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:40,416 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 17:02:40,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 17:02:40,416 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 17:02:40,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:02:40,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:40,417 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] [2021-06-05 17:02:40,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:40,633 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:40,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:40,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1285469457, now seen corresponding path program 3 times [2021-06-05 17:02:40,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:40,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646101732] [2021-06-05 17:02:40,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:40,732 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 17:02:40,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:40,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646101732] [2021-06-05 17:02:40,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646101732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110570506] [2021-06-05 17:02:40,739 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 17:02:40,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:02:40,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:40,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:02:40,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:02:40,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:02:40,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:40,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:40,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-06-05 17:02:40,855 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 17:02:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110570506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:40,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:40,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:02:40,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415345002] [2021-06-05 17:02:40,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:40,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:40,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:40,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:40,857 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:40,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:40,967 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 17:02:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:02:40,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 17:02:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:40,969 INFO L225 Difference]: With dead ends: 363 [2021-06-05 17:02:40,969 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 17:02:40,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:02:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 17:02:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 17:02:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 17:02:40,975 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 17:02:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:40,975 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 17:02:40,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 17:02:40,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:02:40,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:40,976 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] [2021-06-05 17:02:41,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:41,193 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:41,193 INFO L82 PathProgramCache]: Analyzing trace with hash 285356143, now seen corresponding path program 4 times [2021-06-05 17:02:41,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:41,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856807598] [2021-06-05 17:02:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:41,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:41,290 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 17:02:41,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856807598] [2021-06-05 17:02:41,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856807598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:41,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039176751] [2021-06-05 17:02:41,290 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 17:02:41,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 17:02:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:41,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:41,407 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 11 treesize of output 15 [2021-06-05 17:02:41,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:02:41,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:02:41,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:02:41,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:19 [2021-06-05 17:02:41,476 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 17:02:41,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039176751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:41,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:41,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:02:41,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560186317] [2021-06-05 17:02:41,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:41,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:41,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:41,478 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:41,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:41,655 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 17:02:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:02:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 17:02:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:41,658 INFO L225 Difference]: With dead ends: 425 [2021-06-05 17:02:41,658 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 17:02:41,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:02:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 17:02:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 17:02:41,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 17:02:41,663 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 17:02:41,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:41,664 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 17:02:41,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 17:02:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:41,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:41,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:41,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:41,880 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:41,880 INFO L82 PathProgramCache]: Analyzing trace with hash -703639479, now seen corresponding path program 5 times [2021-06-05 17:02:41,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:41,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142067667] [2021-06-05 17:02:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:41,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142067667] [2021-06-05 17:02:41,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142067667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:41,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521803779] [2021-06-05 17:02:41,919 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 17:02:41,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:41,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:41,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:42,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521803779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:42,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:42,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:02:42,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929807745] [2021-06-05 17:02:42,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:42,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:42,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:42,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:42,033 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:02:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:42,388 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 17:02:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:02:42,391 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:02:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:42,393 INFO L225 Difference]: With dead ends: 619 [2021-06-05 17:02:42,393 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 17:02:42,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:02:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 17:02:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 17:02:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:42,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 17:02:42,400 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 17:02:42,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:42,400 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 17:02:42,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:02:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 17:02:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:42,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:42,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:42,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 17:02:42,617 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1679958323, now seen corresponding path program 6 times [2021-06-05 17:02:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:42,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724206534] [2021-06-05 17:02:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:42,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:42,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724206534] [2021-06-05 17:02:42,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724206534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:42,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293409923] [2021-06-05 17:02:42,654 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 17:02:42,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:42,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:42,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:42,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293409923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:42,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:42,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:42,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011253818] [2021-06-05 17:02:42,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:42,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:42,768 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:02:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:43,422 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 17:02:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:02:43,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:43,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:43,426 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 17:02:43,426 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 17:02:43,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:02:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 17:02:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 17:02:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 17:02:43,436 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 17:02:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:43,436 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 17:02:43,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 17:02:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:43,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:43,437 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:43,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:43,654 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1113006243, now seen corresponding path program 7 times [2021-06-05 17:02:43,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:43,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381815797] [2021-06-05 17:02:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:43,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:43,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381815797] [2021-06-05 17:02:43,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381815797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:43,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130593554] [2021-06-05 17:02:43,706 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 17:02:43,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:43,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130593554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:43,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:43,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:43,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109536344] [2021-06-05 17:02:43,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:43,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:43,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:43,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:43,942 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:02:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:44,524 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 17:02:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:02:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:44,528 INFO L225 Difference]: With dead ends: 951 [2021-06-05 17:02:44,528 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 17:02:44,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:02:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 17:02:44,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 17:02:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 17:02:44,537 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 17:02:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:44,538 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 17:02:44,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 17:02:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:44,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:44,539 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 17:02:44,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 17:02:44,753 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:44,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:44,753 INFO L82 PathProgramCache]: Analyzing trace with hash -176867571, now seen corresponding path program 1 times [2021-06-05 17:02:44,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:44,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139907351] [2021-06-05 17:02:44,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:44,784 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 17:02:44,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:44,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139907351] [2021-06-05 17:02:44,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139907351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:44,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642738102] [2021-06-05 17:02:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:02:44,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:44,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:02:44,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:44,864 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 17:02:44,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642738102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:44,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:44,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:02:44,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860056481] [2021-06-05 17:02:44,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:02:44,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:44,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:02:44,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:02:44,865 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:44,975 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 17:02:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:02:44,975 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 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 17:02:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:44,978 INFO L225 Difference]: With dead ends: 669 [2021-06-05 17:02:44,978 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 17:02:44,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 17:02:44,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 17:02:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 17:02:44,986 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 17:02:44,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:44,986 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 17:02:44,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 17:02:44,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:44,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:44,987 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:45,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 17:02:45,203 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:45,203 INFO L82 PathProgramCache]: Analyzing trace with hash -613836279, now seen corresponding path program 8 times [2021-06-05 17:02:45,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:45,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351454018] [2021-06-05 17:02:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:45,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351454018] [2021-06-05 17:02:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351454018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118425808] [2021-06-05 17:02:45,247 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 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 17:02:45,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:45,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:45,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:45,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:45,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118425808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:45,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:45,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 17:02:45,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253878464] [2021-06-05 17:02:45,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:45,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:45,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:45,374 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 17:02:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:45,518 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 17:02:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:02:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-06-05 17:02:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:45,521 INFO L225 Difference]: With dead ends: 710 [2021-06-05 17:02:45,521 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 17:02:45,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:02:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 17:02:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 17:02:45,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:45,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 17:02:45,534 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 17:02:45,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:45,534 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 17:02:45,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 17:02:45,535 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 17:02:45,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:45,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:45,536 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 17:02:45,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 17:02:45,751 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1319793611, now seen corresponding path program 2 times [2021-06-05 17:02:45,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:45,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499783466] [2021-06-05 17:02:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:45,775 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 17:02:45,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:45,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499783466] [2021-06-05 17:02:45,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499783466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:45,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311371013] [2021-06-05 17:02:45,775 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 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 17:02:45,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:45,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:45,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:02:45,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:45,846 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 17:02:45,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311371013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:45,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:45,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:02:45,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006123542] [2021-06-05 17:02:45,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:02:45,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:02:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:02:45,847 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:45,939 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 17:02:45,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:02:45,939 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 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 17:02:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:45,942 INFO L225 Difference]: With dead ends: 830 [2021-06-05 17:02:45,942 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 17:02:45,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 17:02:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 17:02:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 17:02:45,955 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 17:02:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:45,955 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 17:02:45,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 17:02:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:45,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:45,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:46,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 17:02:46,174 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:46,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:46,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1628492119, now seen corresponding path program 9 times [2021-06-05 17:02:46,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:46,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280659206] [2021-06-05 17:02:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:46,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:46,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280659206] [2021-06-05 17:02:46,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280659206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:46,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134942721] [2021-06-05 17:02:46,219 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 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 17:02:46,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:46,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:46,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134942721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:46,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:46,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:02:46,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931112472] [2021-06-05 17:02:46,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:46,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:46,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:46,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:46,314 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:46,567 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 17:02:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:02:46,568 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 17:02:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:46,572 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 17:02:46,572 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 17:02:46,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:02:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 17:02:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 17:02:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 17:02:46,587 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 17:02:46,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:46,587 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 17:02:46,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:46,588 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 17:02:46,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:46,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:46,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:46,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 17:02:46,797 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:46,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1881561083, now seen corresponding path program 10 times [2021-06-05 17:02:46,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:46,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142085423] [2021-06-05 17:02:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:46,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:46,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142085423] [2021-06-05 17:02:46,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142085423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:46,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569376379] [2021-06-05 17:02:46,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:46,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:46,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:46,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569376379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:46,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:46,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:02:46,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612271868] [2021-06-05 17:02:46,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:46,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:46,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:46,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:46,915 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:47,296 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 17:02:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:02:47,296 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 17:02:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:47,301 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 17:02:47,301 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 17:02:47,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:02:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 17:02:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 17:02:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:47,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 17:02:47,317 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 17:02:47,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:47,317 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 17:02:47,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:47,317 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 17:02:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:47,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:47,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:47,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:47,533 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1330383557, now seen corresponding path program 11 times [2021-06-05 17:02:47,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:47,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258833582] [2021-06-05 17:02:47,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:47,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:47,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258833582] [2021-06-05 17:02:47,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258833582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:47,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909402418] [2021-06-05 17:02:47,569 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 17:02:47,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:47,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:47,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:47,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:47,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909402418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:47,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:47,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 17:02:47,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976445670] [2021-06-05 17:02:47,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:47,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:47,667 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) 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 17:02:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:47,879 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 17:02:47,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:02:47,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 24 [2021-06-05 17:02:47,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:47,884 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 17:02:47,884 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 17:02:47,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:02:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 17:02:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 17:02:47,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 17:02:47,899 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 17:02:47,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:47,899 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 17:02:47,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) 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 17:02:47,899 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 17:02:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:47,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:47,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:48,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 17:02:48,116 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1493505621, now seen corresponding path program 12 times [2021-06-05 17:02:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:48,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391398568] [2021-06-05 17:02:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:48,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391398568] [2021-06-05 17:02:48,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391398568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617857592] [2021-06-05 17:02:48,152 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 17:02:48,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:48,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:48,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:48,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617857592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:48,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:48,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 17:02:48,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559320844] [2021-06-05 17:02:48,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:48,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:48,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:48,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:48,252 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 17:02:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:48,557 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 17:02:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:02:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 17:02:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:48,562 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 17:02:48,562 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 17:02:48,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:02:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 17:02:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 17:02:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 17:02:48,577 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 17:02:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:48,577 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 17:02:48,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 17:02:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 17:02:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:48,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:48,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:48,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:48,793 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1926382225, now seen corresponding path program 13 times [2021-06-05 17:02:48,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:48,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925534041] [2021-06-05 17:02:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:48,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:48,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925534041] [2021-06-05 17:02:48,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925534041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:48,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600050442] [2021-06-05 17:02:48,831 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 17:02:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:48,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600050442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:48,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:48,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:02:48,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074086900] [2021-06-05 17:02:48,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:02:48,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:48,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:02:48,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:02:48,903 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:49,200 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 17:02:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:02:49,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 17:02:49,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:49,206 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 17:02:49,206 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 17:02:49,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:02:49,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 17:02:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 17:02:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 17:02:49,222 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 17:02:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:49,223 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 17:02:49,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:49,223 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 17:02:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:49,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:49,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:49,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 17:02:49,442 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2096575881, now seen corresponding path program 14 times [2021-06-05 17:02:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:49,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190964029] [2021-06-05 17:02:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:49,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:49,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:49,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190964029] [2021-06-05 17:02:49,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190964029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:49,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019587289] [2021-06-05 17:02:49,472 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 17:02:49,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:49,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:49,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:49,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:49,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019587289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:49,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:49,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:49,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497395326] [2021-06-05 17:02:49,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:49,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:49,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:49,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:49,567 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:02:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:50,191 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 17:02:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:02:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:50,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:50,199 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 17:02:50,199 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 17:02:50,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 374.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:02:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 17:02:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 17:02:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 17:02:50,222 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 17:02:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:50,222 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 17:02:50,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 17:02:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:50,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:50,224 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:50,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:50,437 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1631439335, now seen corresponding path program 15 times [2021-06-05 17:02:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:50,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798738388] [2021-06-05 17:02:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:50,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:50,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798738388] [2021-06-05 17:02:50,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798738388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:50,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872610497] [2021-06-05 17:02:50,470 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 17:02:50,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:50,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872610497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:50,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:50,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:50,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352542106] [2021-06-05 17:02:50,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:50,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:50,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:50,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:50,574 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:02:51,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:51,180 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 17:02:51,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:02:51,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:51,185 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 17:02:51,185 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 17:02:51,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:02:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 17:02:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 17:02:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:51,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 17:02:51,206 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 17:02:51,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:51,206 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 17:02:51,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 17:02:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:51,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:51,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:51,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 17:02:51,424 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1491182103, now seen corresponding path program 16 times [2021-06-05 17:02:51,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:51,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023796420] [2021-06-05 17:02:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:51,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:51,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023796420] [2021-06-05 17:02:51,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023796420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:51,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150194139] [2021-06-05 17:02:51,453 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) [2021-06-05 17:02:51,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:51,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:51,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150194139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:51,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:51,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:02:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287895436] [2021-06-05 17:02:51,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:51,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:51,553 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:52,068 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 17:02:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:02:52,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:52,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:52,073 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 17:02:52,073 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 17:02:52,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:02:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 17:02:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 17:02:52,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 17:02:52,095 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 17:02:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:52,095 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 17:02:52,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 17:02:52,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:52,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:52,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:52,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 17:02:52,312 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:52,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:52,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1572558191, now seen corresponding path program 17 times [2021-06-05 17:02:52,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:52,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770165346] [2021-06-05 17:02:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:52,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:52,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770165346] [2021-06-05 17:02:52,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770165346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:52,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294163887] [2021-06-05 17:02:52,341 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:52,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:02:52,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:52,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:52,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:52,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294163887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:52,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:52,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:02:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109239104] [2021-06-05 17:02:52,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:52,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:52,439 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:52,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:52,973 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 17:02:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:02:52,973 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:52,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:52,984 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 17:02:52,985 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 17:02:52,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 303.3ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:02:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 17:02:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 17:02:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 17:02:53,006 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 17:02:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:53,006 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 17:02:53,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 17:02:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:53,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:53,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:53,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 17:02:53,221 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1791751889, now seen corresponding path program 18 times [2021-06-05 17:02:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:53,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649919629] [2021-06-05 17:02:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:53,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:53,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649919629] [2021-06-05 17:02:53,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649919629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:53,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174343780] [2021-06-05 17:02:53,253 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 17:02:53,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:02:53,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:53,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:53,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:53,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174343780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:53,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:53,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:53,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641411064] [2021-06-05 17:02:53,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:53,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:53,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:53,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:53,344 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:02:53,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:53,886 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 17:02:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:02:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 17:02:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:53,891 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 17:02:53,891 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 17:02:53,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:02:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 17:02:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 17:02:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 17:02:53,911 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 17:02:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:53,911 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 17:02:53,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:02:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 17:02:53,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:53,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:53,913 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:54,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 17:02:54,125 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash -148712735, now seen corresponding path program 19 times [2021-06-05 17:02:54,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:54,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383820683] [2021-06-05 17:02:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:54,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383820683] [2021-06-05 17:02:54,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383820683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286662506] [2021-06-05 17:02:54,159 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 17:02:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:54,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:54,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286662506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:54,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:54,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:54,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620438932] [2021-06-05 17:02:54,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:54,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:54,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:54,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:54,256 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:02:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:54,774 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 17:02:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:02:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 17:02:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:54,778 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 17:02:54,778 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 17:02:54,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:02:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 17:02:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 17:02:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 17:02:54,819 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 17:02:54,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:54,819 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 17:02:54,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:02:54,819 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 17:02:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:54,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:54,821 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 17:02:55,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 17:02:55,033 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1060998287, now seen corresponding path program 3 times [2021-06-05 17:02:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:55,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163113499] [2021-06-05 17:02:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:55,060 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 17:02:55,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:55,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163113499] [2021-06-05 17:02:55,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163113499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:55,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106997196] [2021-06-05 17:02:55,060 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:55,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:02:55,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 17:02:55,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:55,120 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 17:02:55,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106997196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:55,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:55,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 17:02:55,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750893940] [2021-06-05 17:02:55,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:02:55,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:55,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:02:55,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:02:55,121 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:55,189 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 17:02:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:02:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 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 17:02:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:55,190 INFO L225 Difference]: With dead ends: 929 [2021-06-05 17:02:55,190 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 17:02:55,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 17:02:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 17:02:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 17:02:55,201 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 17:02:55,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:55,201 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 17:02:55,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 17:02:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:55,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:55,203 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:55,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:55,421 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash -130798543, now seen corresponding path program 20 times [2021-06-05 17:02:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:55,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114590897] [2021-06-05 17:02:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:55,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:55,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114590897] [2021-06-05 17:02:55,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114590897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:55,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825682117] [2021-06-05 17:02:55,452 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 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 17:02:55,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:55,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:55,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825682117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:55,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:55,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:02:55,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202279998] [2021-06-05 17:02:55,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:02:55,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:55,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:02:55,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:02:55,520 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:55,795 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 17:02:55,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:02:55,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:02:55,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:55,797 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 17:02:55,797 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 17:02:55,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 156.9ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:02:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 17:02:55,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 17:02:55,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 17:02:55,811 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 17:02:55,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:55,811 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 17:02:55,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 17:02:55,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:55,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:55,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:56,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:56,028 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:56,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1771880909, now seen corresponding path program 21 times [2021-06-05 17:02:56,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:56,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988797706] [2021-06-05 17:02:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:56,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:56,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988797706] [2021-06-05 17:02:56,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988797706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:56,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930735366] [2021-06-05 17:02:56,051 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 17:02:56,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:56,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:56,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930735366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:56,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:56,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:02:56,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111709965] [2021-06-05 17:02:56,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:02:56,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:56,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:02:56,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:02:56,117 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:56,318 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 17:02:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:02:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:02:56,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:56,320 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 17:02:56,320 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 17:02:56,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:02:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 17:02:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 17:02:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 17:02:56,348 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 17:02:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:56,348 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 17:02:56,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 17:02:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:56,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:56,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:56,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:56,564 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:56,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:56,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1727059767, now seen corresponding path program 22 times [2021-06-05 17:02:56,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:56,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354928108] [2021-06-05 17:02:56,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:02:56,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:56,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354928108] [2021-06-05 17:02:56,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354928108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:56,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458155027] [2021-06-05 17:02:56,589 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 17:02:56,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:02:56,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:56,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:02:56,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458155027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:56,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:56,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 17:02:56,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650781841] [2021-06-05 17:02:56,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:02:56,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:56,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:02:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:02:56,649 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:56,818 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 17:02:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:02:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:02:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:56,820 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 17:02:56,820 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 17:02:56,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:02:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 17:02:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 17:02:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 17:02:56,833 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 17:02:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:56,833 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 17:02:56,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:56,833 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 17:02:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:56,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:56,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:57,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 17:02:57,041 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1970570871, now seen corresponding path program 23 times [2021-06-05 17:02:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:57,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867090819] [2021-06-05 17:02:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:57,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:57,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867090819] [2021-06-05 17:02:57,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867090819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:57,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305929472] [2021-06-05 17:02:57,068 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 17:02:57,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:02:57,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:57,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:57,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:57,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305929472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:57,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:57,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:02:57,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364382136] [2021-06-05 17:02:57,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:02:57,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:57,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:02:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:02:57,128 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:57,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:57,318 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 17:02:57,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:02:57,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:02:57,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:57,320 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 17:02:57,320 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 17:02:57,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:02:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 17:02:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 17:02:57,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 17:02:57,333 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 17:02:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:57,333 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 17:02:57,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:57,333 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 17:02:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:57,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:57,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:57,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:57,540 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1797976141, now seen corresponding path program 24 times [2021-06-05 17:02:57,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:57,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135553259] [2021-06-05 17:02:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:57,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:57,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135553259] [2021-06-05 17:02:57,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135553259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:57,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842839521] [2021-06-05 17:02:57,571 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 17:02:57,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:02:57,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:57,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842839521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:57,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:57,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:57,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141129552] [2021-06-05 17:02:57,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:57,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:57,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:57,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:57,664 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:02:58,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:58,129 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 17:02:58,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:02:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:58,132 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 17:02:58,132 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 17:02:58,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:02:58,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 17:02:58,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 17:02:58,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 17:02:58,152 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 17:02:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:58,153 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 17:02:58,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 17:02:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:58,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:58,154 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:58,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 17:02:58,364 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:58,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1930039075, now seen corresponding path program 25 times [2021-06-05 17:02:58,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:58,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171950775] [2021-06-05 17:02:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:58,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:58,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:58,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171950775] [2021-06-05 17:02:58,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171950775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:58,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498887929] [2021-06-05 17:02:58,395 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 17:02:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:58,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:58,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498887929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:58,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:58,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:02:58,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905424771] [2021-06-05 17:02:58,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:02:58,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:02:58,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:02:58,485 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:02:58,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:58,872 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 17:02:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:02:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:58,875 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 17:02:58,875 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 17:02:58,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 257.3ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:02:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 17:02:58,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 17:02:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 17:02:58,892 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 17:02:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:58,892 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 17:02:58,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:02:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 17:02:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:58,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:58,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:59,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:02:59,096 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1192582363, now seen corresponding path program 26 times [2021-06-05 17:02:59,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:59,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535000402] [2021-06-05 17:02:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:59,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:59,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535000402] [2021-06-05 17:02:59,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535000402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909730467] [2021-06-05 17:02:59,127 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 17:02:59,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:02:59,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:59,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:59,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:59,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909730467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:59,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:02:59,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732701755] [2021-06-05 17:02:59,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:59,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:59,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:59,215 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:02:59,563 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 17:02:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:02:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:02:59,567 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 17:02:59,567 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 17:02:59,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:02:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 17:02:59,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 17:02:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:02:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 17:02:59,584 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 17:02:59,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:02:59,584 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 17:02:59,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:02:59,584 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 17:02:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:02:59,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:02:59,585 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:02:59,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 17:02:59,793 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:02:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:02:59,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1273958451, now seen corresponding path program 27 times [2021-06-05 17:02:59,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:02:59,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716234813] [2021-06-05 17:02:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:02:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:02:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:59,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:02:59,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716234813] [2021-06-05 17:02:59,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716234813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122579485] [2021-06-05 17:02:59,820 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 17:02:59,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:02:59,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:02:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:02:59,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:02:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:02:59,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122579485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:02:59,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:02:59,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:02:59,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585316193] [2021-06-05 17:02:59,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:02:59,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:02:59,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:02:59,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:02:59,896 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:03:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:00,205 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 17:03:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:03:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:03:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:00,208 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 17:03:00,208 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 17:03:00,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:03:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 17:03:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 17:03:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 17:03:00,224 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 17:03:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:00,224 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 17:03:00,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:03:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 17:03:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:00,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:00,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:00,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:00,453 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2090351629, now seen corresponding path program 28 times [2021-06-05 17:03:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:00,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445942192] [2021-06-05 17:03:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:00,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:00,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445942192] [2021-06-05 17:03:00,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445942192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:00,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003888799] [2021-06-05 17:03:00,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:03:00,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:00,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:00,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003888799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:00,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:00,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:03:00,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179630556] [2021-06-05 17:03:00,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:03:00,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:00,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:03:00,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:03:00,585 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:00,910 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 17:03:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:03:00,911 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 17:03:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:00,913 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 17:03:00,913 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 17:03:00,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:03:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 17:03:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 17:03:00,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:00,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 17:03:00,930 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 17:03:00,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:00,930 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 17:03:00,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:00,930 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 17:03:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:00,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:00,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:01,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 17:03:01,141 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -447312475, now seen corresponding path program 29 times [2021-06-05 17:03:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:01,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668554313] [2021-06-05 17:03:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:01,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:01,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668554313] [2021-06-05 17:03:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668554313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:01,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972631887] [2021-06-05 17:03:01,169 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 17:03:01,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:01,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:01,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972631887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:01,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:01,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:03:01,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471741574] [2021-06-05 17:03:01,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:03:01,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:03:01,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:03:01,251 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:01,582 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 17:03:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:03:01,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 17:03:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:01,585 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 17:03:01,585 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 17:03:01,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:03:01,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 17:03:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 17:03:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:01,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 17:03:01,610 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 17:03:01,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:01,610 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 17:03:01,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:01,611 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 17:03:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:01,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:01,612 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:01,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 17:03:01,827 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 556115509, now seen corresponding path program 30 times [2021-06-05 17:03:01,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:01,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288730703] [2021-06-05 17:03:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:01,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:01,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288730703] [2021-06-05 17:03:01,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288730703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:01,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142556585] [2021-06-05 17:03:01,854 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 17:03:01,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:01,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:01,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142556585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:01,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:01,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:03:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024185038] [2021-06-05 17:03:01,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:03:01,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:03:01,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:03:01,925 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:02,215 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 17:03:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:03:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 17:03:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:02,218 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 17:03:02,218 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 17:03:02,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:03:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 17:03:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 17:03:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 17:03:02,235 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 17:03:02,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:02,235 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 17:03:02,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 17:03:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:02,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:02,236 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:02,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 17:03:02,442 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash 637491597, now seen corresponding path program 31 times [2021-06-05 17:03:02,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:02,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824078728] [2021-06-05 17:03:02,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:02,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824078728] [2021-06-05 17:03:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824078728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:02,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723765315] [2021-06-05 17:03:02,468 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 17:03:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:02,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:02,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723765315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:02,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:02,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:03:02,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309787956] [2021-06-05 17:03:02,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:03:02,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:02,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:03:02,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:03:02,541 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:02,775 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 17:03:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:03:02,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 17:03:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:02,778 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 17:03:02,778 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 17:03:02,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:03:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 17:03:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 17:03:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 17:03:02,797 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 17:03:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:02,797 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 17:03:02,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 17:03:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:02,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:02,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:03,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 17:03:03,013 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash -877600375, now seen corresponding path program 32 times [2021-06-05 17:03:03,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:03,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971160054] [2021-06-05 17:03:03,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:03,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971160054] [2021-06-05 17:03:03,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971160054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:03,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078663422] [2021-06-05 17:03:03,039 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 17:03:03,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:03,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:03,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078663422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:03,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:03,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:03:03,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096039549] [2021-06-05 17:03:03,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:03:03,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:03:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:03:03,119 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:03,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:03,311 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 17:03:03,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:03:03,311 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 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 17:03:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:03,313 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 17:03:03,313 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 17:03:03,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:03:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 17:03:03,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 17:03:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 17:03:03,327 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 17:03:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:03,327 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 17:03:03,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 17:03:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:03,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:03,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:03,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:03,529 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:03,530 INFO L82 PathProgramCache]: Analyzing trace with hash 719526341, now seen corresponding path program 33 times [2021-06-05 17:03:03,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:03,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197616139] [2021-06-05 17:03:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:03,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:03,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197616139] [2021-06-05 17:03:03,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197616139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:03,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477032425] [2021-06-05 17:03:03,559 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) [2021-06-05 17:03:03,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:03,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:03,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:03,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:03,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477032425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:03,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:03,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:03:03,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984881879] [2021-06-05 17:03:03,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:03:03,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:03,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:03:03,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:03:03,643 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:03,917 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 17:03:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:03:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 17:03:03,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:03,919 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 17:03:03,919 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 17:03:03,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:03:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 17:03:03,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 17:03:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 17:03:03,935 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 17:03:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:03,935 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 17:03:03,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 17:03:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:03,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:03,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:04,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 17:03:04,137 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1932401801, now seen corresponding path program 34 times [2021-06-05 17:03:04,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:04,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003540992] [2021-06-05 17:03:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:04,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:04,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003540992] [2021-06-05 17:03:04,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003540992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:04,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829460298] [2021-06-05 17:03:04,166 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 17:03:04,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:04,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:04,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829460298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:04,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:04,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:03:04,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472130853] [2021-06-05 17:03:04,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:03:04,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:04,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:03:04,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:03:04,248 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:04,502 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 17:03:04,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:03:04,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 24 [2021-06-05 17:03:04,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:04,504 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 17:03:04,504 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 17:03:04,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:03:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 17:03:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 17:03:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 17:03:04,520 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 17:03:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:04,520 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 17:03:04,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 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 17:03:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 17:03:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:03:04,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:04,522 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:04,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 17:03:04,722 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:04,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:04,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1095108317, now seen corresponding path program 35 times [2021-06-05 17:03:04,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:04,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209604809] [2021-06-05 17:03:04,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:04,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:04,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:04,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209604809] [2021-06-05 17:03:04,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209604809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:04,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207612663] [2021-06-05 17:03:04,754 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) [2021-06-05 17:03:04,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:04,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:03:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:04,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207612663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:04,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:04,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 17:03:04,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194091758] [2021-06-05 17:03:04,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:03:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:03:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:03:04,834 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:03:04,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:04,971 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 17:03:04,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:03:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:03:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:04,973 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 17:03:04,973 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 17:03:04,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 17:03:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 17:03:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 17:03:04,990 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 17:03:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:04,990 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 17:03:04,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 17:03:04,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 17:03:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:04,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:04,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:05,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:05,207 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1918687339, now seen corresponding path program 4 times [2021-06-05 17:03:05,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:05,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627022469] [2021-06-05 17:03:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:05,419 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 17:03:05,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627022469] [2021-06-05 17:03:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627022469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86381395] [2021-06-05 17:03:05,420 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 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 17:03:05,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:05,596 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 19 treesize of output 11 [2021-06-05 17:03:05,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:05,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:05,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:05,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:05,615 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 17:03:05,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86381395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:05,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:05,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:05,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124151791] [2021-06-05 17:03:05,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:05,616 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:06,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:06,078 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 17:03:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:03:06,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:06,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:06,080 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 17:03:06,080 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 17:03:06,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:03:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 17:03:06,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 17:03:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:06,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 17:03:06,094 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 17:03:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:06,094 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 17:03:06,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 17:03:06,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:06,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:06,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:06,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 17:03:06,296 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:06,296 INFO L82 PathProgramCache]: Analyzing trace with hash -109710677, now seen corresponding path program 5 times [2021-06-05 17:03:06,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:06,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211887116] [2021-06-05 17:03:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:06,501 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 17:03:06,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:06,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211887116] [2021-06-05 17:03:06,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211887116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:06,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508592982] [2021-06-05 17:03:06,502 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 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 17:03:06,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:06,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:06,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:06,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:06,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:06,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:06,705 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 19 treesize of output 11 [2021-06-05 17:03:06,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:06,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:06,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:06,729 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 17:03:06,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508592982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:06,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:06,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:03:06,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269933863] [2021-06-05 17:03:06,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:03:06,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:06,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:03:06,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:06,730 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:07,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:07,473 INFO L93 Difference]: Finished difference Result 1498 states and 4907 transitions. [2021-06-05 17:03:07,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:03:07,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:07,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:07,476 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 17:03:07,476 INFO L226 Difference]: Without dead ends: 1483 [2021-06-05 17:03:07,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:03:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2021-06-05 17:03:07,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1150. [2021-06-05 17:03:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 17:03:07,490 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 17:03:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:07,490 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 17:03:07,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:07,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 17:03:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:07,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:07,492 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:07,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:07,707 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:07,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1481718631, now seen corresponding path program 36 times [2021-06-05 17:03:07,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:07,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78607717] [2021-06-05 17:03:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:07,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:07,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78607717] [2021-06-05 17:03:07,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78607717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:07,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147361929] [2021-06-05 17:03:07,954 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 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 17:03:07,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:07,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:03:07,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:08,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:08,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:08,103 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 21 treesize of output 11 [2021-06-05 17:03:08,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:08,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:08,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:08,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:03:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:08,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147361929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:08,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:08,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:03:08,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628449902] [2021-06-05 17:03:08,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:08,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:08,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:08,121 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 17:03:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:09,840 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-06-05 17:03:09,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:03:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-06-05 17:03:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:09,843 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 17:03:09,843 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 17:03:09,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1638.1ms TimeCoverageRelationStatistics Valid=349, Invalid=1721, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:03:09,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 17:03:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-06-05 17:03:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 17:03:09,858 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 17:03:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:09,858 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 17:03:09,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 17:03:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 17:03:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:09,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:09,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:10,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 17:03:10,069 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:10,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:10,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2008201489, now seen corresponding path program 6 times [2021-06-05 17:03:10,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:10,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161768069] [2021-06-05 17:03:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:10,272 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 17:03:10,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:10,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161768069] [2021-06-05 17:03:10,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161768069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:10,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286771458] [2021-06-05 17:03:10,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:10,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:10,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:10,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:10,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:10,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:10,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:10,409 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 19 treesize of output 19 [2021-06-05 17:03:10,411 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:03:10,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:10,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:10,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 17:03:10,456 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 17:03:10,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286771458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:10,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:10,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:03:10,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679689721] [2021-06-05 17:03:10,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:10,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:10,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:10,457 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:11,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:11,786 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-06-05 17:03:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:03:11,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:11,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:11,788 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 17:03:11,788 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 17:03:11,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1090.3ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:03:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 17:03:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-06-05 17:03:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-05 17:03:11,804 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-05 17:03:11,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:11,804 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-05 17:03:11,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-05 17:03:11,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:11,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:11,806 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:12,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 17:03:12,017 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash -457819925, now seen corresponding path program 37 times [2021-06-05 17:03:12,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:12,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638552533] [2021-06-05 17:03:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:12,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638552533] [2021-06-05 17:03:12,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638552533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119880518] [2021-06-05 17:03:12,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:12,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:03:12,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:12,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:12,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:12,437 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 21 treesize of output 11 [2021-06-05 17:03:12,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:12,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:12,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:12,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:03:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:12,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119880518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:12,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:12,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:03:12,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746783596] [2021-06-05 17:03:12,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:12,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:12,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:12,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:12,456 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 17:03:14,323 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-05 17:03:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:14,743 INFO L93 Difference]: Finished difference Result 1869 states and 5964 transitions. [2021-06-05 17:03:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:03:14,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-06-05 17:03:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:14,746 INFO L225 Difference]: With dead ends: 1869 [2021-06-05 17:03:14,746 INFO L226 Difference]: Without dead ends: 1854 [2021-06-05 17:03:14,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 2058.0ms TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:03:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-06-05 17:03:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1206. [2021-06-05 17:03:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-05 17:03:14,761 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-05 17:03:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:14,761 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-05 17:03:14,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 17:03:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-05 17:03:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:14,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:14,763 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:14,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:14,963 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1434138769, now seen corresponding path program 38 times [2021-06-05 17:03:14,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:14,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965361066] [2021-06-05 17:03:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:15,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:15,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965361066] [2021-06-05 17:03:15,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965361066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:15,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946795724] [2021-06-05 17:03:15,147 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 17:03:15,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:15,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:15,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:15,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:15,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:15,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 59 [2021-06-05 17:03:15,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:03:15,725 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-06-05 17:03:15,725 INFO L628 ElimStorePlain]: treesize reduction 131, result has 54.2 percent of original size [2021-06-05 17:03:15,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:15,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:692 [2021-06-05 17:03:16,210 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-06-05 17:03:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:16,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946795724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:16,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:16,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 17:03:16,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098232705] [2021-06-05 17:03:16,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:03:16,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:16,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:03:16,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:03:16,408 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) 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 17:03:17,827 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2021-06-05 17:03:18,327 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-06-05 17:03:18,539 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-06-05 17:03:18,695 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2021-06-05 17:03:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:18,734 INFO L93 Difference]: Finished difference Result 2129 states and 6755 transitions. [2021-06-05 17:03:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:03:18,734 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) 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 26 [2021-06-05 17:03:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:18,737 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 17:03:18,737 INFO L226 Difference]: Without dead ends: 2114 [2021-06-05 17:03:18,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2477.0ms TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:03:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2021-06-05 17:03:18,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1219. [2021-06-05 17:03:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-06-05 17:03:18,754 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-06-05 17:03:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:18,754 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-06-05 17:03:18,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) 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 17:03:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-06-05 17:03:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:18,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:18,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:18,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 17:03:18,969 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 775761299, now seen corresponding path program 7 times [2021-06-05 17:03:18,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:18,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69776285] [2021-06-05 17:03:18,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:19,142 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 17:03:19,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:19,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69776285] [2021-06-05 17:03:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69776285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:19,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25514553] [2021-06-05 17:03:19,142 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 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 17:03:19,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:19,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:19,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:19,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:19,310 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 19 treesize of output 11 [2021-06-05 17:03:19,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:19,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:19,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:19,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:19,329 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 17:03:19,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25514553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:19,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:19,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:19,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947835829] [2021-06-05 17:03:19,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:19,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:19,330 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:19,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:19,840 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-06-05 17:03:19,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:03:19,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:19,842 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 17:03:19,842 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 17:03:19,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 529.5ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:03:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 17:03:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-06-05 17:03:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-06-05 17:03:19,857 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-06-05 17:03:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:19,857 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-06-05 17:03:19,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-06-05 17:03:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:19,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:19,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:20,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:20,059 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:20,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:20,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1252636717, now seen corresponding path program 8 times [2021-06-05 17:03:20,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:20,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801152692] [2021-06-05 17:03:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:20,216 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 17:03:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801152692] [2021-06-05 17:03:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801152692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239157560] [2021-06-05 17:03:20,216 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:03:20,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:20,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:03:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:20,405 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:20,405 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 19 treesize of output 27 [2021-06-05 17:03:20,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:03:20,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:20,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:20,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:117 [2021-06-05 17:03:20,597 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 17:03:20,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239157560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:20,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:20,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:03:20,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896835732] [2021-06-05 17:03:20,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:03:20,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:20,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:03:20,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:20,598 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 17:03:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:22,393 INFO L93 Difference]: Finished difference Result 1952 states and 6191 transitions. [2021-06-05 17:03:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:03:22,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-05 17:03:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:22,396 INFO L225 Difference]: With dead ends: 1952 [2021-06-05 17:03:22,396 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 17:03:22,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1558.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:03:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 17:03:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1241. [2021-06-05 17:03:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.356451612903226) internal successors, (4162), 1240 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4162 transitions. [2021-06-05 17:03:22,414 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4162 transitions. Word has length 26 [2021-06-05 17:03:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:22,414 INFO L482 AbstractCegarLoop]: Abstraction has 1241 states and 4162 transitions. [2021-06-05 17:03:22,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 17:03:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4162 transitions. [2021-06-05 17:03:22,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:22,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:22,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:22,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 17:03:22,616 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:22,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:22,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1104920871, now seen corresponding path program 9 times [2021-06-05 17:03:22,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:22,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525220114] [2021-06-05 17:03:22,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:22,775 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 17:03:22,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:22,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525220114] [2021-06-05 17:03:22,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525220114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:22,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803677002] [2021-06-05 17:03:22,775 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 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 17:03:22,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:22,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:03:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:22,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:22,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 17:03:22,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:22,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:22,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:22,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-06-05 17:03:22,999 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 17:03:23,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803677002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:23,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:23,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:23,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585083284] [2021-06-05 17:03:23,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:23,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:23,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:23,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:23,000 INFO L87 Difference]: Start difference. First operand 1241 states and 4162 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:23,850 INFO L93 Difference]: Finished difference Result 1876 states and 6095 transitions. [2021-06-05 17:03:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:03:23,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:23,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:23,852 INFO L225 Difference]: With dead ends: 1876 [2021-06-05 17:03:23,852 INFO L226 Difference]: Without dead ends: 1861 [2021-06-05 17:03:23,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:03:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-06-05 17:03:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1250. [2021-06-05 17:03:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 3.3610888710968774) internal successors, (4198), 1249 states have internal predecessors, (4198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4198 transitions. [2021-06-05 17:03:23,868 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4198 transitions. Word has length 26 [2021-06-05 17:03:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:23,868 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 4198 transitions. [2021-06-05 17:03:23,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4198 transitions. [2021-06-05 17:03:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:23,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:23,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:24,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:24,071 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:24,071 INFO L82 PathProgramCache]: Analyzing trace with hash 937111779, now seen corresponding path program 10 times [2021-06-05 17:03:24,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:24,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262930972] [2021-06-05 17:03:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:24,236 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 17:03:24,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:24,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262930972] [2021-06-05 17:03:24,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262930972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:24,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171175437] [2021-06-05 17:03:24,236 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 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 17:03:24,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:24,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:24,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:24,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:24,408 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 19 treesize of output 11 [2021-06-05 17:03:24,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:24,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:24,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:24,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:24,431 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 17:03:24,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171175437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:24,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:24,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:03:24,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113698487] [2021-06-05 17:03:24,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:24,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:24,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:24,432 INFO L87 Difference]: Start difference. First operand 1250 states and 4198 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:25,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:25,646 INFO L93 Difference]: Finished difference Result 2069 states and 6711 transitions. [2021-06-05 17:03:25,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:03:25,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:25,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:25,648 INFO L225 Difference]: With dead ends: 2069 [2021-06-05 17:03:25,648 INFO L226 Difference]: Without dead ends: 2054 [2021-06-05 17:03:25,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1040.7ms TimeCoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:03:25,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-06-05 17:03:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1246. [2021-06-05 17:03:25,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 17:03:25,666 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 17:03:25,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:25,666 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 17:03:25,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:25,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 17:03:25,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:25,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:25,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:25,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 17:03:25,868 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1060173529, now seen corresponding path program 11 times [2021-06-05 17:03:25,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:25,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722268405] [2021-06-05 17:03:25,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:26,036 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 17:03:26,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722268405] [2021-06-05 17:03:26,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722268405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:26,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480623875] [2021-06-05 17:03:26,037 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 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 17:03:26,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:26,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:26,238 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 19 treesize of output 11 [2021-06-05 17:03:26,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:26,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:26,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:26,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:26,262 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 17:03:26,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480623875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:26,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:26,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:03:26,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618827237] [2021-06-05 17:03:26,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:03:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:03:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:26,263 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:27,520 INFO L93 Difference]: Finished difference Result 1790 states and 5829 transitions. [2021-06-05 17:03:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:03:27,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:27,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:27,523 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 17:03:27,523 INFO L226 Difference]: Without dead ends: 1775 [2021-06-05 17:03:27,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 982.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 17:03:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-05 17:03:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1249. [2021-06-05 17:03:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 3.3621794871794872) internal successors, (4196), 1248 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4196 transitions. [2021-06-05 17:03:27,539 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4196 transitions. Word has length 26 [2021-06-05 17:03:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:27,540 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 4196 transitions. [2021-06-05 17:03:27,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4196 transitions. [2021-06-05 17:03:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:27,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:27,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:27,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 17:03:27,742 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1617260987, now seen corresponding path program 12 times [2021-06-05 17:03:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:27,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727918660] [2021-06-05 17:03:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:27,924 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 17:03:27,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:27,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727918660] [2021-06-05 17:03:27,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727918660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:27,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364238155] [2021-06-05 17:03:27,925 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 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 17:03:27,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:27,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:27,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:03:27,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:28,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:28,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:28,065 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 19 treesize of output 19 [2021-06-05 17:03:28,066 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:03:28,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:28,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:28,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:03:28,116 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 17:03:28,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364238155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:28,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:28,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:28,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264962760] [2021-06-05 17:03:28,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:28,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:28,117 INFO L87 Difference]: Start difference. First operand 1249 states and 4196 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:03:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:29,234 INFO L93 Difference]: Finished difference Result 2008 states and 6519 transitions. [2021-06-05 17:03:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:03:29,234 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 17:03:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:29,237 INFO L225 Difference]: With dead ends: 2008 [2021-06-05 17:03:29,237 INFO L226 Difference]: Without dead ends: 1993 [2021-06-05 17:03:29,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 913.6ms TimeCoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:03:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-06-05 17:03:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1246. [2021-06-05 17:03:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 3.3606425702811245) internal successors, (4184), 1245 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 4184 transitions. [2021-06-05 17:03:29,254 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 4184 transitions. Word has length 26 [2021-06-05 17:03:29,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:29,254 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 4184 transitions. [2021-06-05 17:03:29,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:03:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 4184 transitions. [2021-06-05 17:03:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:29,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:29,256 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:29,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:29,456 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:29,456 INFO L82 PathProgramCache]: Analyzing trace with hash -158392533, now seen corresponding path program 39 times [2021-06-05 17:03:29,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:29,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299389362] [2021-06-05 17:03:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:29,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:29,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:29,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299389362] [2021-06-05 17:03:29,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299389362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:29,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224121931] [2021-06-05 17:03:29,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:29,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:29,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:29,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:03:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:29,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:29,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:29,764 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 21 treesize of output 11 [2021-06-05 17:03:29,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:29,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:29,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:29,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:03:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:29,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224121931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:29,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:29,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:03:29,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683210696] [2021-06-05 17:03:29,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:29,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:29,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:29,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:29,789 INFO L87 Difference]: Start difference. First operand 1246 states and 4184 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:03:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:31,459 INFO L93 Difference]: Finished difference Result 2877 states and 8904 transitions. [2021-06-05 17:03:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:03:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 17:03:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:31,463 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 17:03:31,463 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 17:03:31,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1289.3ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:03:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 17:03:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1292. [2021-06-05 17:03:31,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.375677769171185) internal successors, (4358), 1291 states have internal predecessors, (4358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4358 transitions. [2021-06-05 17:03:31,483 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4358 transitions. Word has length 26 [2021-06-05 17:03:31,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:31,483 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4358 transitions. [2021-06-05 17:03:31,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:03:31,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4358 transitions. [2021-06-05 17:03:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:31,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:31,485 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:31,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 17:03:31,685 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1043919835, now seen corresponding path program 40 times [2021-06-05 17:03:31,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:31,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602631776] [2021-06-05 17:03:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:31,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:31,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:31,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602631776] [2021-06-05 17:03:31,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602631776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:31,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554209869] [2021-06-05 17:03:31,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:31,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:31,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:31,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:03:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:31,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:31,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:31,989 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 21 treesize of output 11 [2021-06-05 17:03:31,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:31,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:31,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:31,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:03:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:32,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554209869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:32,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:32,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:03:32,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053203084] [2021-06-05 17:03:32,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:32,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:32,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:32,014 INFO L87 Difference]: Start difference. First operand 1292 states and 4358 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:03:33,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:33,480 INFO L93 Difference]: Finished difference Result 2732 states and 8592 transitions. [2021-06-05 17:03:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:03:33,480 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 17:03:33,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:33,484 INFO L225 Difference]: With dead ends: 2732 [2021-06-05 17:03:33,484 INFO L226 Difference]: Without dead ends: 2687 [2021-06-05 17:03:33,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1207.6ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:03:33,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-06-05 17:03:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 1288. [2021-06-05 17:03:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3846153846153846) internal successors, (4356), 1287 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4356 transitions. [2021-06-05 17:03:33,513 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4356 transitions. Word has length 26 [2021-06-05 17:03:33,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:33,513 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4356 transitions. [2021-06-05 17:03:33,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:03:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4356 transitions. [2021-06-05 17:03:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:33,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:33,515 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:33,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 17:03:33,715 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:33,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:33,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1417398809, now seen corresponding path program 41 times [2021-06-05 17:03:33,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:33,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16844395] [2021-06-05 17:03:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:33,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:33,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:33,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16844395] [2021-06-05 17:03:33,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16844395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:33,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919576235] [2021-06-05 17:03:33,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:33,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:33,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:33,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:33,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:34,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:34,005 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 21 treesize of output 39 [2021-06-05 17:03:34,018 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:03:34,033 INFO L628 ElimStorePlain]: treesize reduction 19, result has 48.6 percent of original size [2021-06-05 17:03:34,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:34,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:03:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:34,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919576235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:34,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:34,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:03:34,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387338365] [2021-06-05 17:03:34,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:34,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:34,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:34,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:34,075 INFO L87 Difference]: Start difference. First operand 1288 states and 4356 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:03:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:35,918 INFO L93 Difference]: Finished difference Result 3013 states and 9417 transitions. [2021-06-05 17:03:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:03:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 17:03:35,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:35,922 INFO L225 Difference]: With dead ends: 3013 [2021-06-05 17:03:35,922 INFO L226 Difference]: Without dead ends: 2968 [2021-06-05 17:03:35,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1529.7ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:03:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2021-06-05 17:03:35,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 1292. [2021-06-05 17:03:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 3.3903950426026337) internal successors, (4377), 1291 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:35,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 4377 transitions. [2021-06-05 17:03:35,943 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 4377 transitions. Word has length 26 [2021-06-05 17:03:35,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:35,943 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 4377 transitions. [2021-06-05 17:03:35,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:03:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 4377 transitions. [2021-06-05 17:03:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:35,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:35,945 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:36,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 17:03:36,160 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:36,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1034556623, now seen corresponding path program 13 times [2021-06-05 17:03:36,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:36,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492182195] [2021-06-05 17:03:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:36,335 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 17:03:36,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:36,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492182195] [2021-06-05 17:03:36,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492182195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:36,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814608932] [2021-06-05 17:03:36,336 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 17:03:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:36,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:36,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:36,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:36,500 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 19 treesize of output 11 [2021-06-05 17:03:36,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:36,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:36,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:36,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:36,519 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 17:03:36,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814608932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:36,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:36,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760577675] [2021-06-05 17:03:36,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:36,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:36,520 INFO L87 Difference]: Start difference. First operand 1292 states and 4377 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:36,916 INFO L93 Difference]: Finished difference Result 1654 states and 5477 transitions. [2021-06-05 17:03:36,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:03:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:36,919 INFO L225 Difference]: With dead ends: 1654 [2021-06-05 17:03:36,919 INFO L226 Difference]: Without dead ends: 1639 [2021-06-05 17:03:36,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:03:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-06-05 17:03:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1309. [2021-06-05 17:03:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.385321100917431) internal successors, (4428), 1308 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4428 transitions. [2021-06-05 17:03:36,933 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4428 transitions. Word has length 26 [2021-06-05 17:03:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:36,934 INFO L482 AbstractCegarLoop]: Abstraction has 1309 states and 4428 transitions. [2021-06-05 17:03:36,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4428 transitions. [2021-06-05 17:03:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:36,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:36,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:37,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:37,137 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:37,137 INFO L82 PathProgramCache]: Analyzing trace with hash -426889313, now seen corresponding path program 14 times [2021-06-05 17:03:37,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:37,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176910353] [2021-06-05 17:03:37,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:37,315 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 17:03:37,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:37,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176910353] [2021-06-05 17:03:37,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176910353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:37,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263854268] [2021-06-05 17:03:37,316 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 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 17:03:37,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:37,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:37,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:03:37,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:37,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:37,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:37,508 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 19 treesize of output 27 [2021-06-05 17:03:37,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:03:37,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:37,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:37,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:100 [2021-06-05 17:03:37,657 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 17:03:37,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263854268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:37,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:37,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:03:37,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232009445] [2021-06-05 17:03:37,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:03:37,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:37,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:03:37,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:37,658 INFO L87 Difference]: Start difference. First operand 1309 states and 4428 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 17:03:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:39,160 INFO L93 Difference]: Finished difference Result 2013 states and 6430 transitions. [2021-06-05 17:03:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:03:39,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 26 [2021-06-05 17:03:39,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:39,162 INFO L225 Difference]: With dead ends: 2013 [2021-06-05 17:03:39,162 INFO L226 Difference]: Without dead ends: 1983 [2021-06-05 17:03:39,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1240.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:03:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-05 17:03:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1297. [2021-06-05 17:03:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.385030864197531) internal successors, (4387), 1296 states have internal predecessors, (4387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4387 transitions. [2021-06-05 17:03:39,180 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4387 transitions. Word has length 26 [2021-06-05 17:03:39,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:39,180 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4387 transitions. [2021-06-05 17:03:39,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 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 17:03:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4387 transitions. [2021-06-05 17:03:39,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:39,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:39,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:39,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:39,384 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:39,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1363716195, now seen corresponding path program 15 times [2021-06-05 17:03:39,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:39,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567557071] [2021-06-05 17:03:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:39,568 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 17:03:39,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567557071] [2021-06-05 17:03:39,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567557071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:39,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605883505] [2021-06-05 17:03:39,568 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 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 17:03:39,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:39,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:03:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:39,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:39,738 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 19 treesize of output 27 [2021-06-05 17:03:39,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:03:39,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:39,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:39,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 17:03:39,812 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 17:03:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605883505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:39,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:39,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:03:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063370769] [2021-06-05 17:03:39,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:39,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:39,813 INFO L87 Difference]: Start difference. First operand 1297 states and 4387 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:03:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:41,043 INFO L93 Difference]: Finished difference Result 2000 states and 6503 transitions. [2021-06-05 17:03:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:03:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:03:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:41,046 INFO L225 Difference]: With dead ends: 2000 [2021-06-05 17:03:41,046 INFO L226 Difference]: Without dead ends: 1985 [2021-06-05 17:03:41,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 984.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:03:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2021-06-05 17:03:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1289. [2021-06-05 17:03:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3944099378881987) internal successors, (4372), 1288 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4372 transitions. [2021-06-05 17:03:41,063 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4372 transitions. Word has length 26 [2021-06-05 17:03:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:41,063 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4372 transitions. [2021-06-05 17:03:41,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:03:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4372 transitions. [2021-06-05 17:03:41,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:41,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:41,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:41,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:41,280 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1195907103, now seen corresponding path program 16 times [2021-06-05 17:03:41,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:41,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295868217] [2021-06-05 17:03:41,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:41,455 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 17:03:41,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:41,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295868217] [2021-06-05 17:03:41,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295868217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:41,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675911694] [2021-06-05 17:03:41,456 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 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 17:03:41,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:41,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:41,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:41,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:41,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:41,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:41,619 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 19 treesize of output 11 [2021-06-05 17:03:41,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:41,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:41,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:41,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:41,643 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 17:03:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675911694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:41,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:41,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:03:41,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886814704] [2021-06-05 17:03:41,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:41,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:41,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:41,644 INFO L87 Difference]: Start difference. First operand 1289 states and 4372 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:42,644 INFO L93 Difference]: Finished difference Result 2049 states and 6731 transitions. [2021-06-05 17:03:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:03:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:42,647 INFO L225 Difference]: With dead ends: 2049 [2021-06-05 17:03:42,647 INFO L226 Difference]: Without dead ends: 2034 [2021-06-05 17:03:42,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 914.0ms TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:03:42,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2021-06-05 17:03:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1298. [2021-06-05 17:03:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.3939861218195837) internal successors, (4402), 1297 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4402 transitions. [2021-06-05 17:03:42,664 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4402 transitions. Word has length 26 [2021-06-05 17:03:42,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:42,664 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4402 transitions. [2021-06-05 17:03:42,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4402 transitions. [2021-06-05 17:03:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:42,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:42,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:42,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:42,866 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:42,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:42,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1432729289, now seen corresponding path program 17 times [2021-06-05 17:03:42,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:42,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60629359] [2021-06-05 17:03:42,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:42,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:43,050 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 17:03:43,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:43,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60629359] [2021-06-05 17:03:43,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60629359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:43,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819351444] [2021-06-05 17:03:43,050 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 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 17:03:43,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:43,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:43,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:43,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:43,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:43,232 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 19 treesize of output 11 [2021-06-05 17:03:43,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:43,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:43,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:43,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:43,253 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 17:03:43,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819351444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:43,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:43,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:03:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646477079] [2021-06-05 17:03:43,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:03:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:43,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:03:43,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:43,254 INFO L87 Difference]: Start difference. First operand 1298 states and 4402 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:44,140 INFO L93 Difference]: Finished difference Result 1774 states and 5862 transitions. [2021-06-05 17:03:44,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:03:44,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:44,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:44,142 INFO L225 Difference]: With dead ends: 1774 [2021-06-05 17:03:44,142 INFO L226 Difference]: Without dead ends: 1759 [2021-06-05 17:03:44,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:03:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-06-05 17:03:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1301. [2021-06-05 17:03:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3953846153846152) internal successors, (4414), 1300 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4414 transitions. [2021-06-05 17:03:44,158 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4414 transitions. Word has length 26 [2021-06-05 17:03:44,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:44,158 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4414 transitions. [2021-06-05 17:03:44,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:44,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4414 transitions. [2021-06-05 17:03:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:44,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:44,160 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:44,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 17:03:44,361 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2108946275, now seen corresponding path program 18 times [2021-06-05 17:03:44,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:44,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217114848] [2021-06-05 17:03:44,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:44,530 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 17:03:44,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217114848] [2021-06-05 17:03:44,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217114848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:44,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483142124] [2021-06-05 17:03:44,531 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 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 17:03:44,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:44,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:44,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:03:44,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:44,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:44,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:44,669 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 19 treesize of output 19 [2021-06-05 17:03:44,670 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:03:44,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:44,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:44,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:03:44,724 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 17:03:44,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483142124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:44,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:44,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:44,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390842803] [2021-06-05 17:03:44,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:44,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:44,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:44,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:44,725 INFO L87 Difference]: Start difference. First operand 1301 states and 4414 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 17:03:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:45,579 INFO L93 Difference]: Finished difference Result 2057 states and 6754 transitions. [2021-06-05 17:03:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:03:45,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 26 [2021-06-05 17:03:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:45,582 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 17:03:45,582 INFO L226 Difference]: Without dead ends: 2042 [2021-06-05 17:03:45,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 764.8ms TimeCoverageRelationStatistics Valid=245, Invalid=945, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:03:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-06-05 17:03:45,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1295. [2021-06-05 17:03:45,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.39258114374034) internal successors, (4390), 1294 states have internal predecessors, (4390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4390 transitions. [2021-06-05 17:03:45,600 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4390 transitions. Word has length 26 [2021-06-05 17:03:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:45,600 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4390 transitions. [2021-06-05 17:03:45,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 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 17:03:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4390 transitions. [2021-06-05 17:03:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:45,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:45,602 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:45,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:45,802 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 826223339, now seen corresponding path program 19 times [2021-06-05 17:03:45,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:45,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428841335] [2021-06-05 17:03:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:45,989 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 17:03:45,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:45,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428841335] [2021-06-05 17:03:45,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428841335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935602199] [2021-06-05 17:03:45,990 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 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 17:03:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:46,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:46,142 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 19 treesize of output 11 [2021-06-05 17:03:46,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:46,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:46,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:46,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:46,160 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 17:03:46,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935602199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:46,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:46,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:46,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705110462] [2021-06-05 17:03:46,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:46,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:46,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:46,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:46,161 INFO L87 Difference]: Start difference. First operand 1295 states and 4390 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:46,587 INFO L93 Difference]: Finished difference Result 1746 states and 5752 transitions. [2021-06-05 17:03:46,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:03:46,588 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:46,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:46,590 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 17:03:46,590 INFO L226 Difference]: Without dead ends: 1725 [2021-06-05 17:03:46,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 450.6ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:03:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-06-05 17:03:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1336. [2021-06-05 17:03:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.3872659176029964) internal successors, (4522), 1335 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:46,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4522 transitions. [2021-06-05 17:03:46,606 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4522 transitions. Word has length 26 [2021-06-05 17:03:46,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:46,606 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4522 transitions. [2021-06-05 17:03:46,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:46,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4522 transitions. [2021-06-05 17:03:46,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:46,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:46,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:46,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:46,821 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash 658414247, now seen corresponding path program 20 times [2021-06-05 17:03:46,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:46,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678065696] [2021-06-05 17:03:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:46,998 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 17:03:46,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678065696] [2021-06-05 17:03:46,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678065696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:46,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728331938] [2021-06-05 17:03:46,998 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 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 17:03:47,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:47,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 17:03:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:47,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:47,129 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 19 treesize of output 27 [2021-06-05 17:03:47,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:03:47,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:47,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:47,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 17:03:47,236 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 17:03:47,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728331938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:47,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:47,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:03:47,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937697532] [2021-06-05 17:03:47,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:47,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:47,237 INFO L87 Difference]: Start difference. First operand 1336 states and 4522 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:03:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:48,113 INFO L93 Difference]: Finished difference Result 2131 states and 6881 transitions. [2021-06-05 17:03:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:03:48,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:03:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:48,116 INFO L225 Difference]: With dead ends: 2131 [2021-06-05 17:03:48,116 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 17:03:48,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 792.5ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:03:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 17:03:48,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1348. [2021-06-05 17:03:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 3.3919821826280625) internal successors, (4569), 1347 states have internal predecessors, (4569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:48,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 4569 transitions. [2021-06-05 17:03:48,134 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 4569 transitions. Word has length 26 [2021-06-05 17:03:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:48,134 INFO L482 AbstractCegarLoop]: Abstraction has 1348 states and 4569 transitions. [2021-06-05 17:03:48,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:03:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 4569 transitions. [2021-06-05 17:03:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:48,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:48,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:48,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:48,337 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:48,337 INFO L82 PathProgramCache]: Analyzing trace with hash 957187695, now seen corresponding path program 21 times [2021-06-05 17:03:48,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:48,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235622259] [2021-06-05 17:03:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:48,520 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 17:03:48,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235622259] [2021-06-05 17:03:48,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235622259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:48,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570891612] [2021-06-05 17:03:48,520 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 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 17:03:48,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:03:48,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:48,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:48,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:48,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:48,658 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 19 treesize of output 27 [2021-06-05 17:03:48,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:03:48,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:48,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:48,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 17:03:48,772 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 17:03:48,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570891612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:48,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:48,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:03:48,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101497603] [2021-06-05 17:03:48,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:48,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:48,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:48,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:48,773 INFO L87 Difference]: Start difference. First operand 1348 states and 4569 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:03:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:49,500 INFO L93 Difference]: Finished difference Result 1900 states and 6269 transitions. [2021-06-05 17:03:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:03:49,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:03:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:49,503 INFO L225 Difference]: With dead ends: 1900 [2021-06-05 17:03:49,503 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 17:03:49,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:03:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 17:03:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1361. [2021-06-05 17:03:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.398529411764706) internal successors, (4622), 1360 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4622 transitions. [2021-06-05 17:03:49,519 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4622 transitions. Word has length 26 [2021-06-05 17:03:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:49,520 INFO L482 AbstractCegarLoop]: Abstraction has 1361 states and 4622 transitions. [2021-06-05 17:03:49,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:03:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4622 transitions. [2021-06-05 17:03:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:49,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:49,521 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:49,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:49,722 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:49,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:49,722 INFO L82 PathProgramCache]: Analyzing trace with hash 423152783, now seen corresponding path program 22 times [2021-06-05 17:03:49,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:49,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937522586] [2021-06-05 17:03:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:49,906 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 17:03:49,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:49,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937522586] [2021-06-05 17:03:49,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937522586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:49,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107041847] [2021-06-05 17:03:49,907 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:49,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:03:49,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:49,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:49,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:50,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:50,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:50,071 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 19 treesize of output 11 [2021-06-05 17:03:50,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:50,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:50,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:50,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:50,091 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 17:03:50,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107041847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:50,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:50,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:50,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720355240] [2021-06-05 17:03:50,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:50,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:50,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:50,092 INFO L87 Difference]: Start difference. First operand 1361 states and 4622 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 17:03:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:50,485 INFO L93 Difference]: Finished difference Result 1726 states and 5748 transitions. [2021-06-05 17:03:50,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:03:50,486 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 17:03:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:50,488 INFO L225 Difference]: With dead ends: 1726 [2021-06-05 17:03:50,488 INFO L226 Difference]: Without dead ends: 1711 [2021-06-05 17:03:50,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:03:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-05 17:03:50,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1372. [2021-06-05 17:03:50,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.3982494529540483) internal successors, (4659), 1371 states have internal predecessors, (4659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:50,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4659 transitions. [2021-06-05 17:03:50,503 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4659 transitions. Word has length 26 [2021-06-05 17:03:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:50,504 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4659 transitions. [2021-06-05 17:03:50,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 17:03:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4659 transitions. [2021-06-05 17:03:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:50,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:50,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:50,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 17:03:50,707 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:50,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:50,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1194379997, now seen corresponding path program 23 times [2021-06-05 17:03:50,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:50,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446458813] [2021-06-05 17:03:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:50,869 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 17:03:50,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446458813] [2021-06-05 17:03:50,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446458813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:50,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269551893] [2021-06-05 17:03:50,869 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:03:50,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:03:50,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:50,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:03:50,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:51,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:51,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:51,058 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 19 treesize of output 19 [2021-06-05 17:03:51,059 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:03:51,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:51,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:51,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 17:03:51,116 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 17:03:51,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269551893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:51,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:51,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:03:51,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680874228] [2021-06-05 17:03:51,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:03:51,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:51,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:03:51,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:03:51,117 INFO L87 Difference]: Start difference. First operand 1372 states and 4659 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 17:03:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:51,909 INFO L93 Difference]: Finished difference Result 2060 states and 6782 transitions. [2021-06-05 17:03:51,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:03:51,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 17:03:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:51,912 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 17:03:51,912 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 17:03:51,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 708.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:03:51,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 17:03:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1373. [2021-06-05 17:03:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1373 states, 1372 states have (on average 3.401603498542274) internal successors, (4667), 1372 states have internal predecessors, (4667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1373 states to 1373 states and 4667 transitions. [2021-06-05 17:03:51,930 INFO L78 Accepts]: Start accepts. Automaton has 1373 states and 4667 transitions. Word has length 26 [2021-06-05 17:03:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:51,931 INFO L482 AbstractCegarLoop]: Abstraction has 1373 states and 4667 transitions. [2021-06-05 17:03:51,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 17:03:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1373 states and 4667 transitions. [2021-06-05 17:03:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:51,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:51,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:52,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:52,137 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:52,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:52,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1410644395, now seen corresponding path program 24 times [2021-06-05 17:03:52,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:52,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500141994] [2021-06-05 17:03:52,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:52,306 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 17:03:52,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:52,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500141994] [2021-06-05 17:03:52,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500141994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:52,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814672155] [2021-06-05 17:03:52,306 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 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 17:03:52,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:52,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:03:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:52,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:52,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:52,443 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 19 treesize of output 19 [2021-06-05 17:03:52,444 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:03:52,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:52,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:52,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 17:03:52,487 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 17:03:52,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814672155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:52,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:52,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:03:52,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667801127] [2021-06-05 17:03:52,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:03:52,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:52,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:03:52,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:03:52,488 INFO L87 Difference]: Start difference. First operand 1373 states and 4667 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:53,120 INFO L93 Difference]: Finished difference Result 1917 states and 6334 transitions. [2021-06-05 17:03:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:03:53,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:03:53,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:53,123 INFO L225 Difference]: With dead ends: 1917 [2021-06-05 17:03:53,123 INFO L226 Difference]: Without dead ends: 1892 [2021-06-05 17:03:53,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:03:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-06-05 17:03:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1379. [2021-06-05 17:03:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 3.399854862119013) internal successors, (4685), 1378 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 4685 transitions. [2021-06-05 17:03:53,140 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 4685 transitions. Word has length 26 [2021-06-05 17:03:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:53,140 INFO L482 AbstractCegarLoop]: Abstraction has 1379 states and 4685 transitions. [2021-06-05 17:03:53,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 4685 transitions. [2021-06-05 17:03:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:53,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:53,142 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:53,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:53,342 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:53,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1510554133, now seen corresponding path program 42 times [2021-06-05 17:03:53,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:53,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555669347] [2021-06-05 17:03:53,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:53,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555669347] [2021-06-05 17:03:53,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555669347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:53,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060277124] [2021-06-05 17:03:53,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:03:53,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:03:53,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:53,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:03:53,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:53,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:53,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:53,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:53,708 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 21 treesize of output 11 [2021-06-05 17:03:53,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:53,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:53,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:53,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:03:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:53,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060277124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:53,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:53,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:03:53,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851566442] [2021-06-05 17:03:53,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:53,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:53,725 INFO L87 Difference]: Start difference. First operand 1379 states and 4685 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:03:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:54,479 INFO L93 Difference]: Finished difference Result 1799 states and 5934 transitions. [2021-06-05 17:03:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:03:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 17:03:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:54,481 INFO L225 Difference]: With dead ends: 1799 [2021-06-05 17:03:54,481 INFO L226 Difference]: Without dead ends: 1773 [2021-06-05 17:03:54,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 719.3ms TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:03:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-06-05 17:03:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1391. [2021-06-05 17:03:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-06-05 17:03:54,497 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-06-05 17:03:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:54,497 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-06-05 17:03:54,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:03:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-06-05 17:03:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:54,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:54,499 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:54,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:54,700 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:54,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:54,700 INFO L82 PathProgramCache]: Analyzing trace with hash -442679569, now seen corresponding path program 43 times [2021-06-05 17:03:54,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:54,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773978416] [2021-06-05 17:03:54,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:54,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:54,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773978416] [2021-06-05 17:03:54,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773978416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:54,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713701890] [2021-06-05 17:03:54,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:54,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:03:54,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:55,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:55,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:55,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:55,057 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 21 treesize of output 11 [2021-06-05 17:03:55,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:55,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:55,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:55,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:03:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:55,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713701890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:55,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:55,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:03:55,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858596905] [2021-06-05 17:03:55,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:55,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:55,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:55,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:55,081 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:03:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:56,047 INFO L93 Difference]: Finished difference Result 1991 states and 6577 transitions. [2021-06-05 17:03:56,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:03:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 17:03:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:56,050 INFO L225 Difference]: With dead ends: 1991 [2021-06-05 17:03:56,050 INFO L226 Difference]: Without dead ends: 1976 [2021-06-05 17:03:56,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 882.8ms TimeCoverageRelationStatistics Valid=336, Invalid=1386, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:03:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-05 17:03:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1391. [2021-06-05 17:03:56,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 1390 states have (on average 3.3949640287769784) internal successors, (4719), 1390 states have internal predecessors, (4719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 4719 transitions. [2021-06-05 17:03:56,067 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 4719 transitions. Word has length 26 [2021-06-05 17:03:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:56,067 INFO L482 AbstractCegarLoop]: Abstraction has 1391 states and 4719 transitions. [2021-06-05 17:03:56,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:03:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 4719 transitions. [2021-06-05 17:03:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:56,068 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:56,068 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:03:56,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:03:56,269 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1031054993, now seen corresponding path program 25 times [2021-06-05 17:03:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:56,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580810224] [2021-06-05 17:03:56,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:56,442 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 17:03:56,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:56,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580810224] [2021-06-05 17:03:56,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580810224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:56,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755933375] [2021-06-05 17:03:56,442 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 17:03:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:56,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:56,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:56,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:03:56,587 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 19 treesize of output 11 [2021-06-05 17:03:56,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:03:56,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:56,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:56,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:03:56,607 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 17:03:56,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755933375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:56,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:56,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:03:56,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581301042] [2021-06-05 17:03:56,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:03:56,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:03:56,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:03:56,607 INFO L87 Difference]: Start difference. First operand 1391 states and 4719 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 17:03:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:57,210 INFO L93 Difference]: Finished difference Result 1897 states and 6187 transitions. [2021-06-05 17:03:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:03:57,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 17:03:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:57,213 INFO L225 Difference]: With dead ends: 1897 [2021-06-05 17:03:57,213 INFO L226 Difference]: Without dead ends: 1882 [2021-06-05 17:03:57,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:03:57,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-06-05 17:03:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1402. [2021-06-05 17:03:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.3954318344039973) internal successors, (4757), 1401 states have internal predecessors, (4757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:57,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4757 transitions. [2021-06-05 17:03:57,231 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4757 transitions. Word has length 26 [2021-06-05 17:03:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:57,231 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4757 transitions. [2021-06-05 17:03:57,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 17:03:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4757 transitions. [2021-06-05 17:03:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:57,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:57,232 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:57,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 17:03:57,433 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash 519326571, now seen corresponding path program 44 times [2021-06-05 17:03:57,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:57,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585381542] [2021-06-05 17:03:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:57,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:57,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585381542] [2021-06-05 17:03:57,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585381542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:57,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335126169] [2021-06-05 17:03:57,649 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 17:03:57,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:03:57,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:57,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:03:57,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:03:57,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:03:57,839 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 21 treesize of output 37 [2021-06-05 17:03:57,843 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:03:57,856 INFO L628 ElimStorePlain]: treesize reduction 13, result has 60.6 percent of original size [2021-06-05 17:03:57,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:03:57,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2021-06-05 17:03:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:57,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335126169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:57,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:03:57,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 17:03:57,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100316230] [2021-06-05 17:03:57,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 17:03:57,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:03:57,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 17:03:57,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:03:57,898 INFO L87 Difference]: Start difference. First operand 1402 states and 4757 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 17:03:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:03:59,490 INFO L93 Difference]: Finished difference Result 2292 states and 7266 transitions. [2021-06-05 17:03:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:03:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 26 [2021-06-05 17:03:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:03:59,493 INFO L225 Difference]: With dead ends: 2292 [2021-06-05 17:03:59,493 INFO L226 Difference]: Without dead ends: 2248 [2021-06-05 17:03:59,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1393.5ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:03:59,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-06-05 17:03:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 1409. [2021-06-05 17:03:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.3963068181818183) internal successors, (4782), 1408 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:03:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4782 transitions. [2021-06-05 17:03:59,511 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4782 transitions. Word has length 26 [2021-06-05 17:03:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:03:59,511 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4782 transitions. [2021-06-05 17:03:59,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 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 17:03:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4782 transitions. [2021-06-05 17:03:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:03:59,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:03:59,513 INFO L521 BasicCegarLoop]: trace histogram [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 17:03:59,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 17:03:59,713 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:03:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:03:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash -456992273, now seen corresponding path program 45 times [2021-06-05 17:03:59,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:03:59,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408728041] [2021-06-05 17:03:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:03:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:03:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:03:59,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:03:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408728041] [2021-06-05 17:03:59,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408728041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:03:59,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909791917] [2021-06-05 17:03:59,885 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 17:03:59,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:03:59,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:03:59,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:03:59,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:00,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:00,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:00,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:00,071 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 21 treesize of output 37 [2021-06-05 17:04:00,076 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:04:00,095 INFO L628 ElimStorePlain]: treesize reduction 15, result has 60.5 percent of original size [2021-06-05 17:04:00,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:00,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:35 [2021-06-05 17:04:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:00,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909791917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:00,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:00,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 17:04:00,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429864045] [2021-06-05 17:04:00,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:04:00,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:00,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:04:00,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:04:00,161 INFO L87 Difference]: Start difference. First operand 1409 states and 4782 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 17:04:01,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:01,483 INFO L93 Difference]: Finished difference Result 2493 states and 8039 transitions. [2021-06-05 17:04:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:04:01,483 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 26 [2021-06-05 17:04:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:01,486 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 17:04:01,486 INFO L226 Difference]: Without dead ends: 2478 [2021-06-05 17:04:01,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1121.9ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:04:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-05 17:04:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 1419. [2021-06-05 17:04:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3970380818053596) internal successors, (4817), 1418 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4817 transitions. [2021-06-05 17:04:01,506 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4817 transitions. Word has length 26 [2021-06-05 17:04:01,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:01,506 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4817 transitions. [2021-06-05 17:04:01,506 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 17:04:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4817 transitions. [2021-06-05 17:04:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:01,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:01,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:01,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:01,709 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:01,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:01,710 INFO L82 PathProgramCache]: Analyzing trace with hash 558815383, now seen corresponding path program 26 times [2021-06-05 17:04:01,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:01,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019320366] [2021-06-05 17:04:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:01,878 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 17:04:01,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019320366] [2021-06-05 17:04:01,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019320366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:01,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464753855] [2021-06-05 17:04:01,878 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 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 17:04:01,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:01,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:04:01,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:02,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:02,060 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 29 treesize of output 35 [2021-06-05 17:04:02,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:02,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:02,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:02,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:105 [2021-06-05 17:04:02,183 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 17:04:02,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464753855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:02,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:02,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:04:02,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302770017] [2021-06-05 17:04:02,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:02,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:02,184 INFO L87 Difference]: Start difference. First operand 1419 states and 4817 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 17:04:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:04,027 INFO L93 Difference]: Finished difference Result 2315 states and 7376 transitions. [2021-06-05 17:04:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:04:04,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-05 17:04:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:04,030 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 17:04:04,030 INFO L226 Difference]: Without dead ends: 2281 [2021-06-05 17:04:04,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1548.5ms TimeCoverageRelationStatistics Valid=399, Invalid=1953, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:04:04,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-05 17:04:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1435. [2021-06-05 17:04:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.406555090655509) internal successors, (4885), 1434 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4885 transitions. [2021-06-05 17:04:04,049 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4885 transitions. Word has length 26 [2021-06-05 17:04:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:04,049 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4885 transitions. [2021-06-05 17:04:04,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 17:04:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4885 transitions. [2021-06-05 17:04:04,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:04,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:04,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:04,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:04,266 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:04,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:04,266 INFO L82 PathProgramCache]: Analyzing trace with hash -491765317, now seen corresponding path program 27 times [2021-06-05 17:04:04,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:04,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087127798] [2021-06-05 17:04:04,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:04,399 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 17:04:04,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:04,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087127798] [2021-06-05 17:04:04,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087127798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:04,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335321470] [2021-06-05 17:04:04,399 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 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 17:04:04,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:04,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:04,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:04,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:04,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:04,546 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 19 treesize of output 27 [2021-06-05 17:04:04,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:04,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:04,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:04,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:65 [2021-06-05 17:04:04,639 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 17:04:04,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335321470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:04,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:04,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:04,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363152832] [2021-06-05 17:04:04,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:04,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:04,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:04,640 INFO L87 Difference]: Start difference. First operand 1435 states and 4885 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:04:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:05,746 INFO L93 Difference]: Finished difference Result 2365 states and 7650 transitions. [2021-06-05 17:04:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:04:05,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 17:04:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:05,749 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 17:04:05,749 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 17:04:05,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 816.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:04:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 17:04:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1429. [2021-06-05 17:04:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.40406162464986) internal successors, (4861), 1428 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4861 transitions. [2021-06-05 17:04:05,769 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4861 transitions. Word has length 26 [2021-06-05 17:04:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:05,769 INFO L482 AbstractCegarLoop]: Abstraction has 1429 states and 4861 transitions. [2021-06-05 17:04:05,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:04:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4861 transitions. [2021-06-05 17:04:05,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:05,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:05,771 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:05,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:05,972 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 745320095, now seen corresponding path program 46 times [2021-06-05 17:04:05,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:05,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458293870] [2021-06-05 17:04:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:06,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458293870] [2021-06-05 17:04:06,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458293870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:06,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600181271] [2021-06-05 17:04:06,135 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 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 17:04:06,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:06,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:06,262 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 21 treesize of output 11 [2021-06-05 17:04:06,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:06,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:06,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:06,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:04:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:06,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600181271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:06,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:06,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:04:06,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143349172] [2021-06-05 17:04:06,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:06,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:06,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:06,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:06,284 INFO L87 Difference]: Start difference. First operand 1429 states and 4861 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:04:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:07,619 INFO L93 Difference]: Finished difference Result 3028 states and 9674 transitions. [2021-06-05 17:04:07,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:04:07,619 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 17:04:07,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:07,623 INFO L225 Difference]: With dead ends: 3028 [2021-06-05 17:04:07,623 INFO L226 Difference]: Without dead ends: 2992 [2021-06-05 17:04:07,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1081.7ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:04:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-06-05 17:04:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 1562. [2021-06-05 17:04:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.42152466367713) internal successors, (5341), 1561 states have internal predecessors, (5341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5341 transitions. [2021-06-05 17:04:07,647 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5341 transitions. Word has length 26 [2021-06-05 17:04:07,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:07,647 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 5341 transitions. [2021-06-05 17:04:07,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:04:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5341 transitions. [2021-06-05 17:04:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:07,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:07,649 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:07,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:07,849 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:07,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:07,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1715998549, now seen corresponding path program 47 times [2021-06-05 17:04:07,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:07,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068017907] [2021-06-05 17:04:07,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:08,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:08,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068017907] [2021-06-05 17:04:08,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068017907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:08,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288136034] [2021-06-05 17:04:08,024 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 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 17:04:08,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:08,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:08,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:04:08,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:08,147 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:08,147 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 21 treesize of output 39 [2021-06-05 17:04:08,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:08,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:08,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:08,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:04:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:08,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288136034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:08,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:08,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 17:04:08,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439084492] [2021-06-05 17:04:08,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:08,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:08,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:08,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:08,203 INFO L87 Difference]: Start difference. First operand 1562 states and 5341 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:04:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:09,798 INFO L93 Difference]: Finished difference Result 3412 states and 10776 transitions. [2021-06-05 17:04:09,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:04:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 26 [2021-06-05 17:04:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:09,802 INFO L225 Difference]: With dead ends: 3412 [2021-06-05 17:04:09,802 INFO L226 Difference]: Without dead ends: 3355 [2021-06-05 17:04:09,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1337.0ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:04:09,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3355 states. [2021-06-05 17:04:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3355 to 1585. [2021-06-05 17:04:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.4242424242424243) internal successors, (5424), 1584 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5424 transitions. [2021-06-05 17:04:09,827 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5424 transitions. Word has length 26 [2021-06-05 17:04:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:09,827 INFO L482 AbstractCegarLoop]: Abstraction has 1585 states and 5424 transitions. [2021-06-05 17:04:09,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 17:04:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5424 transitions. [2021-06-05 17:04:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:09,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:09,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:10,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 17:04:10,030 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash 701456227, now seen corresponding path program 28 times [2021-06-05 17:04:10,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:10,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770575102] [2021-06-05 17:04:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:10,191 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 17:04:10,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770575102] [2021-06-05 17:04:10,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770575102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437899231] [2021-06-05 17:04:10,192 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 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 17:04:10,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:10,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:10,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:10,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:10,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:10,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 17:04:10,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:10,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:10,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:10,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:04:10,378 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 17:04:10,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437899231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:10,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:10,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:10,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538531651] [2021-06-05 17:04:10,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:10,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:10,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:10,379 INFO L87 Difference]: Start difference. First operand 1585 states and 5424 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 17:04:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:10,954 INFO L93 Difference]: Finished difference Result 2011 states and 6730 transitions. [2021-06-05 17:04:10,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:04:10,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 26 [2021-06-05 17:04:10,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:10,957 INFO L225 Difference]: With dead ends: 2011 [2021-06-05 17:04:10,957 INFO L226 Difference]: Without dead ends: 1996 [2021-06-05 17:04:10,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=198, Invalid=732, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:04:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-06-05 17:04:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1593. [2021-06-05 17:04:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.423994974874372) internal successors, (5451), 1592 states have internal predecessors, (5451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5451 transitions. [2021-06-05 17:04:10,974 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5451 transitions. Word has length 26 [2021-06-05 17:04:10,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:10,974 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5451 transitions. [2021-06-05 17:04:10,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 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 17:04:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5451 transitions. [2021-06-05 17:04:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:10,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:10,976 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:11,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 17:04:11,177 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash -916076553, now seen corresponding path program 29 times [2021-06-05 17:04:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:11,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49604933] [2021-06-05 17:04:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:11,303 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 17:04:11,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:11,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49604933] [2021-06-05 17:04:11,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49604933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:11,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648084936] [2021-06-05 17:04:11,303 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 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 17:04:11,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:11,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:11,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:11,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:11,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:11,466 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 19 treesize of output 19 [2021-06-05 17:04:11,467 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:11,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:11,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:11,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 17:04:11,510 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 17:04:11,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648084936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:11,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:11,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:04:11,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704744364] [2021-06-05 17:04:11,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:11,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:11,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:11,511 INFO L87 Difference]: Start difference. First operand 1593 states and 5451 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 17:04:12,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:12,322 INFO L93 Difference]: Finished difference Result 2467 states and 8081 transitions. [2021-06-05 17:04:12,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:04:12,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 17:04:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:12,325 INFO L225 Difference]: With dead ends: 2467 [2021-06-05 17:04:12,325 INFO L226 Difference]: Without dead ends: 2448 [2021-06-05 17:04:12,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:04:12,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2021-06-05 17:04:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 1588. [2021-06-05 17:04:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.421550094517958) internal successors, (5430), 1587 states have internal predecessors, (5430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5430 transitions. [2021-06-05 17:04:12,346 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5430 transitions. Word has length 26 [2021-06-05 17:04:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:12,346 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 5430 transitions. [2021-06-05 17:04:12,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 17:04:12,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5430 transitions. [2021-06-05 17:04:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:12,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:12,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:12,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 17:04:12,564 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:12,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1121995759, now seen corresponding path program 30 times [2021-06-05 17:04:12,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:12,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694249728] [2021-06-05 17:04:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:12,694 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 17:04:12,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:12,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694249728] [2021-06-05 17:04:12,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694249728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786915795] [2021-06-05 17:04:12,694 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 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 17:04:12,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:12,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:12,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2021-06-05 17:04:12,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:12,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:12,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:12,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:89 [2021-06-05 17:04:12,965 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 17:04:12,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786915795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:12,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:12,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:04:12,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267224869] [2021-06-05 17:04:12,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:12,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:12,965 INFO L87 Difference]: Start difference. First operand 1588 states and 5430 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 17:04:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:14,540 INFO L93 Difference]: Finished difference Result 2521 states and 8150 transitions. [2021-06-05 17:04:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:04:14,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 26 [2021-06-05 17:04:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:14,543 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 17:04:14,543 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 17:04:14,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1302.3ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:04:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 17:04:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1576. [2021-06-05 17:04:14,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.420952380952381) internal successors, (5388), 1575 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:14,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5388 transitions. [2021-06-05 17:04:14,565 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5388 transitions. Word has length 26 [2021-06-05 17:04:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:14,565 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5388 transitions. [2021-06-05 17:04:14,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 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 17:04:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5388 transitions. [2021-06-05 17:04:14,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:14,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:14,567 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:14,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 17:04:14,767 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash -275202939, now seen corresponding path program 48 times [2021-06-05 17:04:14,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:14,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777729521] [2021-06-05 17:04:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:14,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:14,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777729521] [2021-06-05 17:04:14,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777729521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:14,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022173181] [2021-06-05 17:04:14,983 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 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 17:04:15,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:04:15,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:15,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:15,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:15,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:15,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:15,151 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 21 treesize of output 11 [2021-06-05 17:04:15,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:15,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:15,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:15,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:04:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:15,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022173181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:15,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:15,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:04:15,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022254957] [2021-06-05 17:04:15,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:15,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:15,168 INFO L87 Difference]: Start difference. First operand 1576 states and 5388 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:04:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:16,045 INFO L93 Difference]: Finished difference Result 2032 states and 6722 transitions. [2021-06-05 17:04:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:04:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 17:04:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:16,048 INFO L225 Difference]: With dead ends: 2032 [2021-06-05 17:04:16,048 INFO L226 Difference]: Without dead ends: 2010 [2021-06-05 17:04:16,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 829.5ms TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2021-06-05 17:04:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1568. [2021-06-05 17:04:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-06-05 17:04:16,072 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-06-05 17:04:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:16,072 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-06-05 17:04:16,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:04:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-06-05 17:04:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:16,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:16,074 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:16,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 17:04:16,274 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash 650290927, now seen corresponding path program 49 times [2021-06-05 17:04:16,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:16,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66181155] [2021-06-05 17:04:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:16,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:16,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66181155] [2021-06-05 17:04:16,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66181155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205540588] [2021-06-05 17:04:16,487 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 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 17:04:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:16,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:16,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:16,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:16,617 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 21 treesize of output 11 [2021-06-05 17:04:16,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:16,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:16,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:16,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:04:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:16,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205540588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:16,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:16,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:04:16,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081632584] [2021-06-05 17:04:16,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:16,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:16,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:16,640 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:04:17,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:17,798 INFO L93 Difference]: Finished difference Result 2234 states and 7397 transitions. [2021-06-05 17:04:17,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:04:17,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 17:04:17,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:17,802 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 17:04:17,802 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 17:04:17,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1013.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1649, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:04:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 17:04:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1568. [2021-06-05 17:04:17,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.4205488194001274) internal successors, (5360), 1567 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5360 transitions. [2021-06-05 17:04:17,821 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5360 transitions. Word has length 26 [2021-06-05 17:04:17,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:17,821 INFO L482 AbstractCegarLoop]: Abstraction has 1568 states and 5360 transitions. [2021-06-05 17:04:17,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:04:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5360 transitions. [2021-06-05 17:04:17,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:17,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:17,823 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:18,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 17:04:18,025 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:18,025 INFO L82 PathProgramCache]: Analyzing trace with hash -527613613, now seen corresponding path program 50 times [2021-06-05 17:04:18,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:18,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712282753] [2021-06-05 17:04:18,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:18,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712282753] [2021-06-05 17:04:18,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712282753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275063770] [2021-06-05 17:04:18,203 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 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 17:04:18,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:18,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:18,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:18,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:18,358 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 25 treesize of output 43 [2021-06-05 17:04:18,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:18,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:18,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:18,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 17:04:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:18,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275063770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:18,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:18,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 17:04:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782097438] [2021-06-05 17:04:18,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:18,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:18,405 INFO L87 Difference]: Start difference. First operand 1568 states and 5360 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 17:04:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:21,728 INFO L93 Difference]: Finished difference Result 2979 states and 9505 transitions. [2021-06-05 17:04:21,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:04:21,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 26 [2021-06-05 17:04:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:21,732 INFO L225 Difference]: With dead ends: 2979 [2021-06-05 17:04:21,732 INFO L226 Difference]: Without dead ends: 2932 [2021-06-05 17:04:21,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 2792.0ms TimeCoverageRelationStatistics Valid=1084, Invalid=6056, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:04:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2932 states. [2021-06-05 17:04:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2932 to 1584. [2021-06-05 17:04:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.4112444725205306) internal successors, (5400), 1583 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:21,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5400 transitions. [2021-06-05 17:04:21,756 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5400 transitions. Word has length 26 [2021-06-05 17:04:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:21,756 INFO L482 AbstractCegarLoop]: Abstraction has 1584 states and 5400 transitions. [2021-06-05 17:04:21,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 17:04:21,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5400 transitions. [2021-06-05 17:04:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:21,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:21,758 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:21,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 17:04:21,958 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2073850769, now seen corresponding path program 51 times [2021-06-05 17:04:21,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:21,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887169439] [2021-06-05 17:04:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:22,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:22,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:22,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887169439] [2021-06-05 17:04:22,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887169439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:22,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112815855] [2021-06-05 17:04:22,141 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 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 17:04:22,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:04:22,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:22,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 17:04:22,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:22,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:22,343 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 51 [2021-06-05 17:04:22,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:22,482 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-06-05 17:04:22,483 INFO L628 ElimStorePlain]: treesize reduction 66, result has 54.8 percent of original size [2021-06-05 17:04:22,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:22,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:214 [2021-06-05 17:04:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:22,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112815855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:22,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:22,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 17:04:22,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658234253] [2021-06-05 17:04:22,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:04:22,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:04:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:04:22,785 INFO L87 Difference]: Start difference. First operand 1584 states and 5400 transitions. Second operand has 23 states, 23 states have (on average 2.0) 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 17:04:24,013 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-06-05 17:04:24,339 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-06-05 17:04:24,525 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 17:04:24,822 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-06-05 17:04:25,045 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-05 17:04:25,190 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2021-06-05 17:04:25,446 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2021-06-05 17:04:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:25,508 INFO L93 Difference]: Finished difference Result 2665 states and 8672 transitions. [2021-06-05 17:04:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:04:25,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) 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 26 [2021-06-05 17:04:25,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:25,511 INFO L225 Difference]: With dead ends: 2665 [2021-06-05 17:04:25,511 INFO L226 Difference]: Without dead ends: 2635 [2021-06-05 17:04:25,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2551.2ms TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:04:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-06-05 17:04:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1595. [2021-06-05 17:04:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.417189460476788) internal successors, (5447), 1594 states have internal predecessors, (5447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5447 transitions. [2021-06-05 17:04:25,533 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5447 transitions. Word has length 26 [2021-06-05 17:04:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:25,533 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5447 transitions. [2021-06-05 17:04:25,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) 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 17:04:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5447 transitions. [2021-06-05 17:04:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:25,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:25,535 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:25,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:25,735 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash 436262311, now seen corresponding path program 52 times [2021-06-05 17:04:25,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:25,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015029587] [2021-06-05 17:04:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:25,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:25,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:25,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015029587] [2021-06-05 17:04:25,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015029587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:25,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526735696] [2021-06-05 17:04:25,934 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 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 17:04:25,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:25,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:26,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:26,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:26,089 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 21 treesize of output 11 [2021-06-05 17:04:26,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:26,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:26,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:26,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:04:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526735696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:26,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:26,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:04:26,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872093801] [2021-06-05 17:04:26,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:26,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:26,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:26,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:26,109 INFO L87 Difference]: Start difference. First operand 1595 states and 5447 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 17:04:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:27,371 INFO L93 Difference]: Finished difference Result 2141 states and 7071 transitions. [2021-06-05 17:04:27,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 17:04:27,371 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 17:04:27,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:27,374 INFO L225 Difference]: With dead ends: 2141 [2021-06-05 17:04:27,374 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 17:04:27,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1057.3ms TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:04:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 17:04:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1599. [2021-06-05 17:04:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:27,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-06-05 17:04:27,393 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-06-05 17:04:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:27,393 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-06-05 17:04:27,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 17:04:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-06-05 17:04:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:27,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:27,395 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:27,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 17:04:27,595 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:27,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:27,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2135160291, now seen corresponding path program 53 times [2021-06-05 17:04:27,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:27,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946422717] [2021-06-05 17:04:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:27,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946422717] [2021-06-05 17:04:27,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946422717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226693140] [2021-06-05 17:04:27,778 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 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 17:04:27,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:04:27,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:27,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:27,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:27,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:27,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:27,969 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 21 treesize of output 39 [2021-06-05 17:04:27,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:27,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:27,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:27,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 17:04:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:28,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226693140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:28,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:28,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 17:04:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33910934] [2021-06-05 17:04:28,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:04:28,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:04:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:04:28,026 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:29,051 INFO L93 Difference]: Finished difference Result 2310 states and 7701 transitions. [2021-06-05 17:04:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:04:29,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:04:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:29,054 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 17:04:29,054 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 17:04:29,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 845.8ms TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:29,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 17:04:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1599. [2021-06-05 17:04:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4173967459324155) internal successors, (5461), 1598 states have internal predecessors, (5461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5461 transitions. [2021-06-05 17:04:29,073 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5461 transitions. Word has length 26 [2021-06-05 17:04:29,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:29,073 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5461 transitions. [2021-06-05 17:04:29,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:29,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5461 transitions. [2021-06-05 17:04:29,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:29,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:29,075 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:29,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 17:04:29,280 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:29,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1001444339, now seen corresponding path program 54 times [2021-06-05 17:04:29,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:29,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235133715] [2021-06-05 17:04:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:29,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:29,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235133715] [2021-06-05 17:04:29,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235133715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:29,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821785962] [2021-06-05 17:04:29,513 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:04:29,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:04:29,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:29,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:29,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:29,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:29,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:29,645 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 21 treesize of output 37 [2021-06-05 17:04:29,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:29,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:29,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:29,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:15 [2021-06-05 17:04:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821785962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:29,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:29,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:04:29,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249081507] [2021-06-05 17:04:29,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:29,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:29,692 INFO L87 Difference]: Start difference. First operand 1599 states and 5461 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 17:04:31,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:31,792 INFO L93 Difference]: Finished difference Result 2882 states and 9198 transitions. [2021-06-05 17:04:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:04:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 26 [2021-06-05 17:04:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:31,796 INFO L225 Difference]: With dead ends: 2882 [2021-06-05 17:04:31,796 INFO L226 Difference]: Without dead ends: 2848 [2021-06-05 17:04:31,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1878.3ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:04:31,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-06-05 17:04:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1599. [2021-06-05 17:04:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.4198998748435545) internal successors, (5465), 1598 states have internal predecessors, (5465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:31,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5465 transitions. [2021-06-05 17:04:31,818 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5465 transitions. Word has length 26 [2021-06-05 17:04:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:31,818 INFO L482 AbstractCegarLoop]: Abstraction has 1599 states and 5465 transitions. [2021-06-05 17:04:31,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 17:04:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5465 transitions. [2021-06-05 17:04:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:31,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:31,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:32,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 17:04:32,021 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:32,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:32,021 INFO L82 PathProgramCache]: Analyzing trace with hash -344448797, now seen corresponding path program 31 times [2021-06-05 17:04:32,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:32,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544421244] [2021-06-05 17:04:32,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:32,156 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 17:04:32,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:32,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544421244] [2021-06-05 17:04:32,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544421244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693695032] [2021-06-05 17:04:32,156 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 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 17:04:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:32,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:04:32,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:32,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:32,303 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 19 treesize of output 11 [2021-06-05 17:04:32,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:32,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:32,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:32,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:04:32,324 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 17:04:32,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693695032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:32,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:32,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:04:32,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330143554] [2021-06-05 17:04:32,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:32,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:32,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:32,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:32,325 INFO L87 Difference]: Start difference. First operand 1599 states and 5465 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:33,313 INFO L93 Difference]: Finished difference Result 2462 states and 8155 transitions. [2021-06-05 17:04:33,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:04:33,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:04:33,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:33,317 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 17:04:33,317 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 17:04:33,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 812.0ms TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:04:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 17:04:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1590. [2021-06-05 17:04:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.416614222781624) internal successors, (5429), 1589 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5429 transitions. [2021-06-05 17:04:33,337 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5429 transitions. Word has length 26 [2021-06-05 17:04:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:33,337 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5429 transitions. [2021-06-05 17:04:33,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5429 transitions. [2021-06-05 17:04:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:33,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:33,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:33,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:33,541 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash -107626611, now seen corresponding path program 32 times [2021-06-05 17:04:33,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:33,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761324687] [2021-06-05 17:04:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:33,674 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 17:04:33,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761324687] [2021-06-05 17:04:33,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761324687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:33,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050834334] [2021-06-05 17:04:33,674 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 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 17:04:33,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:33,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:33,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:33,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:33,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:33,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:33,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:33,808 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 29 treesize of output 25 [2021-06-05 17:04:33,809 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:33,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:33,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:33,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 17:04:33,847 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 17:04:33,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050834334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:33,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:33,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:04:33,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423162329] [2021-06-05 17:04:33,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:33,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:33,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:33,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:33,848 INFO L87 Difference]: Start difference. First operand 1590 states and 5429 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:04:34,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:34,819 INFO L93 Difference]: Finished difference Result 2279 states and 7572 transitions. [2021-06-05 17:04:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:04:34,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:04:34,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:34,822 INFO L225 Difference]: With dead ends: 2279 [2021-06-05 17:04:34,822 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 17:04:34,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 808.6ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 17:04:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1583. [2021-06-05 17:04:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4140328697850824) internal successors, (5401), 1582 states have internal predecessors, (5401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5401 transitions. [2021-06-05 17:04:34,843 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5401 transitions. Word has length 26 [2021-06-05 17:04:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:34,843 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5401 transitions. [2021-06-05 17:04:34,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:04:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5401 transitions. [2021-06-05 17:04:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:34,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:34,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:35,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:35,046 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash -714132561, now seen corresponding path program 33 times [2021-06-05 17:04:35,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:35,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53439529] [2021-06-05 17:04:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:35,199 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 17:04:35,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:35,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53439529] [2021-06-05 17:04:35,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53439529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780685999] [2021-06-05 17:04:35,199 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 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 17:04:35,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:35,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:35,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:35,355 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 19 treesize of output 11 [2021-06-05 17:04:35,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:35,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:35,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:35,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:3 [2021-06-05 17:04:35,373 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 17:04:35,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780685999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:35,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:35,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 17:04:35,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594500325] [2021-06-05 17:04:35,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:35,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:35,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:35,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:35,374 INFO L87 Difference]: Start difference. First operand 1583 states and 5401 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:35,730 INFO L93 Difference]: Finished difference Result 2090 states and 6923 transitions. [2021-06-05 17:04:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:04:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:04:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:35,733 INFO L225 Difference]: With dead ends: 2090 [2021-06-05 17:04:35,733 INFO L226 Difference]: Without dead ends: 2069 [2021-06-05 17:04:35,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:04:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2021-06-05 17:04:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1559. [2021-06-05 17:04:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 3.4127086007702183) internal successors, (5317), 1558 states have internal predecessors, (5317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 5317 transitions. [2021-06-05 17:04:35,751 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 5317 transitions. Word has length 26 [2021-06-05 17:04:35,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:35,751 INFO L482 AbstractCegarLoop]: Abstraction has 1559 states and 5317 transitions. [2021-06-05 17:04:35,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 5317 transitions. [2021-06-05 17:04:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:35,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:35,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:35,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:35,953 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash -550251037, now seen corresponding path program 34 times [2021-06-05 17:04:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:35,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203766873] [2021-06-05 17:04:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:36,081 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 17:04:36,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:36,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203766873] [2021-06-05 17:04:36,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203766873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:36,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864097025] [2021-06-05 17:04:36,082 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 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 17:04:36,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:36,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:36,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:36,251 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 19 treesize of output 11 [2021-06-05 17:04:36,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:36,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:36,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:36,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:04:36,270 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 17:04:36,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864097025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:36,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:36,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 17:04:36,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361614431] [2021-06-05 17:04:36,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:36,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:36,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:36,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:36,271 INFO L87 Difference]: Start difference. First operand 1559 states and 5317 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 17:04:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:36,705 INFO L93 Difference]: Finished difference Result 2051 states and 6824 transitions. [2021-06-05 17:04:36,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:04:36,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 26 [2021-06-05 17:04:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:36,708 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 17:04:36,708 INFO L226 Difference]: Without dead ends: 2036 [2021-06-05 17:04:36,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:04:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-06-05 17:04:36,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1558. [2021-06-05 17:04:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 3.41233140655106) internal successors, (5313), 1557 states have internal predecessors, (5313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 5313 transitions. [2021-06-05 17:04:36,726 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 5313 transitions. Word has length 26 [2021-06-05 17:04:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:36,726 INFO L482 AbstractCegarLoop]: Abstraction has 1558 states and 5313 transitions. [2021-06-05 17:04:36,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 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 17:04:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 5313 transitions. [2021-06-05 17:04:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:36,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:36,728 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:36,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:36,928 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash 2127183479, now seen corresponding path program 35 times [2021-06-05 17:04:36,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:36,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703690927] [2021-06-05 17:04:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:37,057 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 17:04:37,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703690927] [2021-06-05 17:04:37,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703690927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052821086] [2021-06-05 17:04:37,058 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 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 17:04:37,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:37,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:37,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:37,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:37,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:37,207 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 19 treesize of output 19 [2021-06-05 17:04:37,208 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:37,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:37,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:37,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:19 [2021-06-05 17:04:37,259 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 17:04:37,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052821086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:37,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:37,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:04:37,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126696377] [2021-06-05 17:04:37,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:37,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:37,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:37,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:37,259 INFO L87 Difference]: Start difference. First operand 1558 states and 5313 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 17:04:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:37,875 INFO L93 Difference]: Finished difference Result 2353 states and 7772 transitions. [2021-06-05 17:04:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:04:37,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 26 [2021-06-05 17:04:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:37,878 INFO L225 Difference]: With dead ends: 2353 [2021-06-05 17:04:37,878 INFO L226 Difference]: Without dead ends: 2334 [2021-06-05 17:04:37,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 569.5ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:04:37,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2021-06-05 17:04:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 1541. [2021-06-05 17:04:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1541 states, 1540 states have (on average 3.4103896103896103) internal successors, (5252), 1540 states have internal predecessors, (5252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 5252 transitions. [2021-06-05 17:04:37,899 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 5252 transitions. Word has length 26 [2021-06-05 17:04:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:37,899 INFO L482 AbstractCegarLoop]: Abstraction has 1541 states and 5252 transitions. [2021-06-05 17:04:37,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 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 17:04:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 5252 transitions. [2021-06-05 17:04:37,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:37,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:37,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:38,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:38,102 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1072305685, now seen corresponding path program 36 times [2021-06-05 17:04:38,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:38,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046257175] [2021-06-05 17:04:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:38,226 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 17:04:38,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:38,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046257175] [2021-06-05 17:04:38,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046257175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:38,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002799201] [2021-06-05 17:04:38,227 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 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 17:04:38,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:38,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:38,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:38,371 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 19 treesize of output 27 [2021-06-05 17:04:38,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:38,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:38,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:38,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:77 [2021-06-05 17:04:38,448 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 17:04:38,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002799201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:38,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:38,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:04:38,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769433590] [2021-06-05 17:04:38,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:38,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:38,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:38,448 INFO L87 Difference]: Start difference. First operand 1541 states and 5252 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:04:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:38,845 INFO L93 Difference]: Finished difference Result 2055 states and 6840 transitions. [2021-06-05 17:04:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:04:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:04:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:38,848 INFO L225 Difference]: With dead ends: 2055 [2021-06-05 17:04:38,848 INFO L226 Difference]: Without dead ends: 2040 [2021-06-05 17:04:38,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-06-05 17:04:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1586. [2021-06-05 17:04:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.404416403785489) internal successors, (5396), 1585 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5396 transitions. [2021-06-05 17:04:38,866 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5396 transitions. Word has length 26 [2021-06-05 17:04:38,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:38,866 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5396 transitions. [2021-06-05 17:04:38,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:04:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5396 transitions. [2021-06-05 17:04:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:38,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:38,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:39,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 17:04:39,083 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:39,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1240114777, now seen corresponding path program 37 times [2021-06-05 17:04:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:39,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536600969] [2021-06-05 17:04:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:39,214 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 17:04:39,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:39,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536600969] [2021-06-05 17:04:39,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536600969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:39,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171382214] [2021-06-05 17:04:39,215 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 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 17:04:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:39,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:04:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:39,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:39,369 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 19 treesize of output 11 [2021-06-05 17:04:39,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:39,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:39,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:39,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:04:39,389 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 17:04:39,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171382214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:39,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:39,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:04:39,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285200049] [2021-06-05 17:04:39,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:39,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:39,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:39,390 INFO L87 Difference]: Start difference. First operand 1586 states and 5396 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:39,959 INFO L93 Difference]: Finished difference Result 2330 states and 7681 transitions. [2021-06-05 17:04:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:04:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:04:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:39,962 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 17:04:39,962 INFO L226 Difference]: Without dead ends: 2315 [2021-06-05 17:04:39,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:04:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-06-05 17:04:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1587. [2021-06-05 17:04:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 3.4060529634300125) internal successors, (5402), 1586 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 5402 transitions. [2021-06-05 17:04:39,982 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 5402 transitions. Word has length 26 [2021-06-05 17:04:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:39,982 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 5402 transitions. [2021-06-05 17:04:39,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:39,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 5402 transitions. [2021-06-05 17:04:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:39,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:39,984 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:40,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 17:04:40,184 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:40,185 INFO L82 PathProgramCache]: Analyzing trace with hash -941341329, now seen corresponding path program 38 times [2021-06-05 17:04:40,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:40,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253707862] [2021-06-05 17:04:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:40,315 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 17:04:40,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:40,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253707862] [2021-06-05 17:04:40,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253707862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:40,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249210354] [2021-06-05 17:04:40,315 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 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 17:04:40,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:40,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:40,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:40,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:40,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:40,438 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 28 treesize of output 32 [2021-06-05 17:04:40,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:40,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:40,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:40,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-06-05 17:04:40,532 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 17:04:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249210354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:40,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:40,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 17:04:40,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608549859] [2021-06-05 17:04:40,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:04:40,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:40,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:04:40,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:04:40,533 INFO L87 Difference]: Start difference. First operand 1587 states and 5402 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 17:04:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:40,906 INFO L93 Difference]: Finished difference Result 2103 states and 7017 transitions. [2021-06-05 17:04:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:04:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 26 [2021-06-05 17:04:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:40,908 INFO L225 Difference]: With dead ends: 2103 [2021-06-05 17:04:40,908 INFO L226 Difference]: Without dead ends: 2088 [2021-06-05 17:04:40,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-06-05 17:04:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1590. [2021-06-05 17:04:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.409691629955947) internal successors, (5418), 1589 states have internal predecessors, (5418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5418 transitions. [2021-06-05 17:04:40,927 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5418 transitions. Word has length 26 [2021-06-05 17:04:40,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:40,927 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 5418 transitions. [2021-06-05 17:04:40,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 17:04:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5418 transitions. [2021-06-05 17:04:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:40,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:40,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:41,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 17:04:41,129 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:41,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:41,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1403214703, now seen corresponding path program 39 times [2021-06-05 17:04:41,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:41,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677809833] [2021-06-05 17:04:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:41,237 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 17:04:41,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:41,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677809833] [2021-06-05 17:04:41,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677809833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:41,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261338251] [2021-06-05 17:04:41,237 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 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 17:04:41,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:41,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:41,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:41,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:41,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 17:04:41,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:41,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:41,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:41,397 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:68 [2021-06-05 17:04:41,464 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 17:04:41,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261338251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:41,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:41,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 17:04:41,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589762380] [2021-06-05 17:04:41,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:04:41,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:41,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:04:41,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:04:41,465 INFO L87 Difference]: Start difference. First operand 1590 states and 5418 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 17:04:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:41,776 INFO L93 Difference]: Finished difference Result 2135 states and 7120 transitions. [2021-06-05 17:04:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:04:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 26 [2021-06-05 17:04:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:41,778 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 17:04:41,778 INFO L226 Difference]: Without dead ends: 2120 [2021-06-05 17:04:41,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:04:41,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-06-05 17:04:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1608. [2021-06-05 17:04:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.4051026757934038) internal successors, (5472), 1607 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5472 transitions. [2021-06-05 17:04:41,797 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5472 transitions. Word has length 26 [2021-06-05 17:04:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:41,797 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5472 transitions. [2021-06-05 17:04:41,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 17:04:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5472 transitions. [2021-06-05 17:04:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:41,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:41,799 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:41,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:41,999 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:42,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2092411309, now seen corresponding path program 40 times [2021-06-05 17:04:42,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:42,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867967774] [2021-06-05 17:04:42,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:42,121 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 17:04:42,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:42,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867967774] [2021-06-05 17:04:42,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867967774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:42,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106033112] [2021-06-05 17:04:42,121 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 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 17:04:42,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:42,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:42,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:42,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:42,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:42,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:42,276 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 19 treesize of output 11 [2021-06-05 17:04:42,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:42,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:42,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:42,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-06-05 17:04:42,296 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 17:04:42,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106033112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:42,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:42,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 17:04:42,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002953111] [2021-06-05 17:04:42,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:42,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:42,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:42,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:42,296 INFO L87 Difference]: Start difference. First operand 1608 states and 5472 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 17:04:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:42,698 INFO L93 Difference]: Finished difference Result 2064 states and 6890 transitions. [2021-06-05 17:04:42,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:04:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 26 [2021-06-05 17:04:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:42,701 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 17:04:42,701 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 17:04:42,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:04:42,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 17:04:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1629. [2021-06-05 17:04:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.401105651105651) internal successors, (5537), 1628 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5537 transitions. [2021-06-05 17:04:42,719 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5537 transitions. Word has length 26 [2021-06-05 17:04:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:42,719 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5537 transitions. [2021-06-05 17:04:42,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 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 17:04:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5537 transitions. [2021-06-05 17:04:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:42,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:42,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:42,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:42,922 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:42,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:42,922 INFO L82 PathProgramCache]: Analyzing trace with hash 585023207, now seen corresponding path program 41 times [2021-06-05 17:04:42,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:42,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759925296] [2021-06-05 17:04:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:43,054 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 17:04:43,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:43,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759925296] [2021-06-05 17:04:43,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759925296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866712403] [2021-06-05 17:04:43,054 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:43,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:43,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:43,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:43,192 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:43,192 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 19 treesize of output 19 [2021-06-05 17:04:43,193 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:43,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:43,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:43,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:04:43,234 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 17:04:43,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866712403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:43,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:43,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:04:43,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525041218] [2021-06-05 17:04:43,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:43,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:43,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:43,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:43,234 INFO L87 Difference]: Start difference. First operand 1629 states and 5537 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:04:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:43,736 INFO L93 Difference]: Finished difference Result 2357 states and 7803 transitions. [2021-06-05 17:04:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 17:04:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-05 17:04:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:43,740 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 17:04:43,740 INFO L226 Difference]: Without dead ends: 2342 [2021-06-05 17:04:43,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:04:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-06-05 17:04:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1626. [2021-06-05 17:04:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.4024615384615386) internal successors, (5529), 1625 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5529 transitions. [2021-06-05 17:04:43,760 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5529 transitions. Word has length 26 [2021-06-05 17:04:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:43,760 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5529 transitions. [2021-06-05 17:04:43,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:04:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5529 transitions. [2021-06-05 17:04:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:43,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:43,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:43,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:43,977 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:43,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:43,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1104919697, now seen corresponding path program 42 times [2021-06-05 17:04:43,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:43,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459382282] [2021-06-05 17:04:43,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:44,105 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 17:04:44,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:44,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459382282] [2021-06-05 17:04:44,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459382282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:44,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157679743] [2021-06-05 17:04:44,105 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:44,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:44,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 17:04:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:44,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:44,241 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 19 treesize of output 19 [2021-06-05 17:04:44,242 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:44,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:44,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:44,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 17:04:44,283 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 17:04:44,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157679743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:44,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:44,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:04:44,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349947193] [2021-06-05 17:04:44,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:44,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:44,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:44,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:44,284 INFO L87 Difference]: Start difference. First operand 1626 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:44,762 INFO L93 Difference]: Finished difference Result 2213 states and 7343 transitions. [2021-06-05 17:04:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 17:04:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:04:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:44,765 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 17:04:44,765 INFO L226 Difference]: Without dead ends: 2188 [2021-06-05 17:04:44,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:04:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-05 17:04:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1626. [2021-06-05 17:04:44,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-06-05 17:04:44,785 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-06-05 17:04:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:44,785 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-06-05 17:04:44,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-06-05 17:04:44,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:44,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:44,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:45,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:45,003 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:45,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:45,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1379621035, now seen corresponding path program 43 times [2021-06-05 17:04:45,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:45,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368165885] [2021-06-05 17:04:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:45,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:45,139 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 17:04:45,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368165885] [2021-06-05 17:04:45,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368165885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238476756] [2021-06-05 17:04:45,139 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:45,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:45,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:45,285 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 19 treesize of output 19 [2021-06-05 17:04:45,286 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:45,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:45,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:45,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:04:45,328 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 17:04:45,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238476756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:45,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:45,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 17:04:45,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904333845] [2021-06-05 17:04:45,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:45,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:45,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:45,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:45,328 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 17:04:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:45,663 INFO L93 Difference]: Finished difference Result 2137 states and 7136 transitions. [2021-06-05 17:04:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:04:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 26 [2021-06-05 17:04:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:45,666 INFO L225 Difference]: With dead ends: 2137 [2021-06-05 17:04:45,666 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 17:04:45,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 320.6ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:04:45,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 17:04:45,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1626. [2021-06-05 17:04:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.404923076923077) internal successors, (5533), 1625 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5533 transitions. [2021-06-05 17:04:45,685 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5533 transitions. Word has length 26 [2021-06-05 17:04:45,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:45,685 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5533 transitions. [2021-06-05 17:04:45,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 17:04:45,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5533 transitions. [2021-06-05 17:04:45,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:45,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:45,687 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:45,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:45,887 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:45,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1743994595, now seen corresponding path program 55 times [2021-06-05 17:04:45,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:45,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781802313] [2021-06-05 17:04:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:46,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:46,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781802313] [2021-06-05 17:04:46,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781802313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660968421] [2021-06-05 17:04:46,040 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:46,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:46,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:46,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:46,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:46,164 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 21 treesize of output 11 [2021-06-05 17:04:46,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:46,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:46,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:46,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:04:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:46,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660968421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:46,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 17:04:46,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708162746] [2021-06-05 17:04:46,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:46,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:46,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:46,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:46,186 INFO L87 Difference]: Start difference. First operand 1626 states and 5533 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 17:04:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:46,475 INFO L93 Difference]: Finished difference Result 2071 states and 6841 transitions. [2021-06-05 17:04:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:04:46,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 26 [2021-06-05 17:04:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:46,478 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 17:04:46,478 INFO L226 Difference]: Without dead ends: 2045 [2021-06-05 17:04:46,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:04:46,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-06-05 17:04:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1620. [2021-06-05 17:04:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 3.4033353922174183) internal successors, (5510), 1619 states have internal predecessors, (5510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 5510 transitions. [2021-06-05 17:04:46,496 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 5510 transitions. Word has length 26 [2021-06-05 17:04:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:46,496 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 5510 transitions. [2021-06-05 17:04:46,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 17:04:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 5510 transitions. [2021-06-05 17:04:46,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:46,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:46,498 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:46,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:46,699 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash 469684583, now seen corresponding path program 56 times [2021-06-05 17:04:46,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:46,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579632373] [2021-06-05 17:04:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:46,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:46,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579632373] [2021-06-05 17:04:46,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579632373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082178616] [2021-06-05 17:04:46,847 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:46,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:46,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:46,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:46,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:46,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:46,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:46,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:46,958 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 21 treesize of output 11 [2021-06-05 17:04:46,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:46,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:46,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:46,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:04:46,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:46,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082178616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:46,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:46,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 17:04:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723312688] [2021-06-05 17:04:46,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:46,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:46,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:46,980 INFO L87 Difference]: Start difference. First operand 1620 states and 5510 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 17:04:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:47,486 INFO L93 Difference]: Finished difference Result 2277 states and 7481 transitions. [2021-06-05 17:04:47,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:04:47,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 26 [2021-06-05 17:04:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:47,489 INFO L225 Difference]: With dead ends: 2277 [2021-06-05 17:04:47,489 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 17:04:47,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:04:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 17:04:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1610. [2021-06-05 17:04:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.403977625854568) internal successors, (5477), 1609 states have internal predecessors, (5477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5477 transitions. [2021-06-05 17:04:47,508 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5477 transitions. Word has length 26 [2021-06-05 17:04:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:47,508 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5477 transitions. [2021-06-05 17:04:47,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 17:04:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5477 transitions. [2021-06-05 17:04:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:47,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:47,510 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:47,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 17:04:47,717 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:47,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1044929515, now seen corresponding path program 57 times [2021-06-05 17:04:47,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:47,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323328528] [2021-06-05 17:04:47,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:47,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:47,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323328528] [2021-06-05 17:04:47,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323328528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:47,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442085258] [2021-06-05 17:04:47,858 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:47,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:47,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:48,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:48,041 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-05 17:04:48,041 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 72 treesize of output 50 [2021-06-05 17:04:48,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:48,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:48,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:48,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:3 [2021-06-05 17:04:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:48,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442085258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:48,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:48,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:04:48,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179661721] [2021-06-05 17:04:48,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:04:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:04:48,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:04:48,062 INFO L87 Difference]: Start difference. First operand 1610 states and 5477 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 17:04:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:48,861 INFO L93 Difference]: Finished difference Result 2271 states and 7307 transitions. [2021-06-05 17:04:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:04:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 26 [2021-06-05 17:04:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:48,864 INFO L225 Difference]: With dead ends: 2271 [2021-06-05 17:04:48,864 INFO L226 Difference]: Without dead ends: 2241 [2021-06-05 17:04:48,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:04:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2021-06-05 17:04:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1631. [2021-06-05 17:04:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:48,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-06-05 17:04:48,884 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-06-05 17:04:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:48,884 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-06-05 17:04:48,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 17:04:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-06-05 17:04:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:48,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:48,886 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:49,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 17:04:49,086 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:49,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1778959663, now seen corresponding path program 58 times [2021-06-05 17:04:49,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:49,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347830349] [2021-06-05 17:04:49,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:49,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:49,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347830349] [2021-06-05 17:04:49,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347830349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:49,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506106069] [2021-06-05 17:04:49,206 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:49,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:49,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:49,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 17:04:49,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:49,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:49,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:49,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 17:04:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:49,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506106069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:49,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:49,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 17:04:49,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597241691] [2021-06-05 17:04:49,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:49,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:49,325 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 17:04:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:49,688 INFO L93 Difference]: Finished difference Result 2135 states and 7023 transitions. [2021-06-05 17:04:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:04:49,689 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 26 [2021-06-05 17:04:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:49,692 INFO L225 Difference]: With dead ends: 2135 [2021-06-05 17:04:49,692 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 17:04:49,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:04:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 17:04:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1631. [2021-06-05 17:04:49,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.399386503067485) internal successors, (5541), 1630 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5541 transitions. [2021-06-05 17:04:49,711 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5541 transitions. Word has length 26 [2021-06-05 17:04:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:49,711 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 5541 transitions. [2021-06-05 17:04:49,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 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 17:04:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5541 transitions. [2021-06-05 17:04:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:49,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:49,713 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:49,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 17:04:49,914 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:49,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2112804079, now seen corresponding path program 59 times [2021-06-05 17:04:49,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:49,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012863295] [2021-06-05 17:04:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:50,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:50,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012863295] [2021-06-05 17:04:50,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012863295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:50,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868179570] [2021-06-05 17:04:50,057 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:50,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:04:50,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:50,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:50,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:50,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 17:04:50,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:50,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:50,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:50,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 17:04:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:50,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868179570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:50,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:50,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:04:50,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055213990] [2021-06-05 17:04:50,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:50,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:50,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:50,186 INFO L87 Difference]: Start difference. First operand 1631 states and 5541 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 17:04:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:50,561 INFO L93 Difference]: Finished difference Result 2023 states and 6745 transitions. [2021-06-05 17:04:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:04:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 26 [2021-06-05 17:04:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:50,564 INFO L225 Difference]: With dead ends: 2023 [2021-06-05 17:04:50,564 INFO L226 Difference]: Without dead ends: 1992 [2021-06-05 17:04:50,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:04:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-06-05 17:04:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1637. [2021-06-05 17:04:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-06-05 17:04:50,582 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-06-05 17:04:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:50,582 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-06-05 17:04:50,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 17:04:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-06-05 17:04:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:50,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:50,584 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:50,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:50,784 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash 455537647, now seen corresponding path program 60 times [2021-06-05 17:04:50,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:50,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56637102] [2021-06-05 17:04:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:50,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:50,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56637102] [2021-06-05 17:04:50,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56637102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:50,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953608576] [2021-06-05 17:04:50,912 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:50,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:04:50,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:50,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:50,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:51,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-06-05 17:04:51,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:51,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-06-05 17:04:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:51,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953608576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:51,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 17:04:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820464339] [2021-06-05 17:04:51,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:04:51,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:51,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:04:51,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:04:51,030 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 17:04:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:51,348 INFO L93 Difference]: Finished difference Result 2057 states and 6834 transitions. [2021-06-05 17:04:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:04:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 26 [2021-06-05 17:04:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:51,351 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 17:04:51,351 INFO L226 Difference]: Without dead ends: 2042 [2021-06-05 17:04:51,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:04:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-06-05 17:04:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1637. [2021-06-05 17:04:51,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1637 states, 1636 states have (on average 3.3973105134474326) internal successors, (5558), 1636 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1637 states to 1637 states and 5558 transitions. [2021-06-05 17:04:51,369 INFO L78 Accepts]: Start accepts. Automaton has 1637 states and 5558 transitions. Word has length 26 [2021-06-05 17:04:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:51,369 INFO L482 AbstractCegarLoop]: Abstraction has 1637 states and 5558 transitions. [2021-06-05 17:04:51,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 17:04:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1637 states and 5558 transitions. [2021-06-05 17:04:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:51,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:51,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:51,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 17:04:51,572 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:51,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:51,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1197737873, now seen corresponding path program 44 times [2021-06-05 17:04:51,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:51,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233175836] [2021-06-05 17:04:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:51,741 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 17:04:51,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:51,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233175836] [2021-06-05 17:04:51,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233175836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399710407] [2021-06-05 17:04:51,741 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:51,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:51,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:51,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:51,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:51,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:51,878 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 19 treesize of output 19 [2021-06-05 17:04:51,879 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:51,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:51,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:51,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 17:04:51,920 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 17:04:51,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399710407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:51,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:51,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:04:51,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138039655] [2021-06-05 17:04:51,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:51,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:51,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:51,921 INFO L87 Difference]: Start difference. First operand 1637 states and 5558 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:53,062 INFO L93 Difference]: Finished difference Result 2310 states and 7570 transitions. [2021-06-05 17:04:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:53,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2021-06-05 17:04:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:53,065 INFO L225 Difference]: With dead ends: 2310 [2021-06-05 17:04:53,065 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 17:04:53,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 858.7ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:04:53,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 17:04:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1638. [2021-06-05 17:04:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.392791692119731) internal successors, (5554), 1637 states have internal predecessors, (5554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5554 transitions. [2021-06-05 17:04:53,085 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5554 transitions. Word has length 26 [2021-06-05 17:04:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:53,093 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5554 transitions. [2021-06-05 17:04:53,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5554 transitions. [2021-06-05 17:04:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:53,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:53,095 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:53,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-05 17:04:53,296 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash -659260211, now seen corresponding path program 61 times [2021-06-05 17:04:53,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:53,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490893962] [2021-06-05 17:04:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:53,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:53,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490893962] [2021-06-05 17:04:53,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490893962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:53,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685351695] [2021-06-05 17:04:53,389 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:53,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:53,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:53,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:53,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:53,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:53,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:04:53,534 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 21 treesize of output 11 [2021-06-05 17:04:53,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:04:53,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:53,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:53,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:04:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:53,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685351695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:53,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:53,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:04:53,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528619007] [2021-06-05 17:04:53,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:53,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:53,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:53,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:53,551 INFO L87 Difference]: Start difference. First operand 1638 states and 5554 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:04:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:54,307 INFO L93 Difference]: Finished difference Result 2717 states and 8732 transitions. [2021-06-05 17:04:54,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:04:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 26 [2021-06-05 17:04:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:54,311 INFO L225 Difference]: With dead ends: 2717 [2021-06-05 17:04:54,311 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 17:04:54,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 507.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:04:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 17:04:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1680. [2021-06-05 17:04:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.4032162001191186) internal successors, (5714), 1679 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:54,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5714 transitions. [2021-06-05 17:04:54,333 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5714 transitions. Word has length 26 [2021-06-05 17:04:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:54,333 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5714 transitions. [2021-06-05 17:04:54,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 17:04:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5714 transitions. [2021-06-05 17:04:54,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:54,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:54,335 INFO L521 BasicCegarLoop]: trace histogram [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 17:04:54,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:54,535 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:54,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:54,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1882681429, now seen corresponding path program 62 times [2021-06-05 17:04:54,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:54,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453469927] [2021-06-05 17:04:54,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:54,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:54,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453469927] [2021-06-05 17:04:54,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453469927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:54,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177610049] [2021-06-05 17:04:54,630 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:04:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:54,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:04:54,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:54,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:54,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:54,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:54,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:54,765 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 25 treesize of output 43 [2021-06-05 17:04:54,772 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:04:54,783 INFO L628 ElimStorePlain]: treesize reduction 24, result has 38.5 percent of original size [2021-06-05 17:04:54,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:54,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 17:04:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:04:54,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177610049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:54,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:54,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:04:54,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540113839] [2021-06-05 17:04:54,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:54,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:54,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:54,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:54,821 INFO L87 Difference]: Start difference. First operand 1680 states and 5714 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:56,101 INFO L93 Difference]: Finished difference Result 3323 states and 10531 transitions. [2021-06-05 17:04:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:04:56,102 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 26 [2021-06-05 17:04:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:56,106 INFO L225 Difference]: With dead ends: 3323 [2021-06-05 17:04:56,106 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 17:04:56,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 897.9ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:04:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 17:04:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 1708. [2021-06-05 17:04:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1708 states, 1707 states have (on average 3.4106619800820153) internal successors, (5822), 1707 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1708 states to 1708 states and 5822 transitions. [2021-06-05 17:04:56,131 INFO L78 Accepts]: Start accepts. Automaton has 1708 states and 5822 transitions. Word has length 26 [2021-06-05 17:04:56,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:56,131 INFO L482 AbstractCegarLoop]: Abstraction has 1708 states and 5822 transitions. [2021-06-05 17:04:56,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:56,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1708 states and 5822 transitions. [2021-06-05 17:04:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:56,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:56,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:56,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:56,334 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:56,334 INFO L82 PathProgramCache]: Analyzing trace with hash -32178733, now seen corresponding path program 45 times [2021-06-05 17:04:56,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:56,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84406862] [2021-06-05 17:04:56,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:56,453 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 17:04:56,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:56,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84406862] [2021-06-05 17:04:56,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84406862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:56,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437968033] [2021-06-05 17:04:56,454 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:56,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:04:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:04:56,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:56,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:56,668 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 19 treesize of output 35 [2021-06-05 17:04:56,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:04:56,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:56,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:04:56,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:150 [2021-06-05 17:04:56,837 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 17:04:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437968033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:56,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:56,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:04:56,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281624767] [2021-06-05 17:04:56,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:04:56,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:56,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:04:56,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:04:56,838 INFO L87 Difference]: Start difference. First operand 1708 states and 5822 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:04:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:58,471 INFO L93 Difference]: Finished difference Result 2381 states and 7796 transitions. [2021-06-05 17:04:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:04:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:04:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:58,475 INFO L225 Difference]: With dead ends: 2381 [2021-06-05 17:04:58,475 INFO L226 Difference]: Without dead ends: 2366 [2021-06-05 17:04:58,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1212.8ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:04:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-06-05 17:04:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1721. [2021-06-05 17:04:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.4069767441860463) internal successors, (5860), 1720 states have internal predecessors, (5860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5860 transitions. [2021-06-05 17:04:58,495 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5860 transitions. Word has length 26 [2021-06-05 17:04:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:58,495 INFO L482 AbstractCegarLoop]: Abstraction has 1721 states and 5860 transitions. [2021-06-05 17:04:58,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:04:58,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5860 transitions. [2021-06-05 17:04:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:58,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:58,497 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:58,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 17:04:58,697 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:58,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1649711513, now seen corresponding path program 46 times [2021-06-05 17:04:58,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:58,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985525310] [2021-06-05 17:04:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:58,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:04:58,806 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 17:04:58,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:04:58,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985525310] [2021-06-05 17:04:58,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985525310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:58,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585904479] [2021-06-05 17:04:58,806 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:58,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:04:58,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:04:58,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:04:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:04:58,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:04:58,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:58,941 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 19 treesize of output 19 [2021-06-05 17:04:58,943 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:04:58,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:04:58,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:04:58,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:04:58,983 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 17:04:58,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585904479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:04:58,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:04:58,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:04:58,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852389480] [2021-06-05 17:04:58,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:04:58,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:04:58,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:04:58,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:04:58,984 INFO L87 Difference]: Start difference. First operand 1721 states and 5860 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:04:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:04:59,745 INFO L93 Difference]: Finished difference Result 2557 states and 8457 transitions. [2021-06-05 17:04:59,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:04:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 17:04:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:04:59,749 INFO L225 Difference]: With dead ends: 2557 [2021-06-05 17:04:59,749 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 17:04:59,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:04:59,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 17:04:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1724. [2021-06-05 17:04:59,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.4062681369704007) internal successors, (5869), 1723 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:04:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5869 transitions. [2021-06-05 17:04:59,771 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5869 transitions. Word has length 26 [2021-06-05 17:04:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:04:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5869 transitions. [2021-06-05 17:04:59,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:04:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5869 transitions. [2021-06-05 17:04:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:04:59,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:04:59,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:04:59,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:04:59,973 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:04:59,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:04:59,973 INFO L82 PathProgramCache]: Analyzing trace with hash 955312879, now seen corresponding path program 47 times [2021-06-05 17:04:59,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:04:59,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248630065] [2021-06-05 17:04:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:04:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:00,089 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 17:05:00,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:00,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248630065] [2021-06-05 17:05:00,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248630065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:00,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793672200] [2021-06-05 17:05:00,090 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:00,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 17:05:00,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:00,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:00,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:00,244 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 19 treesize of output 27 [2021-06-05 17:05:00,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:00,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:00,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:05:00,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-06-05 17:05:00,333 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 17:05:00,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793672200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:00,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:00,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:05:00,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536506957] [2021-06-05 17:05:00,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:00,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:00,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:00,334 INFO L87 Difference]: Start difference. First operand 1724 states and 5869 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:05:01,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:01,004 INFO L93 Difference]: Finished difference Result 2476 states and 8179 transitions. [2021-06-05 17:05:01,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:05:01,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 26 [2021-06-05 17:05:01,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:01,008 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 17:05:01,008 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 17:05:01,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:05:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 17:05:01,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1710. [2021-06-05 17:05:01,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1709 states have (on average 3.4119368051492103) internal successors, (5831), 1709 states have internal predecessors, (5831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 5831 transitions. [2021-06-05 17:05:01,046 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 5831 transitions. Word has length 26 [2021-06-05 17:05:01,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:01,046 INFO L482 AbstractCegarLoop]: Abstraction has 1710 states and 5831 transitions. [2021-06-05 17:05:01,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:05:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 5831 transitions. [2021-06-05 17:05:01,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:01,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:01,048 INFO L521 BasicCegarLoop]: trace histogram [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 17:05:01,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-06-05 17:05:01,248 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:01,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash -441885819, now seen corresponding path program 63 times [2021-06-05 17:05:01,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:01,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112309516] [2021-06-05 17:05:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:01,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112309516] [2021-06-05 17:05:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112309516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:01,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304076901] [2021-06-05 17:05:01,365 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:01,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:01,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:05:01,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:01,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:01,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:01,518 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 21 treesize of output 11 [2021-06-05 17:05:01,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:01,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:01,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:01,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:05:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:01,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304076901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:01,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:01,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:05:01,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602096008] [2021-06-05 17:05:01,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:05:01,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:01,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:05:01,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:05:01,536 INFO L87 Difference]: Start difference. First operand 1710 states and 5831 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 17:05:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:02,353 INFO L93 Difference]: Finished difference Result 2583 states and 8404 transitions. [2021-06-05 17:05:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:05:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 26 [2021-06-05 17:05:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:02,357 INFO L225 Difference]: With dead ends: 2583 [2021-06-05 17:05:02,357 INFO L226 Difference]: Without dead ends: 2553 [2021-06-05 17:05:02,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 585.0ms TimeCoverageRelationStatistics Valid=263, Invalid=1219, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:05:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-06-05 17:05:02,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1766. [2021-06-05 17:05:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 3.405665722379603) internal successors, (6011), 1765 states have internal predecessors, (6011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6011 transitions. [2021-06-05 17:05:02,379 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6011 transitions. Word has length 26 [2021-06-05 17:05:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:02,379 INFO L482 AbstractCegarLoop]: Abstraction has 1766 states and 6011 transitions. [2021-06-05 17:05:02,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 17:05:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6011 transitions. [2021-06-05 17:05:02,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:02,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:02,382 INFO L521 BasicCegarLoop]: trace histogram [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 17:05:02,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:02,582 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:02,582 INFO L82 PathProgramCache]: Analyzing trace with hash 402208991, now seen corresponding path program 64 times [2021-06-05 17:05:02,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:02,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989620213] [2021-06-05 17:05:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:02,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989620213] [2021-06-05 17:05:02,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989620213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:02,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242419482] [2021-06-05 17:05:02,692 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:02,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:02,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:02,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:02,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:02,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:02,837 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 21 treesize of output 11 [2021-06-05 17:05:02,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:02,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:02,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:02,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:05:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:02,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242419482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:02,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:02,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:05:02,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172014924] [2021-06-05 17:05:02,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:02,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:02,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:02,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:02,859 INFO L87 Difference]: Start difference. First operand 1766 states and 6011 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 17:05:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:03,777 INFO L93 Difference]: Finished difference Result 2816 states and 9179 transitions. [2021-06-05 17:05:03,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:05:03,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-06-05 17:05:03,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:03,781 INFO L225 Difference]: With dead ends: 2816 [2021-06-05 17:05:03,781 INFO L226 Difference]: Without dead ends: 2794 [2021-06-05 17:05:03,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 766.9ms TimeCoverageRelationStatistics Valid=410, Invalid=1482, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:05:03,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-05 17:05:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1780. [2021-06-05 17:05:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1779 states have (on average 3.3991006183249017) internal successors, (6047), 1779 states have internal predecessors, (6047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 6047 transitions. [2021-06-05 17:05:03,806 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 6047 transitions. Word has length 26 [2021-06-05 17:05:03,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:03,806 INFO L482 AbstractCegarLoop]: Abstraction has 1780 states and 6047 transitions. [2021-06-05 17:05:03,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 17:05:03,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 6047 transitions. [2021-06-05 17:05:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:03,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:03,808 INFO L521 BasicCegarLoop]: trace histogram [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 17:05:04,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 17:05:04,013 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash 483608047, now seen corresponding path program 65 times [2021-06-05 17:05:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:04,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751407658] [2021-06-05 17:05:04,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:04,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:04,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751407658] [2021-06-05 17:05:04,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751407658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:04,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760652324] [2021-06-05 17:05:04,128 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:04,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:04,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:05:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:04,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:04,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:04,284 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 21 treesize of output 11 [2021-06-05 17:05:04,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:04,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:04,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:04,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:05:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:04,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760652324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:04,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:04,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:05:04,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581960514] [2021-06-05 17:05:04,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:04,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:04,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:04,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:04,306 INFO L87 Difference]: Start difference. First operand 1780 states and 6047 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 17:05:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:05,126 INFO L93 Difference]: Finished difference Result 2668 states and 8760 transitions. [2021-06-05 17:05:05,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:05:05,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 26 [2021-06-05 17:05:05,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:05,129 INFO L225 Difference]: With dead ends: 2668 [2021-06-05 17:05:05,129 INFO L226 Difference]: Without dead ends: 2649 [2021-06-05 17:05:05,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:05:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-05 17:05:05,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 1789. [2021-06-05 17:05:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.402684563758389) internal successors, (6084), 1788 states have internal predecessors, (6084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6084 transitions. [2021-06-05 17:05:05,151 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6084 transitions. Word has length 26 [2021-06-05 17:05:05,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:05,151 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6084 transitions. [2021-06-05 17:05:05,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 17:05:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6084 transitions. [2021-06-05 17:05:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:05,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:05,153 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:05,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:05,354 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:05,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:05,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1928409045, now seen corresponding path program 48 times [2021-06-05 17:05:05,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:05,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023981601] [2021-06-05 17:05:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:05,484 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 17:05:05,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023981601] [2021-06-05 17:05:05,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023981601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:05,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457959157] [2021-06-05 17:05:05,484 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:05,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:05,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:05,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:05,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:05,627 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 19 treesize of output 27 [2021-06-05 17:05:05,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:05,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:05,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:05,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:75 [2021-06-05 17:05:05,749 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 17:05:05,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457959157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:05,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:05,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 17:05:05,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771269873] [2021-06-05 17:05:05,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:05,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:05,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:05,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:05,750 INFO L87 Difference]: Start difference. First operand 1789 states and 6084 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:05:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:06,840 INFO L93 Difference]: Finished difference Result 2769 states and 9024 transitions. [2021-06-05 17:05:06,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:05:06,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:05:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:06,844 INFO L225 Difference]: With dead ends: 2769 [2021-06-05 17:05:06,844 INFO L226 Difference]: Without dead ends: 2754 [2021-06-05 17:05:06,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 848.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:05:06,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-06-05 17:05:06,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 1789. [2021-06-05 17:05:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.3982102908277403) internal successors, (6076), 1788 states have internal predecessors, (6076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:06,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6076 transitions. [2021-06-05 17:05:06,867 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6076 transitions. Word has length 26 [2021-06-05 17:05:06,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:06,868 INFO L482 AbstractCegarLoop]: Abstraction has 1789 states and 6076 transitions. [2021-06-05 17:05:06,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:05:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6076 transitions. [2021-06-05 17:05:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:06,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:06,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:07,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:07,070 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:07,070 INFO L82 PathProgramCache]: Analyzing trace with hash 676615347, now seen corresponding path program 49 times [2021-06-05 17:05:07,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:07,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503860058] [2021-06-05 17:05:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:07,198 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 17:05:07,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:07,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503860058] [2021-06-05 17:05:07,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503860058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:07,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207894535] [2021-06-05 17:05:07,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:07,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:07,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:07,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:07,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:07,336 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 19 treesize of output 19 [2021-06-05 17:05:07,337 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:05:07,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:07,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:07,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:05:07,378 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 17:05:07,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207894535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:07,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:07,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:07,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56927776] [2021-06-05 17:05:07,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:07,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:07,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:07,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:07,379 INFO L87 Difference]: Start difference. First operand 1789 states and 6076 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:05:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:07,851 INFO L93 Difference]: Finished difference Result 2442 states and 8101 transitions. [2021-06-05 17:05:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:05:07,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 17:05:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:07,854 INFO L225 Difference]: With dead ends: 2442 [2021-06-05 17:05:07,854 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 17:05:07,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:05:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 17:05:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1783. [2021-06-05 17:05:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.3956228956228958) internal successors, (6051), 1782 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6051 transitions. [2021-06-05 17:05:07,883 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6051 transitions. Word has length 26 [2021-06-05 17:05:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:07,883 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6051 transitions. [2021-06-05 17:05:07,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:05:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6051 transitions. [2021-06-05 17:05:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:07,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:07,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:08,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:08,086 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1815461431, now seen corresponding path program 50 times [2021-06-05 17:05:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:08,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998897219] [2021-06-05 17:05:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:08,215 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 17:05:08,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998897219] [2021-06-05 17:05:08,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998897219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:08,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988174239] [2021-06-05 17:05:08,215 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:08,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:08,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:08,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:05:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:08,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:08,344 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 19 treesize of output 19 [2021-06-05 17:05:08,345 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:05:08,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:08,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:08,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:15 [2021-06-05 17:05:08,380 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 17:05:08,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988174239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:08,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:08,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:05:08,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886894004] [2021-06-05 17:05:08,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:08,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:08,380 INFO L87 Difference]: Start difference. First operand 1783 states and 6051 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:05:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:09,173 INFO L93 Difference]: Finished difference Result 2378 states and 7896 transitions. [2021-06-05 17:05:09,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:05:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 26 [2021-06-05 17:05:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:09,176 INFO L225 Difference]: With dead ends: 2378 [2021-06-05 17:05:09,177 INFO L226 Difference]: Without dead ends: 2363 [2021-06-05 17:05:09,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:05:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-06-05 17:05:09,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1772. [2021-06-05 17:05:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.399209486166008) internal successors, (6020), 1771 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 6020 transitions. [2021-06-05 17:05:09,198 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 6020 transitions. Word has length 26 [2021-06-05 17:05:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:09,198 INFO L482 AbstractCegarLoop]: Abstraction has 1772 states and 6020 transitions. [2021-06-05 17:05:09,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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 17:05:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 6020 transitions. [2021-06-05 17:05:09,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:09,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:09,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:09,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:09,400 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:09,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:09,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1133811217, now seen corresponding path program 51 times [2021-06-05 17:05:09,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:09,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696989901] [2021-06-05 17:05:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:09,544 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 17:05:09,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:09,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696989901] [2021-06-05 17:05:09,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696989901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:09,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753668309] [2021-06-05 17:05:09,544 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:09,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:09,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:05:09,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:09,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:09,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:09,685 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 19 treesize of output 27 [2021-06-05 17:05:09,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:09,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:09,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:05:09,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:71 [2021-06-05 17:05:09,774 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 17:05:09,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753668309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:09,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:09,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 17:05:09,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511343426] [2021-06-05 17:05:09,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:09,775 INFO L87 Difference]: Start difference. First operand 1772 states and 6020 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:05:10,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:10,260 INFO L93 Difference]: Finished difference Result 2374 states and 7919 transitions. [2021-06-05 17:05:10,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:05:10,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 26 [2021-06-05 17:05:10,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:10,263 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 17:05:10,263 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 17:05:10,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 434.4ms TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:05:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 17:05:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1783. [2021-06-05 17:05:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.4079685746352415) internal successors, (6073), 1782 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6073 transitions. [2021-06-05 17:05:10,285 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6073 transitions. Word has length 26 [2021-06-05 17:05:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:10,285 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6073 transitions. [2021-06-05 17:05:10,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 17:05:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6073 transitions. [2021-06-05 17:05:10,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:10,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:10,287 INFO L521 BasicCegarLoop]: trace histogram [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 17:05:10,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:10,487 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:10,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1092882871, now seen corresponding path program 66 times [2021-06-05 17:05:10,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:10,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154413458] [2021-06-05 17:05:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:10,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:10,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:10,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154413458] [2021-06-05 17:05:10,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154413458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:10,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714753317] [2021-06-05 17:05:10,619 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:10,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:10,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:10,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 17:05:10,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:10,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:10,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:10,767 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 21 treesize of output 11 [2021-06-05 17:05:10,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:10,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:10,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:10,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:05:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:10,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714753317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:10,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:10,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 17:05:10,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204643150] [2021-06-05 17:05:10,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:05:10,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:10,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:05:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:05:10,784 INFO L87 Difference]: Start difference. First operand 1783 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 17:05:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:11,779 INFO L93 Difference]: Finished difference Result 2367 states and 7833 transitions. [2021-06-05 17:05:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:05:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 26 [2021-06-05 17:05:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:11,782 INFO L225 Difference]: With dead ends: 2367 [2021-06-05 17:05:11,782 INFO L226 Difference]: Without dead ends: 2345 [2021-06-05 17:05:11,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:05:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2021-06-05 17:05:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1774. [2021-06-05 17:05:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.412859560067682) internal successors, (6051), 1773 states have internal predecessors, (6051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 6051 transitions. [2021-06-05 17:05:11,803 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 6051 transitions. Word has length 26 [2021-06-05 17:05:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:11,804 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 6051 transitions. [2021-06-05 17:05:11,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 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 17:05:11,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 6051 transitions. [2021-06-05 17:05:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:11,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:11,806 INFO L521 BasicCegarLoop]: trace histogram [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 17:05:12,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:12,006 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash -167389005, now seen corresponding path program 67 times [2021-06-05 17:05:12,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:12,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958146770] [2021-06-05 17:05:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:12,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:12,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958146770] [2021-06-05 17:05:12,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958146770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:12,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762784416] [2021-06-05 17:05:12,139 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:05:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:12,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:12,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:05:12,265 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 21 treesize of output 11 [2021-06-05 17:05:12,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:05:12,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:12,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:12,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-06-05 17:05:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:12,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762784416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:12,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:12,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 17:05:12,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112179572] [2021-06-05 17:05:12,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:12,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:12,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:12,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:12,292 INFO L87 Difference]: Start difference. First operand 1774 states and 6051 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 17:05:13,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:13,054 INFO L93 Difference]: Finished difference Result 2445 states and 8079 transitions. [2021-06-05 17:05:13,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:05:13,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 26 [2021-06-05 17:05:13,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:13,058 INFO L225 Difference]: With dead ends: 2445 [2021-06-05 17:05:13,058 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 17:05:13,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 656.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:05:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 17:05:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1768. [2021-06-05 17:05:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.411431805319751) internal successors, (6028), 1767 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 6028 transitions. [2021-06-05 17:05:13,078 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 6028 transitions. Word has length 26 [2021-06-05 17:05:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:13,078 INFO L482 AbstractCegarLoop]: Abstraction has 1768 states and 6028 transitions. [2021-06-05 17:05:13,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 17:05:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 6028 transitions. [2021-06-05 17:05:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:13,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:13,080 INFO L521 BasicCegarLoop]: trace histogram [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 17:05:13,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable361 [2021-06-05 17:05:13,296 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:13,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:13,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1466803217, now seen corresponding path program 68 times [2021-06-05 17:05:13,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:13,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748218864] [2021-06-05 17:05:13,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:13,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:13,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748218864] [2021-06-05 17:05:13,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748218864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:13,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897029978] [2021-06-05 17:05:13,415 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:13,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:13,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:13,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:05:13,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:13,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:13,575 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 21 treesize of output 39 [2021-06-05 17:05:13,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:05:13,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:13,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:13,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:05:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:13,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897029978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:13,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:13,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 17:05:13,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785165284] [2021-06-05 17:05:13,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:05:13,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:05:13,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:13,621 INFO L87 Difference]: Start difference. First operand 1768 states and 6028 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 17:05:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:14,585 INFO L93 Difference]: Finished difference Result 2420 states and 8056 transitions. [2021-06-05 17:05:14,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:05:14,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 26 [2021-06-05 17:05:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:14,588 INFO L225 Difference]: With dead ends: 2420 [2021-06-05 17:05:14,588 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 17:05:14,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:05:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 17:05:14,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1770. [2021-06-05 17:05:14,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.4132278123233464) internal successors, (6038), 1769 states have internal predecessors, (6038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 6038 transitions. [2021-06-05 17:05:14,609 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 6038 transitions. Word has length 26 [2021-06-05 17:05:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:14,609 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 6038 transitions. [2021-06-05 17:05:14,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 17:05:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 6038 transitions. [2021-06-05 17:05:14,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:05:14,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:14,611 INFO L521 BasicCegarLoop]: trace histogram [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 17:05:14,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:14,812 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:14,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:14,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1755833907, now seen corresponding path program 69 times [2021-06-05 17:05:14,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:14,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616233173] [2021-06-05 17:05:14,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:14,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:14,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:14,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616233173] [2021-06-05 17:05:14,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616233173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:14,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677078605] [2021-06-05 17:05:14,917 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:14,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:14,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 17:05:14,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:15,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:05:15,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:05:15,029 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 21 treesize of output 39 [2021-06-05 17:05:15,033 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:05:15,046 INFO L628 ElimStorePlain]: treesize reduction 15, result has 54.5 percent of original size [2021-06-05 17:05:15,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:05:15,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 17:05:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:15,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677078605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:15,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:15,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:05:15,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221969453] [2021-06-05 17:05:15,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:05:15,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:05:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:05:15,084 INFO L87 Difference]: Start difference. First operand 1770 states and 6038 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:15,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:15,686 INFO L93 Difference]: Finished difference Result 2553 states and 8437 transitions. [2021-06-05 17:05:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:05:15,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 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 26 [2021-06-05 17:05:15,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:15,690 INFO L225 Difference]: With dead ends: 2553 [2021-06-05 17:05:15,690 INFO L226 Difference]: Without dead ends: 2523 [2021-06-05 17:05:15,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 440.3ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:05:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2523 states. [2021-06-05 17:05:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2523 to 1776. [2021-06-05 17:05:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 3.411830985915493) internal successors, (6056), 1775 states have internal predecessors, (6056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 6056 transitions. [2021-06-05 17:05:15,710 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 6056 transitions. Word has length 26 [2021-06-05 17:05:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:15,710 INFO L482 AbstractCegarLoop]: Abstraction has 1776 states and 6056 transitions. [2021-06-05 17:05:15,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 6056 transitions. [2021-06-05 17:05:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:15,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:15,713 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:15,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:15,913 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:15,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1407294025, now seen corresponding path program 52 times [2021-06-05 17:05:15,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:15,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925416164] [2021-06-05 17:05:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:15,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925416164] [2021-06-05 17:05:15,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925416164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:15,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131089327] [2021-06-05 17:05:15,950 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:16,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:16,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:16,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:16,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:16,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131089327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:16,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:16,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:05:16,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462004775] [2021-06-05 17:05:16,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:05:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:16,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:05:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:05:16,100 INFO L87 Difference]: Start difference. First operand 1776 states and 6056 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 17:05:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:16,918 INFO L93 Difference]: Finished difference Result 4749 states and 14648 transitions. [2021-06-05 17:05:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:05:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-06-05 17:05:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:16,924 INFO L225 Difference]: With dead ends: 4749 [2021-06-05 17:05:16,924 INFO L226 Difference]: Without dead ends: 4749 [2021-06-05 17:05:16,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:05:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4749 states. [2021-06-05 17:05:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4749 to 1969. [2021-06-05 17:05:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.4690040650406506) internal successors, (6827), 1968 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:16,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6827 transitions. [2021-06-05 17:05:16,957 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6827 transitions. Word has length 28 [2021-06-05 17:05:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:16,957 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 6827 transitions. [2021-06-05 17:05:16,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 17:05:16,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6827 transitions. [2021-06-05 17:05:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:16,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:16,960 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:17,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:17,160 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:17,160 INFO L82 PathProgramCache]: Analyzing trace with hash 430975181, now seen corresponding path program 53 times [2021-06-05 17:05:17,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:17,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166775249] [2021-06-05 17:05:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:17,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:17,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166775249] [2021-06-05 17:05:17,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166775249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:17,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964939489] [2021-06-05 17:05:17,197 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:17,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:17,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:17,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964939489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:17,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:17,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:05:17,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989402956] [2021-06-05 17:05:17,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:17,324 INFO L87 Difference]: Start difference. First operand 1969 states and 6827 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 17:05:18,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:18,422 INFO L93 Difference]: Finished difference Result 6328 states and 19229 transitions. [2021-06-05 17:05:18,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:05:18,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-06-05 17:05:18,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:18,430 INFO L225 Difference]: With dead ends: 6328 [2021-06-05 17:05:18,430 INFO L226 Difference]: Without dead ends: 6328 [2021-06-05 17:05:18,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 670.9ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:05:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6328 states. [2021-06-05 17:05:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6328 to 1980. [2021-06-05 17:05:18,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.477008590197069) internal successors, (6881), 1979 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6881 transitions. [2021-06-05 17:05:18,475 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6881 transitions. Word has length 28 [2021-06-05 17:05:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:18,475 INFO L482 AbstractCegarLoop]: Abstraction has 1980 states and 6881 transitions. [2021-06-05 17:05:18,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 17:05:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6881 transitions. [2021-06-05 17:05:18,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:18,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:18,477 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:18,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:18,678 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:18,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:18,678 INFO L82 PathProgramCache]: Analyzing trace with hash 997927261, now seen corresponding path program 54 times [2021-06-05 17:05:18,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:18,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444298791] [2021-06-05 17:05:18,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:18,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444298791] [2021-06-05 17:05:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444298791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024435554] [2021-06-05 17:05:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:18,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:18,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:18,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024435554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:18,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:18,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:05:18,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893589576] [2021-06-05 17:05:18,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:18,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:18,842 INFO L87 Difference]: Start difference. First operand 1980 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 17:05:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:19,937 INFO L93 Difference]: Finished difference Result 5721 states and 17761 transitions. [2021-06-05 17:05:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:05:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 28 [2021-06-05 17:05:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:19,944 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 17:05:19,945 INFO L226 Difference]: Without dead ends: 5721 [2021-06-05 17:05:19,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:05:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-05 17:05:19,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 1928. [2021-06-05 17:05:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.4504411001556825) internal successors, (6649), 1927 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6649 transitions. [2021-06-05 17:05:19,993 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6649 transitions. Word has length 28 [2021-06-05 17:05:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:19,993 INFO L482 AbstractCegarLoop]: Abstraction has 1928 states and 6649 transitions. [2021-06-05 17:05:19,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 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 17:05:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6649 transitions. [2021-06-05 17:05:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:19,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:19,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 17:05:20,196 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:20,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:20,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2115011713, now seen corresponding path program 55 times [2021-06-05 17:05:20,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:20,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913495691] [2021-06-05 17:05:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:20,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913495691] [2021-06-05 17:05:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913495691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:20,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774127086] [2021-06-05 17:05:20,233 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:20,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:20,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:20,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774127086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:20,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:20,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:05:20,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44225089] [2021-06-05 17:05:20,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:05:20,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:20,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:05:20,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:05:20,342 INFO L87 Difference]: Start difference. First operand 1928 states and 6649 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:05:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:21,310 INFO L93 Difference]: Finished difference Result 4835 states and 14815 transitions. [2021-06-05 17:05:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:05:21,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 17:05:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:21,317 INFO L225 Difference]: With dead ends: 4835 [2021-06-05 17:05:21,317 INFO L226 Difference]: Without dead ends: 4835 [2021-06-05 17:05:21,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:05:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2021-06-05 17:05:21,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 1938. [2021-06-05 17:05:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4460505937016004) internal successors, (6675), 1937 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:21,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6675 transitions. [2021-06-05 17:05:21,351 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6675 transitions. Word has length 28 [2021-06-05 17:05:21,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:21,351 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 6675 transitions. [2021-06-05 17:05:21,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:05:21,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6675 transitions. [2021-06-05 17:05:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:21,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:21,353 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:21,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 17:05:21,554 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash 970325317, now seen corresponding path program 70 times [2021-06-05 17:05:21,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:21,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738580030] [2021-06-05 17:05:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:21,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738580030] [2021-06-05 17:05:21,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738580030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:21,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398009511] [2021-06-05 17:05:21,593 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:21,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:21,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:21,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398009511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:21,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:21,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:05:21,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979921446] [2021-06-05 17:05:21,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:21,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:21,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:21,700 INFO L87 Difference]: Start difference. First operand 1938 states and 6675 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:22,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:22,226 INFO L93 Difference]: Finished difference Result 4254 states and 13212 transitions. [2021-06-05 17:05:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:05:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:05:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:22,232 INFO L225 Difference]: With dead ends: 4254 [2021-06-05 17:05:22,232 INFO L226 Difference]: Without dead ends: 4254 [2021-06-05 17:05:22,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:05:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-06-05 17:05:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 1994. [2021-06-05 17:05:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.431008529854491) internal successors, (6838), 1993 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6838 transitions. [2021-06-05 17:05:22,265 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6838 transitions. Word has length 28 [2021-06-05 17:05:22,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:22,266 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 6838 transitions. [2021-06-05 17:05:22,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6838 transitions. [2021-06-05 17:05:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:22,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:22,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:22,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 17:05:22,481 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash 828956685, now seen corresponding path program 56 times [2021-06-05 17:05:22,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:22,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800051138] [2021-06-05 17:05:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:22,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800051138] [2021-06-05 17:05:22,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800051138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201336201] [2021-06-05 17:05:22,506 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:22,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:22,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:22,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:05:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:22,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201336201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:22,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:22,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:05:22,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119962965] [2021-06-05 17:05:22,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:05:22,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:22,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:05:22,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:05:22,585 INFO L87 Difference]: Start difference. First operand 1994 states and 6838 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 17:05:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:22,733 INFO L93 Difference]: Finished difference Result 3480 states and 11300 transitions. [2021-06-05 17:05:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:05:22,733 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 28 [2021-06-05 17:05:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:22,737 INFO L225 Difference]: With dead ends: 3480 [2021-06-05 17:05:22,737 INFO L226 Difference]: Without dead ends: 3462 [2021-06-05 17:05:22,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:05:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-06-05 17:05:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2379. [2021-06-05 17:05:22,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.5025231286795626) internal successors, (8329), 2378 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:22,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 8329 transitions. [2021-06-05 17:05:22,768 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 8329 transitions. Word has length 28 [2021-06-05 17:05:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:22,768 INFO L482 AbstractCegarLoop]: Abstraction has 2379 states and 8329 transitions. [2021-06-05 17:05:22,768 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 17:05:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 8329 transitions. [2021-06-05 17:05:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:22,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:22,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:22,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:22,980 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:22,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:22,980 INFO L82 PathProgramCache]: Analyzing trace with hash 391987977, now seen corresponding path program 57 times [2021-06-05 17:05:22,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:22,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919623757] [2021-06-05 17:05:22,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:23,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919623757] [2021-06-05 17:05:23,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919623757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:23,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915549024] [2021-06-05 17:05:23,010 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:23,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:05:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:23,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:23,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:23,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915549024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:23,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:23,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:05:23,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362671871] [2021-06-05 17:05:23,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:23,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:23,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:23,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:23,118 INFO L87 Difference]: Start difference. First operand 2379 states and 8329 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:05:23,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:23,648 INFO L93 Difference]: Finished difference Result 4139 states and 13172 transitions. [2021-06-05 17:05:23,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:05:23,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:05:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:23,654 INFO L225 Difference]: With dead ends: 4139 [2021-06-05 17:05:23,654 INFO L226 Difference]: Without dead ends: 4092 [2021-06-05 17:05:23,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:05:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-06-05 17:05:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 2547. [2021-06-05 17:05:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2547 states, 2546 states have (on average 3.52356637863315) internal successors, (8971), 2546 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:23,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2547 states to 2547 states and 8971 transitions. [2021-06-05 17:05:23,692 INFO L78 Accepts]: Start accepts. Automaton has 2547 states and 8971 transitions. Word has length 28 [2021-06-05 17:05:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:23,692 INFO L482 AbstractCegarLoop]: Abstraction has 2547 states and 8971 transitions. [2021-06-05 17:05:23,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:05:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2547 states and 8971 transitions. [2021-06-05 17:05:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:23,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:23,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:23,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 17:05:23,896 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:23,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1371854597, now seen corresponding path program 71 times [2021-06-05 17:05:23,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:23,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680168492] [2021-06-05 17:05:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:23,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:23,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680168492] [2021-06-05 17:05:23,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680168492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:23,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289689394] [2021-06-05 17:05:23,932 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:23,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:24,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289689394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:24,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 17:05:24,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790728365] [2021-06-05 17:05:24,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:05:24,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:05:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:05:24,047 INFO L87 Difference]: Start difference. First operand 2547 states and 8971 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 17:05:24,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:24,430 INFO L93 Difference]: Finished difference Result 4980 states and 16523 transitions. [2021-06-05 17:05:24,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:05:24,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 28 [2021-06-05 17:05:24,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:24,437 INFO L225 Difference]: With dead ends: 4980 [2021-06-05 17:05:24,437 INFO L226 Difference]: Without dead ends: 4893 [2021-06-05 17:05:24,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:05:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4893 states. [2021-06-05 17:05:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4893 to 3198. [2021-06-05 17:05:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3198 states, 3197 states have (on average 3.5376915858617455) internal successors, (11310), 3197 states have internal predecessors, (11310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3198 states to 3198 states and 11310 transitions. [2021-06-05 17:05:24,487 INFO L78 Accepts]: Start accepts. Automaton has 3198 states and 11310 transitions. Word has length 28 [2021-06-05 17:05:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:24,487 INFO L482 AbstractCegarLoop]: Abstraction has 3198 states and 11310 transitions. [2021-06-05 17:05:24,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 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 17:05:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3198 states and 11310 transitions. [2021-06-05 17:05:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:24,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:24,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:24,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2021-06-05 17:05:24,705 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1928077453, now seen corresponding path program 58 times [2021-06-05 17:05:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:24,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720593220] [2021-06-05 17:05:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:24,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:24,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720593220] [2021-06-05 17:05:24,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720593220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243890962] [2021-06-05 17:05:24,736 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:24,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:24,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:24,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243890962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:24,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:24,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:05:24,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984128123] [2021-06-05 17:05:24,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:24,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:24,839 INFO L87 Difference]: Start difference. First operand 3198 states and 11310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:25,465 INFO L93 Difference]: Finished difference Result 5423 states and 17174 transitions. [2021-06-05 17:05:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:05:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:05:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:25,471 INFO L225 Difference]: With dead ends: 5423 [2021-06-05 17:05:25,471 INFO L226 Difference]: Without dead ends: 5397 [2021-06-05 17:05:25,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 422.1ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:05:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-06-05 17:05:25,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 3216. [2021-06-05 17:05:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 3.5430793157076206) internal successors, (11391), 3215 states have internal predecessors, (11391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 11391 transitions. [2021-06-05 17:05:25,525 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 11391 transitions. Word has length 28 [2021-06-05 17:05:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:25,525 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 11391 transitions. [2021-06-05 17:05:25,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 11391 transitions. [2021-06-05 17:05:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:25,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:25,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:25,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:25,730 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:25,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1694477061, now seen corresponding path program 59 times [2021-06-05 17:05:25,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:25,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132370708] [2021-06-05 17:05:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:25,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132370708] [2021-06-05 17:05:25,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132370708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159604743] [2021-06-05 17:05:25,761 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:25,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:25,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:25,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:25,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:25,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159604743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:25,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:25,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:05:25,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903945495] [2021-06-05 17:05:25,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:25,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:25,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:25,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:25,866 INFO L87 Difference]: Start difference. First operand 3216 states and 11391 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:26,459 INFO L93 Difference]: Finished difference Result 5478 states and 17366 transitions. [2021-06-05 17:05:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:05:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:05:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:26,465 INFO L225 Difference]: With dead ends: 5478 [2021-06-05 17:05:26,465 INFO L226 Difference]: Without dead ends: 5447 [2021-06-05 17:05:26,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:05:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2021-06-05 17:05:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 3206. [2021-06-05 17:05:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3206 states, 3205 states have (on average 3.550390015600624) internal successors, (11379), 3205 states have internal predecessors, (11379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3206 states to 3206 states and 11379 transitions. [2021-06-05 17:05:26,519 INFO L78 Accepts]: Start accepts. Automaton has 3206 states and 11379 transitions. Word has length 28 [2021-06-05 17:05:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:26,519 INFO L482 AbstractCegarLoop]: Abstraction has 3206 states and 11379 transitions. [2021-06-05 17:05:26,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3206 states and 11379 transitions. [2021-06-05 17:05:26,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:26,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:26,523 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:26,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:26,723 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:26,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:26,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1551691313, now seen corresponding path program 60 times [2021-06-05 17:05:26,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:26,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842995866] [2021-06-05 17:05:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:26,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842995866] [2021-06-05 17:05:26,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842995866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544332218] [2021-06-05 17:05:26,759 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:26,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:26,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:26,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:26,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544332218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:26,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:26,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:05:26,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885175381] [2021-06-05 17:05:26,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:26,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:26,843 INFO L87 Difference]: Start difference. First operand 3206 states and 11379 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:05:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:27,347 INFO L93 Difference]: Finished difference Result 6636 states and 21425 transitions. [2021-06-05 17:05:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:05:27,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:05:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:27,355 INFO L225 Difference]: With dead ends: 6636 [2021-06-05 17:05:27,355 INFO L226 Difference]: Without dead ends: 6589 [2021-06-05 17:05:27,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:05:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6589 states. [2021-06-05 17:05:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6589 to 3369. [2021-06-05 17:05:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.5973871733966747) internal successors, (12116), 3368 states have internal predecessors, (12116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 12116 transitions. [2021-06-05 17:05:27,419 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 12116 transitions. Word has length 28 [2021-06-05 17:05:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:27,419 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 12116 transitions. [2021-06-05 17:05:27,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:05:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 12116 transitions. [2021-06-05 17:05:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:27,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:27,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:27,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:27,623 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:27,623 INFO L82 PathProgramCache]: Analyzing trace with hash -659497231, now seen corresponding path program 61 times [2021-06-05 17:05:27,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:27,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008083555] [2021-06-05 17:05:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:27,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:27,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008083555] [2021-06-05 17:05:27,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008083555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:27,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388965657] [2021-06-05 17:05:27,644 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:27,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:05:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:27,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388965657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:27,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:27,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 17:05:27,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680342200] [2021-06-05 17:05:27,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:05:27,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:27,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:05:27,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:05:27,730 INFO L87 Difference]: Start difference. First operand 3369 states and 12116 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 17:05:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:27,876 INFO L93 Difference]: Finished difference Result 5034 states and 16661 transitions. [2021-06-05 17:05:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:05:27,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-06-05 17:05:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:27,883 INFO L225 Difference]: With dead ends: 5034 [2021-06-05 17:05:27,883 INFO L226 Difference]: Without dead ends: 5034 [2021-06-05 17:05:27,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:05:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-06-05 17:05:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 3201. [2021-06-05 17:05:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 3.556875) internal successors, (11382), 3200 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 11382 transitions. [2021-06-05 17:05:27,930 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 11382 transitions. Word has length 28 [2021-06-05 17:05:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:27,930 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 11382 transitions. [2021-06-05 17:05:27,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 17:05:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 11382 transitions. [2021-06-05 17:05:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:27,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:27,934 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:28,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-05 17:05:28,134 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2006178797, now seen corresponding path program 62 times [2021-06-05 17:05:28,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:28,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186000418] [2021-06-05 17:05:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:28,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:28,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186000418] [2021-06-05 17:05:28,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186000418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:28,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422094751] [2021-06-05 17:05:28,169 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:28,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:28,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:28,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422094751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:28,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:28,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:05:28,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371196704] [2021-06-05 17:05:28,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:28,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:28,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:28,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:28,285 INFO L87 Difference]: Start difference. First operand 3201 states and 11382 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:05:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:28,846 INFO L93 Difference]: Finished difference Result 7123 states and 22742 transitions. [2021-06-05 17:05:28,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:05:28,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 17:05:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:28,856 INFO L225 Difference]: With dead ends: 7123 [2021-06-05 17:05:28,856 INFO L226 Difference]: Without dead ends: 7123 [2021-06-05 17:05:28,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:05:28,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2021-06-05 17:05:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 3231. [2021-06-05 17:05:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.556346749226006) internal successors, (11487), 3230 states have internal predecessors, (11487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 11487 transitions. [2021-06-05 17:05:28,922 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 11487 transitions. Word has length 28 [2021-06-05 17:05:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:28,922 INFO L482 AbstractCegarLoop]: Abstraction has 3231 states and 11487 transitions. [2021-06-05 17:05:28,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:05:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 11487 transitions. [2021-06-05 17:05:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:28,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:28,926 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:29,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 17:05:29,126 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1221264703, now seen corresponding path program 63 times [2021-06-05 17:05:29,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:29,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492510347] [2021-06-05 17:05:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:29,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:29,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492510347] [2021-06-05 17:05:29,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492510347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:29,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366895594] [2021-06-05 17:05:29,174 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:29,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:05:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:29,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:29,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366895594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:29,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:29,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:05:29,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524679578] [2021-06-05 17:05:29,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:29,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:29,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:29,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:29,273 INFO L87 Difference]: Start difference. First operand 3231 states and 11487 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:05:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:29,948 INFO L93 Difference]: Finished difference Result 7417 states and 23715 transitions. [2021-06-05 17:05:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:05:29,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 17:05:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:29,959 INFO L225 Difference]: With dead ends: 7417 [2021-06-05 17:05:29,959 INFO L226 Difference]: Without dead ends: 7417 [2021-06-05 17:05:29,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:05:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2021-06-05 17:05:30,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 3361. [2021-06-05 17:05:30,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 3.5398809523809525) internal successors, (11894), 3360 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 11894 transitions. [2021-06-05 17:05:30,030 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 11894 transitions. Word has length 28 [2021-06-05 17:05:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:30,030 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 11894 transitions. [2021-06-05 17:05:30,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:05:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 11894 transitions. [2021-06-05 17:05:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:30,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:30,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:30,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 17:05:30,234 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1990679937, now seen corresponding path program 64 times [2021-06-05 17:05:30,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:30,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741425045] [2021-06-05 17:05:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:30,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:30,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741425045] [2021-06-05 17:05:30,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741425045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:30,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457839322] [2021-06-05 17:05:30,263 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:30,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:30,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:30,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:30,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:30,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457839322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:30,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:30,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:05:30,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450375151] [2021-06-05 17:05:30,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:30,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:30,368 INFO L87 Difference]: Start difference. First operand 3361 states and 11894 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:05:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:30,879 INFO L93 Difference]: Finished difference Result 7892 states and 25256 transitions. [2021-06-05 17:05:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:05:30,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:05:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:30,889 INFO L225 Difference]: With dead ends: 7892 [2021-06-05 17:05:30,889 INFO L226 Difference]: Without dead ends: 7879 [2021-06-05 17:05:30,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:05:30,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2021-06-05 17:05:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 4006. [2021-06-05 17:05:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4005 states have (on average 3.5845193508114854) internal successors, (14356), 4005 states have internal predecessors, (14356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 14356 transitions. [2021-06-05 17:05:30,970 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 14356 transitions. Word has length 28 [2021-06-05 17:05:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:30,970 INFO L482 AbstractCegarLoop]: Abstraction has 4006 states and 14356 transitions. [2021-06-05 17:05:30,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:05:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 14356 transitions. [2021-06-05 17:05:30,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:30,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:30,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:31,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 17:05:31,175 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:31,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash -833209241, now seen corresponding path program 65 times [2021-06-05 17:05:31,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:31,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411487251] [2021-06-05 17:05:31,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:31,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411487251] [2021-06-05 17:05:31,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411487251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:31,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447597691] [2021-06-05 17:05:31,204 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:31,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:31,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447597691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:31,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:31,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:05:31,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563360926] [2021-06-05 17:05:31,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:31,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:31,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:31,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:31,292 INFO L87 Difference]: Start difference. First operand 4006 states and 14356 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:05:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:31,821 INFO L93 Difference]: Finished difference Result 8151 states and 25974 transitions. [2021-06-05 17:05:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:05:31,821 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:05:31,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:31,832 INFO L225 Difference]: With dead ends: 8151 [2021-06-05 17:05:31,832 INFO L226 Difference]: Without dead ends: 8151 [2021-06-05 17:05:31,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:05:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-05 17:05:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 3759. [2021-06-05 17:05:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 3.5494944119212346) internal successors, (13339), 3758 states have internal predecessors, (13339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 13339 transitions. [2021-06-05 17:05:31,909 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 13339 transitions. Word has length 28 [2021-06-05 17:05:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:31,910 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 13339 transitions. [2021-06-05 17:05:31,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:05:31,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 13339 transitions. [2021-06-05 17:05:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:31,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:31,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:32,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 17:05:32,114 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:32,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1266085845, now seen corresponding path program 66 times [2021-06-05 17:05:32,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:32,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785598477] [2021-06-05 17:05:32,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:32,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:32,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785598477] [2021-06-05 17:05:32,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785598477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:32,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010709059] [2021-06-05 17:05:32,145 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:32,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:05:32,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:32,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:32,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:32,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010709059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:32,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:32,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:05:32,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146784545] [2021-06-05 17:05:32,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:32,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:32,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:32,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:32,229 INFO L87 Difference]: Start difference. First operand 3759 states and 13339 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:05:32,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:32,863 INFO L93 Difference]: Finished difference Result 7259 states and 23813 transitions. [2021-06-05 17:05:32,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:05:32,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 17:05:32,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:32,874 INFO L225 Difference]: With dead ends: 7259 [2021-06-05 17:05:32,874 INFO L226 Difference]: Without dead ends: 7255 [2021-06-05 17:05:32,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:05:32,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7255 states. [2021-06-05 17:05:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7255 to 3392. [2021-06-05 17:05:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.5956944854025363) internal successors, (12193), 3391 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 12193 transitions. [2021-06-05 17:05:32,946 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 12193 transitions. Word has length 28 [2021-06-05 17:05:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:32,946 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 12193 transitions. [2021-06-05 17:05:32,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:05:32,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 12193 transitions. [2021-06-05 17:05:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:32,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:32,950 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:33,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 17:05:33,151 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1538095035, now seen corresponding path program 67 times [2021-06-05 17:05:33,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:33,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341599403] [2021-06-05 17:05:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:33,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:33,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341599403] [2021-06-05 17:05:33,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341599403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:33,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258771702] [2021-06-05 17:05:33,182 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:33,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:33,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258771702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:33,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:33,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:05:33,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635924937] [2021-06-05 17:05:33,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:33,289 INFO L87 Difference]: Start difference. First operand 3392 states and 12193 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 17:05:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:34,214 INFO L93 Difference]: Finished difference Result 11542 states and 38132 transitions. [2021-06-05 17:05:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:05:34,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-05 17:05:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:34,232 INFO L225 Difference]: With dead ends: 11542 [2021-06-05 17:05:34,232 INFO L226 Difference]: Without dead ends: 11542 [2021-06-05 17:05:34,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:05:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2021-06-05 17:05:34,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 3680. [2021-06-05 17:05:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3680 states, 3679 states have (on average 3.678173416689318) internal successors, (13532), 3679 states have internal predecessors, (13532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3680 states to 3680 states and 13532 transitions. [2021-06-05 17:05:34,338 INFO L78 Accepts]: Start accepts. Automaton has 3680 states and 13532 transitions. Word has length 28 [2021-06-05 17:05:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:34,338 INFO L482 AbstractCegarLoop]: Abstraction has 3680 states and 13532 transitions. [2021-06-05 17:05:34,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 17:05:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3680 states and 13532 transitions. [2021-06-05 17:05:34,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:34,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:34,342 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:34,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:34,543 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:34,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:34,543 INFO L82 PathProgramCache]: Analyzing trace with hash -971142955, now seen corresponding path program 68 times [2021-06-05 17:05:34,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:34,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823281243] [2021-06-05 17:05:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:34,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:34,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823281243] [2021-06-05 17:05:34,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823281243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:34,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754591196] [2021-06-05 17:05:34,584 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:34,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:34,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:34,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:34,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:34,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754591196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:34,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:34,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:05:34,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538606008] [2021-06-05 17:05:34,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:34,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:34,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:34,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:34,692 INFO L87 Difference]: Start difference. First operand 3680 states and 13532 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 17:05:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:35,582 INFO L93 Difference]: Finished difference Result 11234 states and 37308 transitions. [2021-06-05 17:05:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:05:35,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 28 [2021-06-05 17:05:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:35,600 INFO L225 Difference]: With dead ends: 11234 [2021-06-05 17:05:35,600 INFO L226 Difference]: Without dead ends: 11234 [2021-06-05 17:05:35,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:05:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11234 states. [2021-06-05 17:05:35,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11234 to 3634. [2021-06-05 17:05:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 3.6584090283512247) internal successors, (13291), 3633 states have internal predecessors, (13291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 13291 transitions. [2021-06-05 17:05:35,718 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 13291 transitions. Word has length 28 [2021-06-05 17:05:35,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:35,718 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 13291 transitions. [2021-06-05 17:05:35,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 17:05:35,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 13291 transitions. [2021-06-05 17:05:35,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:35,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:35,722 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:35,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 17:05:35,934 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:35,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:35,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2143488813, now seen corresponding path program 69 times [2021-06-05 17:05:35,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:35,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271504281] [2021-06-05 17:05:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:35,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:35,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271504281] [2021-06-05 17:05:35,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271504281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:35,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723297257] [2021-06-05 17:05:35,962 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:35,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:05:35,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:35,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:35,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:36,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723297257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:36,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:36,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:05:36,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490892948] [2021-06-05 17:05:36,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:36,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:36,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:36,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:36,061 INFO L87 Difference]: Start difference. First operand 3634 states and 13291 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 17:05:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:36,856 INFO L93 Difference]: Finished difference Result 10540 states and 33835 transitions. [2021-06-05 17:05:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:05:36,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-05 17:05:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:36,872 INFO L225 Difference]: With dead ends: 10540 [2021-06-05 17:05:36,872 INFO L226 Difference]: Without dead ends: 10540 [2021-06-05 17:05:36,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 437.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:05:36,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10540 states. [2021-06-05 17:05:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10540 to 3674. [2021-06-05 17:05:36,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 3.662673563844269) internal successors, (13453), 3673 states have internal predecessors, (13453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 13453 transitions. [2021-06-05 17:05:36,982 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 13453 transitions. Word has length 28 [2021-06-05 17:05:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:36,982 INFO L482 AbstractCegarLoop]: Abstraction has 3674 states and 13453 transitions. [2021-06-05 17:05:36,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 17:05:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 13453 transitions. [2021-06-05 17:05:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:36,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:36,987 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:37,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:37,187 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:37,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2062112725, now seen corresponding path program 70 times [2021-06-05 17:05:37,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:37,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687168513] [2021-06-05 17:05:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:37,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:37,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687168513] [2021-06-05 17:05:37,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687168513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:37,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593914840] [2021-06-05 17:05:37,217 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:37,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:37,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:37,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:37,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:37,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593914840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:37,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:37,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:05:37,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648513409] [2021-06-05 17:05:37,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:37,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:37,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:37,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:37,309 INFO L87 Difference]: Start difference. First operand 3674 states and 13453 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 17:05:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:38,111 INFO L93 Difference]: Finished difference Result 9924 states and 32320 transitions. [2021-06-05 17:05:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:05:38,112 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-05 17:05:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:38,126 INFO L225 Difference]: With dead ends: 9924 [2021-06-05 17:05:38,127 INFO L226 Difference]: Without dead ends: 9916 [2021-06-05 17:05:38,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:05:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9916 states. [2021-06-05 17:05:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9916 to 3640. [2021-06-05 17:05:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 3.6575982412750756) internal successors, (13310), 3639 states have internal predecessors, (13310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:38,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 13310 transitions. [2021-06-05 17:05:38,240 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 13310 transitions. Word has length 28 [2021-06-05 17:05:38,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:38,240 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 13310 transitions. [2021-06-05 17:05:38,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 17:05:38,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 13310 transitions. [2021-06-05 17:05:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:38,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:38,244 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:38,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:38,451 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:38,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:38,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1131455509, now seen corresponding path program 71 times [2021-06-05 17:05:38,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:38,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538301037] [2021-06-05 17:05:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:38,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:38,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:38,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538301037] [2021-06-05 17:05:38,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538301037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:38,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806862243] [2021-06-05 17:05:38,482 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:38,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:05:38,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:38,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:38,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806862243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:38,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:38,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:05:38,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670961075] [2021-06-05 17:05:38,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:38,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:38,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:38,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:38,592 INFO L87 Difference]: Start difference. First operand 3640 states and 13310 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:39,413 INFO L93 Difference]: Finished difference Result 9536 states and 31236 transitions. [2021-06-05 17:05:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 17:05:39,414 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:05:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:39,428 INFO L225 Difference]: With dead ends: 9536 [2021-06-05 17:05:39,428 INFO L226 Difference]: Without dead ends: 9536 [2021-06-05 17:05:39,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:05:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9536 states. [2021-06-05 17:05:39,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9536 to 3656. [2021-06-05 17:05:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 3.6590971272229824) internal successors, (13374), 3655 states have internal predecessors, (13374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13374 transitions. [2021-06-05 17:05:39,515 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13374 transitions. Word has length 28 [2021-06-05 17:05:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:39,515 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 13374 transitions. [2021-06-05 17:05:39,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:39,515 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13374 transitions. [2021-06-05 17:05:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:39,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:39,519 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:39,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:39,720 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 511583645, now seen corresponding path program 72 times [2021-06-05 17:05:39,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:39,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432192659] [2021-06-05 17:05:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:39,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432192659] [2021-06-05 17:05:39,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432192659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021751784] [2021-06-05 17:05:39,756 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:39,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:05:39,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:39,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:39,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:39,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021751784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:39,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:39,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:05:39,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248037262] [2021-06-05 17:05:39,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:39,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:39,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:39,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:39,858 INFO L87 Difference]: Start difference. First operand 3656 states and 13374 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:40,710 INFO L93 Difference]: Finished difference Result 9201 states and 30441 transitions. [2021-06-05 17:05:40,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:05:40,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:05:40,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:40,723 INFO L225 Difference]: With dead ends: 9201 [2021-06-05 17:05:40,723 INFO L226 Difference]: Without dead ends: 9193 [2021-06-05 17:05:40,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 466.0ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:05:40,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9193 states. [2021-06-05 17:05:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9193 to 3324. [2021-06-05 17:05:40,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 3323 states have (on average 3.570869696057779) internal successors, (11866), 3323 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 11866 transitions. [2021-06-05 17:05:40,800 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 11866 transitions. Word has length 28 [2021-06-05 17:05:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:40,800 INFO L482 AbstractCegarLoop]: Abstraction has 3324 states and 11866 transitions. [2021-06-05 17:05:40,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 11866 transitions. [2021-06-05 17:05:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:40,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:40,804 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:41,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:41,017 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash 594987225, now seen corresponding path program 73 times [2021-06-05 17:05:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:41,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213897039] [2021-06-05 17:05:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:41,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:41,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213897039] [2021-06-05 17:05:41,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213897039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:41,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814612541] [2021-06-05 17:05:41,048 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:41,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:41,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814612541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:41,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:41,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:05:41,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507137913] [2021-06-05 17:05:41,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:05:41,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:05:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:05:41,155 INFO L87 Difference]: Start difference. First operand 3324 states and 11866 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:05:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:41,888 INFO L93 Difference]: Finished difference Result 6988 states and 22842 transitions. [2021-06-05 17:05:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:05:41,889 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 17:05:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:41,898 INFO L225 Difference]: With dead ends: 6988 [2021-06-05 17:05:41,898 INFO L226 Difference]: Without dead ends: 6988 [2021-06-05 17:05:41,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:05:41,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-05 17:05:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 3336. [2021-06-05 17:05:41,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 3.569415292353823) internal successors, (11904), 3335 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 11904 transitions. [2021-06-05 17:05:41,978 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 11904 transitions. Word has length 28 [2021-06-05 17:05:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:41,978 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 11904 transitions. [2021-06-05 17:05:41,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:05:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 11904 transitions. [2021-06-05 17:05:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:41,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:41,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:42,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-06-05 17:05:42,182 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:42,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2046619895, now seen corresponding path program 74 times [2021-06-05 17:05:42,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:42,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370992619] [2021-06-05 17:05:42,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:42,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:42,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370992619] [2021-06-05 17:05:42,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370992619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:42,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403523535] [2021-06-05 17:05:42,214 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:42,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:42,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:42,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:42,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:42,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403523535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:42,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:42,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:05:42,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254848113] [2021-06-05 17:05:42,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:05:42,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:05:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:05:42,331 INFO L87 Difference]: Start difference. First operand 3336 states and 11904 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:43,242 INFO L93 Difference]: Finished difference Result 7916 states and 25231 transitions. [2021-06-05 17:05:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:05:43,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:05:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:43,253 INFO L225 Difference]: With dead ends: 7916 [2021-06-05 17:05:43,253 INFO L226 Difference]: Without dead ends: 7916 [2021-06-05 17:05:43,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:05:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2021-06-05 17:05:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 3402. [2021-06-05 17:05:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 3.5639517788885624) internal successors, (12121), 3401 states have internal predecessors, (12121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 12121 transitions. [2021-06-05 17:05:43,354 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 12121 transitions. Word has length 28 [2021-06-05 17:05:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:43,354 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 12121 transitions. [2021-06-05 17:05:43,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 12121 transitions. [2021-06-05 17:05:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:43,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:43,358 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:43,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 17:05:43,559 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:43,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:43,559 INFO L82 PathProgramCache]: Analyzing trace with hash -403580741, now seen corresponding path program 75 times [2021-06-05 17:05:43,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:43,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256969786] [2021-06-05 17:05:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:43,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:43,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256969786] [2021-06-05 17:05:43,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256969786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:43,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347343941] [2021-06-05 17:05:43,593 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:43,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:05:43,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:43,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:43,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:43,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347343941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:43,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:43,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:05:43,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157014217] [2021-06-05 17:05:43,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:05:43,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:43,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:05:43,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:05:43,719 INFO L87 Difference]: Start difference. First operand 3402 states and 12121 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:44,622 INFO L93 Difference]: Finished difference Result 7299 states and 23603 transitions. [2021-06-05 17:05:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:05:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:05:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:44,633 INFO L225 Difference]: With dead ends: 7299 [2021-06-05 17:05:44,633 INFO L226 Difference]: Without dead ends: 7295 [2021-06-05 17:05:44,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 562.6ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:05:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7295 states. [2021-06-05 17:05:44,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7295 to 3337. [2021-06-05 17:05:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3336 states have (on average 3.5617505995203835) internal successors, (11882), 3336 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 11882 transitions. [2021-06-05 17:05:44,701 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 11882 transitions. Word has length 28 [2021-06-05 17:05:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:44,701 INFO L482 AbstractCegarLoop]: Abstraction has 3337 states and 11882 transitions. [2021-06-05 17:05:44,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 11882 transitions. [2021-06-05 17:05:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:44,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:44,705 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:44,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 17:05:44,905 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:44,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:44,906 INFO L82 PathProgramCache]: Analyzing trace with hash 175862483, now seen corresponding path program 72 times [2021-06-05 17:05:44,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:44,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136309057] [2021-06-05 17:05:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:44,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:44,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136309057] [2021-06-05 17:05:44,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136309057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:44,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122550443] [2021-06-05 17:05:44,942 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:44,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:05:44,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:44,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:44,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122550443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:45,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:45,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:05:45,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249761918] [2021-06-05 17:05:45,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:45,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:45,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:45,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:45,034 INFO L87 Difference]: Start difference. First operand 3337 states and 11882 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:45,548 INFO L93 Difference]: Finished difference Result 6442 states and 21191 transitions. [2021-06-05 17:05:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:05:45,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 17:05:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:45,557 INFO L225 Difference]: With dead ends: 6442 [2021-06-05 17:05:45,557 INFO L226 Difference]: Without dead ends: 6442 [2021-06-05 17:05:45,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:05:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6442 states. [2021-06-05 17:05:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6442 to 3341. [2021-06-05 17:05:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3341 states, 3340 states have (on average 3.5634730538922157) internal successors, (11902), 3340 states have internal predecessors, (11902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3341 states to 3341 states and 11902 transitions. [2021-06-05 17:05:45,612 INFO L78 Accepts]: Start accepts. Automaton has 3341 states and 11902 transitions. Word has length 28 [2021-06-05 17:05:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:45,612 INFO L482 AbstractCegarLoop]: Abstraction has 3341 states and 11902 transitions. [2021-06-05 17:05:45,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3341 states and 11902 transitions. [2021-06-05 17:05:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:45,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:45,616 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:45,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 17:05:45,816 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:45,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1435937279, now seen corresponding path program 73 times [2021-06-05 17:05:45,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:45,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378735182] [2021-06-05 17:05:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:45,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:45,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378735182] [2021-06-05 17:05:45,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378735182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:45,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622585994] [2021-06-05 17:05:45,863 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:45,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:45,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622585994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:45,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:45,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:05:45,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114958468] [2021-06-05 17:05:45,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:45,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:45,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:45,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:45,959 INFO L87 Difference]: Start difference. First operand 3341 states and 11902 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:46,618 INFO L93 Difference]: Finished difference Result 6916 states and 22513 transitions. [2021-06-05 17:05:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:05:46,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 17:05:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:46,628 INFO L225 Difference]: With dead ends: 6916 [2021-06-05 17:05:46,628 INFO L226 Difference]: Without dead ends: 6916 [2021-06-05 17:05:46,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:05:46,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6916 states. [2021-06-05 17:05:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6916 to 3355. [2021-06-05 17:05:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 3.5608228980322005) internal successors, (11943), 3354 states have internal predecessors, (11943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 11943 transitions. [2021-06-05 17:05:46,715 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 11943 transitions. Word has length 28 [2021-06-05 17:05:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:46,716 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 11943 transitions. [2021-06-05 17:05:46,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 11943 transitions. [2021-06-05 17:05:46,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:46,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:46,720 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:46,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 17:05:46,920 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:46,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1667476927, now seen corresponding path program 74 times [2021-06-05 17:05:46,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:46,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266065428] [2021-06-05 17:05:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:46,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266065428] [2021-06-05 17:05:46,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266065428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:46,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640361205] [2021-06-05 17:05:46,959 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:46,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:46,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:46,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:47,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640361205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:47,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:47,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:05:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503430084] [2021-06-05 17:05:47,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:47,051 INFO L87 Difference]: Start difference. First operand 3355 states and 11943 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:47,778 INFO L93 Difference]: Finished difference Result 7422 states and 23945 transitions. [2021-06-05 17:05:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:05:47,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 17:05:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:47,788 INFO L225 Difference]: With dead ends: 7422 [2021-06-05 17:05:47,788 INFO L226 Difference]: Without dead ends: 7422 [2021-06-05 17:05:47,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 443.5ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:05:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7422 states. [2021-06-05 17:05:47,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7422 to 3435. [2021-06-05 17:05:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.554164239953407) internal successors, (12205), 3434 states have internal predecessors, (12205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 12205 transitions. [2021-06-05 17:05:47,864 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 12205 transitions. Word has length 28 [2021-06-05 17:05:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:47,864 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 12205 transitions. [2021-06-05 17:05:47,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 12205 transitions. [2021-06-05 17:05:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:47,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:47,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:48,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 17:05:48,069 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1647761113, now seen corresponding path program 75 times [2021-06-05 17:05:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:48,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335087445] [2021-06-05 17:05:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:48,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:48,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335087445] [2021-06-05 17:05:48,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335087445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:48,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114833153] [2021-06-05 17:05:48,103 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:48,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:05:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:48,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:48,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:48,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:48,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114833153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:48,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:48,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:05:48,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061033193] [2021-06-05 17:05:48,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:05:48,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:48,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:05:48,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:05:48,210 INFO L87 Difference]: Start difference. First operand 3435 states and 12205 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 17:05:48,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:48,703 INFO L93 Difference]: Finished difference Result 7221 states and 24725 transitions. [2021-06-05 17:05:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:05:48,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 28 [2021-06-05 17:05:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:48,714 INFO L225 Difference]: With dead ends: 7221 [2021-06-05 17:05:48,714 INFO L226 Difference]: Without dead ends: 7221 [2021-06-05 17:05:48,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:05:48,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7221 states. [2021-06-05 17:05:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7221 to 4565. [2021-06-05 17:05:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4565 states, 4564 states have (on average 3.672655565293602) internal successors, (16762), 4564 states have internal predecessors, (16762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:48,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4565 states to 4565 states and 16762 transitions. [2021-06-05 17:05:48,798 INFO L78 Accepts]: Start accepts. Automaton has 4565 states and 16762 transitions. Word has length 28 [2021-06-05 17:05:48,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:48,798 INFO L482 AbstractCegarLoop]: Abstraction has 4565 states and 16762 transitions. [2021-06-05 17:05:48,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 17:05:48,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4565 states and 16762 transitions. [2021-06-05 17:05:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:48,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:48,804 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:49,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 17:05:49,004 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:49,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1712298069, now seen corresponding path program 76 times [2021-06-05 17:05:49,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:49,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561493753] [2021-06-05 17:05:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:49,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:49,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561493753] [2021-06-05 17:05:49,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561493753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:49,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404715470] [2021-06-05 17:05:49,040 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:49,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:49,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:49,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404715470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:49,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:49,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:05:49,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267025957] [2021-06-05 17:05:49,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:49,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:49,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:49,124 INFO L87 Difference]: Start difference. First operand 4565 states and 16762 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:49,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:49,792 INFO L93 Difference]: Finished difference Result 8350 states and 28540 transitions. [2021-06-05 17:05:49,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:05:49,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 28 [2021-06-05 17:05:49,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:49,805 INFO L225 Difference]: With dead ends: 8350 [2021-06-05 17:05:49,805 INFO L226 Difference]: Without dead ends: 8346 [2021-06-05 17:05:49,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:05:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2021-06-05 17:05:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 4457. [2021-06-05 17:05:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 3.683572710951526) internal successors, (16414), 4456 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 16414 transitions. [2021-06-05 17:05:49,918 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 16414 transitions. Word has length 28 [2021-06-05 17:05:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:49,918 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 16414 transitions. [2021-06-05 17:05:49,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 17:05:49,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 16414 transitions. [2021-06-05 17:05:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:49,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:49,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:50,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 17:05:50,123 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:50,124 INFO L82 PathProgramCache]: Analyzing trace with hash 307959399, now seen corresponding path program 76 times [2021-06-05 17:05:50,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:50,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707663616] [2021-06-05 17:05:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:50,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707663616] [2021-06-05 17:05:50,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707663616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:50,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909870054] [2021-06-05 17:05:50,154 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:50,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:50,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909870054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:50,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:50,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:05:50,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720705932] [2021-06-05 17:05:50,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:50,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:50,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:50,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:50,250 INFO L87 Difference]: Start difference. First operand 4457 states and 16414 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:05:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:50,978 INFO L93 Difference]: Finished difference Result 9491 states and 32102 transitions. [2021-06-05 17:05:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:05:50,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:05:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:50,992 INFO L225 Difference]: With dead ends: 9491 [2021-06-05 17:05:50,992 INFO L226 Difference]: Without dead ends: 9479 [2021-06-05 17:05:50,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:05:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-06-05 17:05:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 4937. [2021-06-05 17:05:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 3.7670178282009723) internal successors, (18594), 4936 states have internal predecessors, (18594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:51,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 18594 transitions. [2021-06-05 17:05:51,089 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 18594 transitions. Word has length 28 [2021-06-05 17:05:51,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:51,089 INFO L482 AbstractCegarLoop]: Abstraction has 4937 states and 18594 transitions. [2021-06-05 17:05:51,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:05:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 18594 transitions. [2021-06-05 17:05:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:51,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:51,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:51,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:51,296 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:51,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:51,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1945666497, now seen corresponding path program 77 times [2021-06-05 17:05:51,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:51,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094434207] [2021-06-05 17:05:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:51,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:51,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094434207] [2021-06-05 17:05:51,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094434207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:51,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851091287] [2021-06-05 17:05:51,321 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:51,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:05:51,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:51,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851091287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:51,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:51,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:05:51,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351860655] [2021-06-05 17:05:51,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:05:51,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:05:51,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:05:51,418 INFO L87 Difference]: Start difference. First operand 4937 states and 18594 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:05:52,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:52,150 INFO L93 Difference]: Finished difference Result 9821 states and 33130 transitions. [2021-06-05 17:05:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:05:52,151 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:05:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:52,165 INFO L225 Difference]: With dead ends: 9821 [2021-06-05 17:05:52,165 INFO L226 Difference]: Without dead ends: 9821 [2021-06-05 17:05:52,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:05:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2021-06-05 17:05:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 4957. [2021-06-05 17:05:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.7516142050040355) internal successors, (18593), 4956 states have internal predecessors, (18593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 18593 transitions. [2021-06-05 17:05:52,264 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 18593 transitions. Word has length 28 [2021-06-05 17:05:52,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:52,264 INFO L482 AbstractCegarLoop]: Abstraction has 4957 states and 18593 transitions. [2021-06-05 17:05:52,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:05:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 18593 transitions. [2021-06-05 17:05:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:52,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:52,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:52,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:52,470 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:52,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:52,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1145894509, now seen corresponding path program 78 times [2021-06-05 17:05:52,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:52,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006262579] [2021-06-05 17:05:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:52,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:52,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006262579] [2021-06-05 17:05:52,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006262579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:52,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977957560] [2021-06-05 17:05:52,502 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:52,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:05:52,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:52,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:52,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977957560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:52,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:52,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:05:52,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120452333] [2021-06-05 17:05:52,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:05:52,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:05:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:05:52,583 INFO L87 Difference]: Start difference. First operand 4957 states and 18593 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:05:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:52,965 INFO L93 Difference]: Finished difference Result 9285 states and 33102 transitions. [2021-06-05 17:05:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:05:52,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:05:52,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:52,979 INFO L225 Difference]: With dead ends: 9285 [2021-06-05 17:05:52,979 INFO L226 Difference]: Without dead ends: 9202 [2021-06-05 17:05:52,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:05:52,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9202 states. [2021-06-05 17:05:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9202 to 6390. [2021-06-05 17:05:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6389 states have (on average 3.796994834872437) internal successors, (24259), 6389 states have internal predecessors, (24259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:53,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 24259 transitions. [2021-06-05 17:05:53,103 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 24259 transitions. Word has length 28 [2021-06-05 17:05:53,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:53,103 INFO L482 AbstractCegarLoop]: Abstraction has 6390 states and 24259 transitions. [2021-06-05 17:05:53,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:05:53,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 24259 transitions. [2021-06-05 17:05:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:53,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:53,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:53,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 17:05:53,313 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:53,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1941057807, now seen corresponding path program 79 times [2021-06-05 17:05:53,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:53,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953568783] [2021-06-05 17:05:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:53,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:53,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953568783] [2021-06-05 17:05:53,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953568783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:53,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091353980] [2021-06-05 17:05:53,341 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:05:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:53,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091353980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:53,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:53,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:05:53,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591784365] [2021-06-05 17:05:53,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:05:53,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:53,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:05:53,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:05:53,422 INFO L87 Difference]: Start difference. First operand 6390 states and 24259 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 17:05:53,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:53,580 INFO L93 Difference]: Finished difference Result 8836 states and 31362 transitions. [2021-06-05 17:05:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:05:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 28 [2021-06-05 17:05:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:53,594 INFO L225 Difference]: With dead ends: 8836 [2021-06-05 17:05:53,594 INFO L226 Difference]: Without dead ends: 8836 [2021-06-05 17:05:53,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:05:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-05 17:05:53,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6536. [2021-06-05 17:05:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6536 states, 6535 states have (on average 3.7749043611323643) internal successors, (24669), 6535 states have internal predecessors, (24669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 24669 transitions. [2021-06-05 17:05:53,705 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 24669 transitions. Word has length 28 [2021-06-05 17:05:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:53,706 INFO L482 AbstractCegarLoop]: Abstraction has 6536 states and 24669 transitions. [2021-06-05 17:05:53,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 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 17:05:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 24669 transitions. [2021-06-05 17:05:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:53,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:53,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:53,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:53,915 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1010858063, now seen corresponding path program 80 times [2021-06-05 17:05:53,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:53,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927493708] [2021-06-05 17:05:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:53,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:53,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927493708] [2021-06-05 17:05:53,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927493708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:53,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112599672] [2021-06-05 17:05:53,951 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:53,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:53,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:53,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:53,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:54,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112599672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:54,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:54,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:05:54,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789960029] [2021-06-05 17:05:54,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:54,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:54,035 INFO L87 Difference]: Start difference. First operand 6536 states and 24669 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:05:54,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:54,689 INFO L93 Difference]: Finished difference Result 13521 states and 47319 transitions. [2021-06-05 17:05:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:05:54,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 17:05:54,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:54,714 INFO L225 Difference]: With dead ends: 13521 [2021-06-05 17:05:54,714 INFO L226 Difference]: Without dead ends: 13521 [2021-06-05 17:05:54,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 398.3ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:05:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2021-06-05 17:05:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 7289. [2021-06-05 17:05:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7289 states, 7288 states have (on average 3.784714599341383) internal successors, (27583), 7288 states have internal predecessors, (27583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7289 states to 7289 states and 27583 transitions. [2021-06-05 17:05:54,898 INFO L78 Accepts]: Start accepts. Automaton has 7289 states and 27583 transitions. Word has length 28 [2021-06-05 17:05:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:54,898 INFO L482 AbstractCegarLoop]: Abstraction has 7289 states and 27583 transitions. [2021-06-05 17:05:54,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:05:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 7289 states and 27583 transitions. [2021-06-05 17:05:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:54,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:54,908 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:55,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:55,108 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:55,108 INFO L82 PathProgramCache]: Analyzing trace with hash 891821389, now seen corresponding path program 81 times [2021-06-05 17:05:55,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:55,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270372047] [2021-06-05 17:05:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:55,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:55,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270372047] [2021-06-05 17:05:55,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270372047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:55,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936812280] [2021-06-05 17:05:55,139 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:55,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:05:55,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:55,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:55,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936812280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:55,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:55,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:05:55,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732385599] [2021-06-05 17:05:55,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:05:55,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:55,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:05:55,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:05:55,220 INFO L87 Difference]: Start difference. First operand 7289 states and 27583 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 17:05:55,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:55,810 INFO L93 Difference]: Finished difference Result 13718 states and 48041 transitions. [2021-06-05 17:05:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:05:55,810 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 28 [2021-06-05 17:05:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:55,833 INFO L225 Difference]: With dead ends: 13718 [2021-06-05 17:05:55,834 INFO L226 Difference]: Without dead ends: 13718 [2021-06-05 17:05:55,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 339.1ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:05:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13718 states. [2021-06-05 17:05:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13718 to 7565. [2021-06-05 17:05:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7565 states, 7564 states have (on average 3.7618984664198836) internal successors, (28455), 7564 states have internal predecessors, (28455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:56,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 28455 transitions. [2021-06-05 17:05:56,027 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 28455 transitions. Word has length 28 [2021-06-05 17:05:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:56,027 INFO L482 AbstractCegarLoop]: Abstraction has 7565 states and 28455 transitions. [2021-06-05 17:05:56,027 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 17:05:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 28455 transitions. [2021-06-05 17:05:56,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:56,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:56,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:56,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 17:05:56,238 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:56,238 INFO L82 PathProgramCache]: Analyzing trace with hash -191201267, now seen corresponding path program 82 times [2021-06-05 17:05:56,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:56,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953063500] [2021-06-05 17:05:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:56,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:56,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953063500] [2021-06-05 17:05:56,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953063500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:56,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694984415] [2021-06-05 17:05:56,262 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:56,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:05:56,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:56,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:56,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:56,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694984415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:56,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:56,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:05:56,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211898993] [2021-06-05 17:05:56,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:05:56,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:56,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:05:56,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:05:56,338 INFO L87 Difference]: Start difference. First operand 7565 states and 28455 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 17:05:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:56,640 INFO L93 Difference]: Finished difference Result 10107 states and 36572 transitions. [2021-06-05 17:05:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:05:56,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-05 17:05:56,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:56,656 INFO L225 Difference]: With dead ends: 10107 [2021-06-05 17:05:56,657 INFO L226 Difference]: Without dead ends: 10077 [2021-06-05 17:05:56,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:05:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10077 states. [2021-06-05 17:05:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10077 to 8418. [2021-06-05 17:05:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8417 states have (on average 3.7842461684685755) internal successors, (31852), 8417 states have internal predecessors, (31852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:56,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 31852 transitions. [2021-06-05 17:05:56,794 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 31852 transitions. Word has length 28 [2021-06-05 17:05:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:56,794 INFO L482 AbstractCegarLoop]: Abstraction has 8418 states and 31852 transitions. [2021-06-05 17:05:56,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 17:05:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 31852 transitions. [2021-06-05 17:05:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:56,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:56,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:57,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 17:05:57,006 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:57,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1279876851, now seen corresponding path program 83 times [2021-06-05 17:05:57,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:57,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354560719] [2021-06-05 17:05:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:57,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:57,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354560719] [2021-06-05 17:05:57,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354560719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:57,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763470758] [2021-06-05 17:05:57,047 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:57,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:05:57,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:57,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763470758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:57,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:57,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:05:57,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549732149] [2021-06-05 17:05:57,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:05:57,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:57,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:05:57,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:05:57,125 INFO L87 Difference]: Start difference. First operand 8418 states and 31852 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 17:05:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:57,433 INFO L93 Difference]: Finished difference Result 10717 states and 38597 transitions. [2021-06-05 17:05:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:05:57,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 28 [2021-06-05 17:05:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:57,450 INFO L225 Difference]: With dead ends: 10717 [2021-06-05 17:05:57,450 INFO L226 Difference]: Without dead ends: 10717 [2021-06-05 17:05:57,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:05:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10717 states. [2021-06-05 17:05:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10717 to 8458. [2021-06-05 17:05:57,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8458 states, 8457 states have (on average 3.780418588151827) internal successors, (31971), 8457 states have internal predecessors, (31971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8458 states to 8458 states and 31971 transitions. [2021-06-05 17:05:57,619 INFO L78 Accepts]: Start accepts. Automaton has 8458 states and 31971 transitions. Word has length 28 [2021-06-05 17:05:57,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:57,619 INFO L482 AbstractCegarLoop]: Abstraction has 8458 states and 31971 transitions. [2021-06-05 17:05:57,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 17:05:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 8458 states and 31971 transitions. [2021-06-05 17:05:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:57,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:57,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:57,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:57,831 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:57,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:57,831 INFO L82 PathProgramCache]: Analyzing trace with hash 847000247, now seen corresponding path program 84 times [2021-06-05 17:05:57,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:57,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592731671] [2021-06-05 17:05:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:57,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:57,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592731671] [2021-06-05 17:05:57,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592731671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:57,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978410091] [2021-06-05 17:05:57,861 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:57,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:05:57,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:57,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:57,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:05:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978410091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:57,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:57,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 17:05:57,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140808797] [2021-06-05 17:05:57,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:05:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:05:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:05:57,935 INFO L87 Difference]: Start difference. First operand 8458 states and 31971 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 17:05:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:58,454 INFO L93 Difference]: Finished difference Result 14431 states and 51407 transitions. [2021-06-05 17:05:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:05:58,454 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 28 [2021-06-05 17:05:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:58,479 INFO L225 Difference]: With dead ends: 14431 [2021-06-05 17:05:58,479 INFO L226 Difference]: Without dead ends: 14427 [2021-06-05 17:05:58,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:05:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2021-06-05 17:05:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 8356. [2021-06-05 17:05:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8356 states, 8355 states have (on average 3.784320766008378) internal successors, (31618), 8355 states have internal predecessors, (31618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8356 states to 8356 states and 31618 transitions. [2021-06-05 17:05:58,657 INFO L78 Accepts]: Start accepts. Automaton has 8356 states and 31618 transitions. Word has length 28 [2021-06-05 17:05:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:58,657 INFO L482 AbstractCegarLoop]: Abstraction has 8356 states and 31618 transitions. [2021-06-05 17:05:58,657 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 17:05:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 8356 states and 31618 transitions. [2021-06-05 17:05:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:58,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:58,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:05:58,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 17:05:58,869 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 795274241, now seen corresponding path program 85 times [2021-06-05 17:05:58,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:58,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985621676] [2021-06-05 17:05:58,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:58,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:58,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985621676] [2021-06-05 17:05:58,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985621676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:58,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019899283] [2021-06-05 17:05:58,900 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:58,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:05:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:58,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019899283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:58,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:58,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:05:58,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790664979] [2021-06-05 17:05:58,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:05:58,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:58,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:05:58,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:05:58,979 INFO L87 Difference]: Start difference. First operand 8356 states and 31618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:05:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:05:59,380 INFO L93 Difference]: Finished difference Result 10928 states and 39376 transitions. [2021-06-05 17:05:59,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:05:59,381 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:05:59,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:05:59,398 INFO L225 Difference]: With dead ends: 10928 [2021-06-05 17:05:59,398 INFO L226 Difference]: Without dead ends: 10928 [2021-06-05 17:05:59,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:05:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10928 states. [2021-06-05 17:05:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10928 to 8277. [2021-06-05 17:05:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.779603673272112) internal successors, (31280), 8276 states have internal predecessors, (31280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:05:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31280 transitions. [2021-06-05 17:05:59,537 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31280 transitions. Word has length 28 [2021-06-05 17:05:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:05:59,537 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31280 transitions. [2021-06-05 17:05:59,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:05:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31280 transitions. [2021-06-05 17:05:59,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:05:59,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:05:59,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:05:59,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:59,752 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:05:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:05:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1444336905, now seen corresponding path program 86 times [2021-06-05 17:05:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:05:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248831625] [2021-06-05 17:05:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:05:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:05:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:59,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:05:59,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248831625] [2021-06-05 17:05:59,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248831625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:59,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368397077] [2021-06-05 17:05:59,791 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:05:59,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:05:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:05:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:05:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:05:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:05:59,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368397077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:05:59,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:05:59,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:05:59,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433516853] [2021-06-05 17:05:59,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:05:59,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:05:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:05:59,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:05:59,865 INFO L87 Difference]: Start difference. First operand 8277 states and 31280 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:06:00,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:00,485 INFO L93 Difference]: Finished difference Result 14287 states and 50815 transitions. [2021-06-05 17:06:00,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:06:00,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 17:06:00,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:00,511 INFO L225 Difference]: With dead ends: 14287 [2021-06-05 17:06:00,511 INFO L226 Difference]: Without dead ends: 14275 [2021-06-05 17:06:00,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:06:00,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14275 states. [2021-06-05 17:06:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14275 to 8277. [2021-06-05 17:06:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8277 states, 8276 states have (on average 3.7791203479942) internal successors, (31276), 8276 states have internal predecessors, (31276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8277 states to 8277 states and 31276 transitions. [2021-06-05 17:06:00,735 INFO L78 Accepts]: Start accepts. Automaton has 8277 states and 31276 transitions. Word has length 28 [2021-06-05 17:06:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:00,735 INFO L482 AbstractCegarLoop]: Abstraction has 8277 states and 31276 transitions. [2021-06-05 17:06:00,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:06:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8277 states and 31276 transitions. [2021-06-05 17:06:00,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:00,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:00,748 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:00,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 17:06:00,948 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:00,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:00,949 INFO L82 PathProgramCache]: Analyzing trace with hash -323944011, now seen corresponding path program 87 times [2021-06-05 17:06:00,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:00,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138765851] [2021-06-05 17:06:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:00,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138765851] [2021-06-05 17:06:00,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138765851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075681806] [2021-06-05 17:06:00,988 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:01,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:06:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:01,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:01,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075681806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:01,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:01,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:06:01,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952968247] [2021-06-05 17:06:01,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:06:01,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:01,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:06:01,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:06:01,085 INFO L87 Difference]: Start difference. First operand 8277 states and 31276 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:06:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:02,120 INFO L93 Difference]: Finished difference Result 21967 states and 76854 transitions. [2021-06-05 17:06:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 17:06:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:06:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:02,159 INFO L225 Difference]: With dead ends: 21967 [2021-06-05 17:06:02,159 INFO L226 Difference]: Without dead ends: 21967 [2021-06-05 17:06:02,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 637.6ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 17:06:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21967 states. [2021-06-05 17:06:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21967 to 11428. [2021-06-05 17:06:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11428 states, 11427 states have (on average 3.8238382777631923) internal successors, (43695), 11427 states have internal predecessors, (43695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11428 states to 11428 states and 43695 transitions. [2021-06-05 17:06:02,516 INFO L78 Accepts]: Start accepts. Automaton has 11428 states and 43695 transitions. Word has length 28 [2021-06-05 17:06:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:02,516 INFO L482 AbstractCegarLoop]: Abstraction has 11428 states and 43695 transitions. [2021-06-05 17:06:02,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:06:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 11428 states and 43695 transitions. [2021-06-05 17:06:02,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:02,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:02,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:02,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 17:06:02,732 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:02,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:02,732 INFO L82 PathProgramCache]: Analyzing trace with hash -242567923, now seen corresponding path program 88 times [2021-06-05 17:06:02,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:02,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216842543] [2021-06-05 17:06:02,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:02,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:02,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216842543] [2021-06-05 17:06:02,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216842543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:02,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459360631] [2021-06-05 17:06:02,771 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:02,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:02,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:02,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459360631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:02,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:02,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:06:02,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644446516] [2021-06-05 17:06:02,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:06:02,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:02,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:06:02,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:06:02,854 INFO L87 Difference]: Start difference. First operand 11428 states and 43695 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:06:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:03,764 INFO L93 Difference]: Finished difference Result 21082 states and 74573 transitions. [2021-06-05 17:06:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:06:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:06:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:03,802 INFO L225 Difference]: With dead ends: 21082 [2021-06-05 17:06:03,802 INFO L226 Difference]: Without dead ends: 21070 [2021-06-05 17:06:03,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 546.4ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:06:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21070 states. [2021-06-05 17:06:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21070 to 11250. [2021-06-05 17:06:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11250 states, 11249 states have (on average 3.8307405102675793) internal successors, (43092), 11249 states have internal predecessors, (43092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11250 states to 11250 states and 43092 transitions. [2021-06-05 17:06:04,187 INFO L78 Accepts]: Start accepts. Automaton has 11250 states and 43092 transitions. Word has length 28 [2021-06-05 17:06:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:04,187 INFO L482 AbstractCegarLoop]: Abstraction has 11250 states and 43092 transitions. [2021-06-05 17:06:04,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:06:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 11250 states and 43092 transitions. [2021-06-05 17:06:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:04,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:04,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:04,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:04,402 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:04,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:04,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1757659895, now seen corresponding path program 89 times [2021-06-05 17:06:04,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:04,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787565302] [2021-06-05 17:06:04,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:04,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:04,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:04,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787565302] [2021-06-05 17:06:04,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787565302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:04,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334952230] [2021-06-05 17:06:04,509 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:04,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:06:04,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:04,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334952230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:04,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:04,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:06:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683063133] [2021-06-05 17:06:04,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:06:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:06:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:06:04,592 INFO L87 Difference]: Start difference. First operand 11250 states and 43092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:06:05,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:05,497 INFO L93 Difference]: Finished difference Result 20939 states and 73944 transitions. [2021-06-05 17:06:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:06:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:06:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:05,535 INFO L225 Difference]: With dead ends: 20939 [2021-06-05 17:06:05,535 INFO L226 Difference]: Without dead ends: 20903 [2021-06-05 17:06:05,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:06:05,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20903 states. [2021-06-05 17:06:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20903 to 11290. [2021-06-05 17:06:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11290 states, 11289 states have (on average 3.8302772610505804) internal successors, (43240), 11289 states have internal predecessors, (43240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 43240 transitions. [2021-06-05 17:06:05,824 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 43240 transitions. Word has length 28 [2021-06-05 17:06:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:05,824 INFO L482 AbstractCegarLoop]: Abstraction has 11290 states and 43240 transitions. [2021-06-05 17:06:05,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:06:05,824 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 43240 transitions. [2021-06-05 17:06:05,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:05,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:05,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:06,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:06,040 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:06,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:06,040 INFO L82 PathProgramCache]: Analyzing trace with hash -160533179, now seen corresponding path program 90 times [2021-06-05 17:06:06,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:06,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641136853] [2021-06-05 17:06:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:06,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:06,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641136853] [2021-06-05 17:06:06,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641136853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:06,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845508027] [2021-06-05 17:06:06,076 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:06,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:06:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:06,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845508027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:06,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:06,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:06:06,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633392272] [2021-06-05 17:06:06,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:06,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:06,184 INFO L87 Difference]: Start difference. First operand 11290 states and 43240 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:07,580 INFO L93 Difference]: Finished difference Result 20726 states and 73402 transitions. [2021-06-05 17:06:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 17:06:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:06:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:07,622 INFO L225 Difference]: With dead ends: 20726 [2021-06-05 17:06:07,622 INFO L226 Difference]: Without dead ends: 20726 [2021-06-05 17:06:07,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 890.4ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:06:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20726 states. [2021-06-05 17:06:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20726 to 11482. [2021-06-05 17:06:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11482 states, 11481 states have (on average 3.8212699242226287) internal successors, (43872), 11481 states have internal predecessors, (43872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11482 states to 11482 states and 43872 transitions. [2021-06-05 17:06:07,926 INFO L78 Accepts]: Start accepts. Automaton has 11482 states and 43872 transitions. Word has length 28 [2021-06-05 17:06:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:07,926 INFO L482 AbstractCegarLoop]: Abstraction has 11482 states and 43872 transitions. [2021-06-05 17:06:07,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 11482 states and 43872 transitions. [2021-06-05 17:06:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:07,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:07,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:08,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 17:06:08,142 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:08,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:08,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1482505975, now seen corresponding path program 91 times [2021-06-05 17:06:08,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:08,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771454741] [2021-06-05 17:06:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:08,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:08,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771454741] [2021-06-05 17:06:08,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771454741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:08,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903323528] [2021-06-05 17:06:08,178 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:08,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:08,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903323528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:08,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:08,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:06:08,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197245926] [2021-06-05 17:06:08,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:08,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:08,286 INFO L87 Difference]: Start difference. First operand 11482 states and 43872 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:09,423 INFO L93 Difference]: Finished difference Result 20187 states and 71933 transitions. [2021-06-05 17:06:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:06:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:06:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:09,461 INFO L225 Difference]: With dead ends: 20187 [2021-06-05 17:06:09,461 INFO L226 Difference]: Without dead ends: 20175 [2021-06-05 17:06:09,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 668.5ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:06:09,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20175 states. [2021-06-05 17:06:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20175 to 11366. [2021-06-05 17:06:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.825780906291245) internal successors, (43480), 11365 states have internal predecessors, (43480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 43480 transitions. [2021-06-05 17:06:09,728 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 43480 transitions. Word has length 28 [2021-06-05 17:06:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:09,728 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 43480 transitions. [2021-06-05 17:06:09,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 43480 transitions. [2021-06-05 17:06:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:09,744 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:09,744 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:09,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 17:06:09,944 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:09,944 INFO L82 PathProgramCache]: Analyzing trace with hash 215048797, now seen corresponding path program 92 times [2021-06-05 17:06:09,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:09,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353792221] [2021-06-05 17:06:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:09,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:09,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353792221] [2021-06-05 17:06:09,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353792221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:09,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175365083] [2021-06-05 17:06:09,981 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:10,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:10,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:10,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:10,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:10,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175365083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:10,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:10,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:06:10,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314034419] [2021-06-05 17:06:10,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:06:10,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:06:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:06:10,072 INFO L87 Difference]: Start difference. First operand 11366 states and 43480 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:06:10,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:10,972 INFO L93 Difference]: Finished difference Result 19429 states and 69858 transitions. [2021-06-05 17:06:10,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:06:10,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 17:06:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:11,006 INFO L225 Difference]: With dead ends: 19429 [2021-06-05 17:06:11,007 INFO L226 Difference]: Without dead ends: 19393 [2021-06-05 17:06:11,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:06:11,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19393 states. [2021-06-05 17:06:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19393 to 11390. [2021-06-05 17:06:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11390 states, 11389 states have (on average 3.8247431732373345) internal successors, (43560), 11389 states have internal predecessors, (43560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11390 states to 11390 states and 43560 transitions. [2021-06-05 17:06:11,253 INFO L78 Accepts]: Start accepts. Automaton has 11390 states and 43560 transitions. Word has length 28 [2021-06-05 17:06:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:11,253 INFO L482 AbstractCegarLoop]: Abstraction has 11390 states and 43560 transitions. [2021-06-05 17:06:11,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:06:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 11390 states and 43560 transitions. [2021-06-05 17:06:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:11,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:11,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:11,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 17:06:11,469 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1691162673, now seen corresponding path program 93 times [2021-06-05 17:06:11,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:11,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813070026] [2021-06-05 17:06:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:11,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:11,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813070026] [2021-06-05 17:06:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813070026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:11,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528191928] [2021-06-05 17:06:11,501 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:11,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:11,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:11,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:11,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:11,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528191928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:11,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:11,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:06:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143986709] [2021-06-05 17:06:11,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:11,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:11,685 INFO L87 Difference]: Start difference. First operand 11390 states and 43560 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:12,840 INFO L93 Difference]: Finished difference Result 28523 states and 101952 transitions. [2021-06-05 17:06:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:06:12,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 17:06:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:12,897 INFO L225 Difference]: With dead ends: 28523 [2021-06-05 17:06:12,897 INFO L226 Difference]: Without dead ends: 28523 [2021-06-05 17:06:12,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 17:06:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28523 states. [2021-06-05 17:06:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28523 to 11724. [2021-06-05 17:06:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11724 states, 11723 states have (on average 3.850294293269641) internal successors, (45137), 11723 states have internal predecessors, (45137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11724 states to 11724 states and 45137 transitions. [2021-06-05 17:06:13,230 INFO L78 Accepts]: Start accepts. Automaton has 11724 states and 45137 transitions. Word has length 28 [2021-06-05 17:06:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:13,230 INFO L482 AbstractCegarLoop]: Abstraction has 11724 states and 45137 transitions. [2021-06-05 17:06:13,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:13,231 INFO L276 IsEmpty]: Start isEmpty. Operand 11724 states and 45137 transitions. [2021-06-05 17:06:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:13,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:13,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:13,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-05 17:06:13,447 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:13,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:13,447 INFO L82 PathProgramCache]: Analyzing trace with hash -2036852543, now seen corresponding path program 94 times [2021-06-05 17:06:13,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:13,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962137509] [2021-06-05 17:06:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:13,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:13,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962137509] [2021-06-05 17:06:13,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962137509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:13,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731345608] [2021-06-05 17:06:13,478 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:13,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:13,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:13,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:13,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:13,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731345608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:13,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:13,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:06:13,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445164070] [2021-06-05 17:06:13,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:13,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:13,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:13,591 INFO L87 Difference]: Start difference. First operand 11724 states and 45137 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:14,707 INFO L93 Difference]: Finished difference Result 27968 states and 100678 transitions. [2021-06-05 17:06:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 17:06:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 17:06:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:14,763 INFO L225 Difference]: With dead ends: 27968 [2021-06-05 17:06:14,763 INFO L226 Difference]: Without dead ends: 27968 [2021-06-05 17:06:14,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 17:06:14,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27968 states. [2021-06-05 17:06:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27968 to 11614. [2021-06-05 17:06:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11614 states, 11613 states have (on average 3.837595797812796) internal successors, (44566), 11613 states have internal predecessors, (44566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11614 states to 11614 states and 44566 transitions. [2021-06-05 17:06:15,098 INFO L78 Accepts]: Start accepts. Automaton has 11614 states and 44566 transitions. Word has length 28 [2021-06-05 17:06:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:15,098 INFO L482 AbstractCegarLoop]: Abstraction has 11614 states and 44566 transitions. [2021-06-05 17:06:15,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 11614 states and 44566 transitions. [2021-06-05 17:06:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:15,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:15,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:15,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 17:06:15,314 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:15,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:15,314 INFO L82 PathProgramCache]: Analyzing trace with hash 197254951, now seen corresponding path program 95 times [2021-06-05 17:06:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:15,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345701320] [2021-06-05 17:06:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:15,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345701320] [2021-06-05 17:06:15,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345701320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:15,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814137444] [2021-06-05 17:06:15,352 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:15,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:06:15,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:15,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:15,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:15,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814137444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:15,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:15,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:06:15,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449273576] [2021-06-05 17:06:15,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:06:15,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:15,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:06:15,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:06:15,456 INFO L87 Difference]: Start difference. First operand 11614 states and 44566 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 17:06:16,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:16,175 INFO L93 Difference]: Finished difference Result 22124 states and 79964 transitions. [2021-06-05 17:06:16,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:06:16,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 28 [2021-06-05 17:06:16,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:16,215 INFO L225 Difference]: With dead ends: 22124 [2021-06-05 17:06:16,215 INFO L226 Difference]: Without dead ends: 22124 [2021-06-05 17:06:16,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 407.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:06:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22124 states. [2021-06-05 17:06:16,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22124 to 11623. [2021-06-05 17:06:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11623 states, 11622 states have (on average 3.8366029943211153) internal successors, (44589), 11622 states have internal predecessors, (44589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11623 states to 11623 states and 44589 transitions. [2021-06-05 17:06:16,555 INFO L78 Accepts]: Start accepts. Automaton has 11623 states and 44589 transitions. Word has length 28 [2021-06-05 17:06:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:16,555 INFO L482 AbstractCegarLoop]: Abstraction has 11623 states and 44589 transitions. [2021-06-05 17:06:16,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 17:06:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 11623 states and 44589 transitions. [2021-06-05 17:06:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:16,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:16,573 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:16,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:16,774 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:16,774 INFO L82 PathProgramCache]: Analyzing trace with hash -477466927, now seen corresponding path program 96 times [2021-06-05 17:06:16,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:16,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348219389] [2021-06-05 17:06:16,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:16,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348219389] [2021-06-05 17:06:16,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348219389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103490125] [2021-06-05 17:06:16,808 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:16,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:06:16,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:16,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:16,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:16,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103490125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:16,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:16,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:06:16,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715030799] [2021-06-05 17:06:16,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:06:16,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:16,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:06:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:06:16,922 INFO L87 Difference]: Start difference. First operand 11623 states and 44589 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:06:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:17,644 INFO L93 Difference]: Finished difference Result 20483 states and 74724 transitions. [2021-06-05 17:06:17,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:06:17,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 17:06:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:17,682 INFO L225 Difference]: With dead ends: 20483 [2021-06-05 17:06:17,682 INFO L226 Difference]: Without dead ends: 20483 [2021-06-05 17:06:17,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:06:17,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20483 states. [2021-06-05 17:06:17,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20483 to 11635. [2021-06-05 17:06:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11635 states, 11634 states have (on average 3.8359119821213685) internal successors, (44627), 11634 states have internal predecessors, (44627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11635 states to 11635 states and 44627 transitions. [2021-06-05 17:06:17,955 INFO L78 Accepts]: Start accepts. Automaton has 11635 states and 44627 transitions. Word has length 28 [2021-06-05 17:06:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:17,955 INFO L482 AbstractCegarLoop]: Abstraction has 11635 states and 44627 transitions. [2021-06-05 17:06:17,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:06:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 11635 states and 44627 transitions. [2021-06-05 17:06:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:17,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:17,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:18,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 17:06:18,172 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:18,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1175893249, now seen corresponding path program 97 times [2021-06-05 17:06:18,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:18,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908784241] [2021-06-05 17:06:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:18,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:18,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908784241] [2021-06-05 17:06:18,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908784241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:18,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107216329] [2021-06-05 17:06:18,208 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:18,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107216329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:18,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:18,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:06:18,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61752550] [2021-06-05 17:06:18,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:18,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:18,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:18,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:18,322 INFO L87 Difference]: Start difference. First operand 11635 states and 44627 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:19,320 INFO L93 Difference]: Finished difference Result 21266 states and 76961 transitions. [2021-06-05 17:06:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 17:06:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:06:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:19,360 INFO L225 Difference]: With dead ends: 21266 [2021-06-05 17:06:19,361 INFO L226 Difference]: Without dead ends: 21266 [2021-06-05 17:06:19,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 17:06:19,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21266 states. [2021-06-05 17:06:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21266 to 11743. [2021-06-05 17:06:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11743 states, 11742 states have (on average 3.8290751149718956) internal successors, (44961), 11742 states have internal predecessors, (44961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11743 states to 11743 states and 44961 transitions. [2021-06-05 17:06:19,686 INFO L78 Accepts]: Start accepts. Automaton has 11743 states and 44961 transitions. Word has length 28 [2021-06-05 17:06:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:19,686 INFO L482 AbstractCegarLoop]: Abstraction has 11743 states and 44961 transitions. [2021-06-05 17:06:19,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 11743 states and 44961 transitions. [2021-06-05 17:06:19,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:19,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:19,702 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:19,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:19,902 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:19,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1476034893, now seen corresponding path program 98 times [2021-06-05 17:06:19,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:19,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538638366] [2021-06-05 17:06:19,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:19,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538638366] [2021-06-05 17:06:19,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538638366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:19,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371449494] [2021-06-05 17:06:19,933 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:19,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:19,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:19,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:19,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:20,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371449494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:20,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:20,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:06:20,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581929091] [2021-06-05 17:06:20,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:20,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:20,051 INFO L87 Difference]: Start difference. First operand 11743 states and 44961 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:20,889 INFO L93 Difference]: Finished difference Result 20647 states and 75257 transitions. [2021-06-05 17:06:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:06:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:06:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:20,927 INFO L225 Difference]: With dead ends: 20647 [2021-06-05 17:06:20,927 INFO L226 Difference]: Without dead ends: 20643 [2021-06-05 17:06:20,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:06:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20643 states. [2021-06-05 17:06:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20643 to 11669. [2021-06-05 17:06:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11669 states, 11668 states have (on average 3.8328762427151184) internal successors, (44722), 11668 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11669 states to 11669 states and 44722 transitions. [2021-06-05 17:06:21,197 INFO L78 Accepts]: Start accepts. Automaton has 11669 states and 44722 transitions. Word has length 28 [2021-06-05 17:06:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:21,197 INFO L482 AbstractCegarLoop]: Abstraction has 11669 states and 44722 transitions. [2021-06-05 17:06:21,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 11669 states and 44722 transitions. [2021-06-05 17:06:21,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:21,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:21,213 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:21,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:21,413 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:21,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:21,414 INFO L82 PathProgramCache]: Analyzing trace with hash 729404223, now seen corresponding path program 99 times [2021-06-05 17:06:21,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:21,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776541751] [2021-06-05 17:06:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:21,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776541751] [2021-06-05 17:06:21,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776541751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:21,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938948245] [2021-06-05 17:06:21,449 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:21,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 17:06:21,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:21,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938948245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:21,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:21,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:06:21,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402209426] [2021-06-05 17:06:21,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:21,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:21,560 INFO L87 Difference]: Start difference. First operand 11669 states and 44722 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:06:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:22,491 INFO L93 Difference]: Finished difference Result 19952 states and 72022 transitions. [2021-06-05 17:06:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 17:06:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 17:06:22,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:22,589 INFO L225 Difference]: With dead ends: 19952 [2021-06-05 17:06:22,589 INFO L226 Difference]: Without dead ends: 19952 [2021-06-05 17:06:22,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:06:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19952 states. [2021-06-05 17:06:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19952 to 11896. [2021-06-05 17:06:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11896 states, 11895 states have (on average 3.8352248844052124) internal successors, (45620), 11895 states have internal predecessors, (45620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11896 states to 11896 states and 45620 transitions. [2021-06-05 17:06:22,841 INFO L78 Accepts]: Start accepts. Automaton has 11896 states and 45620 transitions. Word has length 28 [2021-06-05 17:06:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:22,841 INFO L482 AbstractCegarLoop]: Abstraction has 11896 states and 45620 transitions. [2021-06-05 17:06:22,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:06:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11896 states and 45620 transitions. [2021-06-05 17:06:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:22,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:22,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:23,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-05 17:06:23,058 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1909723903, now seen corresponding path program 100 times [2021-06-05 17:06:23,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:23,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558050751] [2021-06-05 17:06:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:23,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:23,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558050751] [2021-06-05 17:06:23,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558050751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903404191] [2021-06-05 17:06:23,095 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:23,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:23,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903404191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:23,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:23,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:06:23,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299517754] [2021-06-05 17:06:23,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:23,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:23,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:23,195 INFO L87 Difference]: Start difference. First operand 11896 states and 45620 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:06:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:24,036 INFO L93 Difference]: Finished difference Result 19483 states and 70731 transitions. [2021-06-05 17:06:24,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:06:24,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 17:06:24,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:24,073 INFO L225 Difference]: With dead ends: 19483 [2021-06-05 17:06:24,073 INFO L226 Difference]: Without dead ends: 19471 [2021-06-05 17:06:24,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 497.5ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:06:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19471 states. [2021-06-05 17:06:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19471 to 11998. [2021-06-05 17:06:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11998 states, 11997 states have (on average 3.8295407185129617) internal successors, (45943), 11997 states have internal predecessors, (45943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:24,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11998 states to 11998 states and 45943 transitions. [2021-06-05 17:06:24,327 INFO L78 Accepts]: Start accepts. Automaton has 11998 states and 45943 transitions. Word has length 28 [2021-06-05 17:06:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:24,327 INFO L482 AbstractCegarLoop]: Abstraction has 11998 states and 45943 transitions. [2021-06-05 17:06:24,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:06:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11998 states and 45943 transitions. [2021-06-05 17:06:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:24,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:24,343 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:24,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:24,544 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:24,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1714650925, now seen corresponding path program 77 times [2021-06-05 17:06:24,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:24,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365104143] [2021-06-05 17:06:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:24,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:24,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365104143] [2021-06-05 17:06:24,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365104143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:24,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803872975] [2021-06-05 17:06:24,588 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:24,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:06:24,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:24,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:24,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:24,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803872975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:24,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:24,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:06:24,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230747239] [2021-06-05 17:06:24,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:24,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:24,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:24,673 INFO L87 Difference]: Start difference. First operand 11998 states and 45943 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:06:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:25,106 INFO L93 Difference]: Finished difference Result 16918 states and 62875 transitions. [2021-06-05 17:06:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:06:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 17:06:25,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:25,139 INFO L225 Difference]: With dead ends: 16918 [2021-06-05 17:06:25,139 INFO L226 Difference]: Without dead ends: 16918 [2021-06-05 17:06:25,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:06:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16918 states. [2021-06-05 17:06:25,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16918 to 12070. [2021-06-05 17:06:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12070 states, 12069 states have (on average 3.824923357361836) internal successors, (46163), 12069 states have internal predecessors, (46163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12070 states to 12070 states and 46163 transitions. [2021-06-05 17:06:25,421 INFO L78 Accepts]: Start accepts. Automaton has 12070 states and 46163 transitions. Word has length 28 [2021-06-05 17:06:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:25,421 INFO L482 AbstractCegarLoop]: Abstraction has 12070 states and 46163 transitions. [2021-06-05 17:06:25,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:06:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 12070 states and 46163 transitions. [2021-06-05 17:06:25,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:25,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:25,438 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:25,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-05 17:06:25,638 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -869150583, now seen corresponding path program 78 times [2021-06-05 17:06:25,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:25,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415751041] [2021-06-05 17:06:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:25,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:25,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415751041] [2021-06-05 17:06:25,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415751041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:25,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271077856] [2021-06-05 17:06:25,668 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:25,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:25,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:25,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:25,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:25,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271077856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:25,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:25,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:06:25,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561740655] [2021-06-05 17:06:25,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:25,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:25,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:25,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:25,778 INFO L87 Difference]: Start difference. First operand 12070 states and 46163 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 17:06:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:26,156 INFO L93 Difference]: Finished difference Result 15210 states and 56302 transitions. [2021-06-05 17:06:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:06:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-05 17:06:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:26,184 INFO L225 Difference]: With dead ends: 15210 [2021-06-05 17:06:26,184 INFO L226 Difference]: Without dead ends: 15169 [2021-06-05 17:06:26,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:06:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15169 states. [2021-06-05 17:06:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15169 to 11722. [2021-06-05 17:06:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11722 states, 11721 states have (on average 3.8192133776981487) internal successors, (44765), 11721 states have internal predecessors, (44765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11722 states to 11722 states and 44765 transitions. [2021-06-05 17:06:26,389 INFO L78 Accepts]: Start accepts. Automaton has 11722 states and 44765 transitions. Word has length 28 [2021-06-05 17:06:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:26,389 INFO L482 AbstractCegarLoop]: Abstraction has 11722 states and 44765 transitions. [2021-06-05 17:06:26,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 17:06:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 11722 states and 44765 transitions. [2021-06-05 17:06:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:26,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:26,405 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:26,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 17:06:26,606 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:26,606 INFO L82 PathProgramCache]: Analyzing trace with hash -55855667, now seen corresponding path program 79 times [2021-06-05 17:06:26,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:26,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740845330] [2021-06-05 17:06:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:26,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740845330] [2021-06-05 17:06:26,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740845330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:26,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109366853] [2021-06-05 17:06:26,636 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:26,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:26,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109366853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:26,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:26,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:06:26,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447224700] [2021-06-05 17:06:26,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:06:26,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:26,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:06:26,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:06:26,716 INFO L87 Difference]: Start difference. First operand 11722 states and 44765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:06:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:27,183 INFO L93 Difference]: Finished difference Result 17574 states and 64350 transitions. [2021-06-05 17:06:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:06:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:06:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:27,218 INFO L225 Difference]: With dead ends: 17574 [2021-06-05 17:06:27,218 INFO L226 Difference]: Without dead ends: 17574 [2021-06-05 17:06:27,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:06:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17574 states. [2021-06-05 17:06:27,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17574 to 12034. [2021-06-05 17:06:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12034 states, 12033 states have (on average 3.802626111526635) internal successors, (45757), 12033 states have internal predecessors, (45757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12034 states to 12034 states and 45757 transitions. [2021-06-05 17:06:27,470 INFO L78 Accepts]: Start accepts. Automaton has 12034 states and 45757 transitions. Word has length 28 [2021-06-05 17:06:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:27,470 INFO L482 AbstractCegarLoop]: Abstraction has 12034 states and 45757 transitions. [2021-06-05 17:06:27,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:06:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 12034 states and 45757 transitions. [2021-06-05 17:06:27,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:27,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:27,487 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 17:06:27,688 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:27,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:27,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1138878323, now seen corresponding path program 80 times [2021-06-05 17:06:27,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:27,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639877469] [2021-06-05 17:06:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:27,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639877469] [2021-06-05 17:06:27,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639877469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:27,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446847355] [2021-06-05 17:06:27,717 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:27,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:27,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:27,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:27,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446847355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:27,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:27,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 17:06:27,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050554991] [2021-06-05 17:06:27,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:27,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:27,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:27,823 INFO L87 Difference]: Start difference. First operand 12034 states and 45757 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 17:06:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:28,309 INFO L93 Difference]: Finished difference Result 16784 states and 62443 transitions. [2021-06-05 17:06:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:06:28,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 28 [2021-06-05 17:06:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:28,344 INFO L225 Difference]: With dead ends: 16784 [2021-06-05 17:06:28,344 INFO L226 Difference]: Without dead ends: 16774 [2021-06-05 17:06:28,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:06:28,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16774 states. [2021-06-05 17:06:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16774 to 14052. [2021-06-05 17:06:28,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14052 states, 14051 states have (on average 3.8370222759945913) internal successors, (53914), 14051 states have internal predecessors, (53914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14052 states to 14052 states and 53914 transitions. [2021-06-05 17:06:28,677 INFO L78 Accepts]: Start accepts. Automaton has 14052 states and 53914 transitions. Word has length 28 [2021-06-05 17:06:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:28,677 INFO L482 AbstractCegarLoop]: Abstraction has 14052 states and 53914 transitions. [2021-06-05 17:06:28,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 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 17:06:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 14052 states and 53914 transitions. [2021-06-05 17:06:28,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:28,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:28,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:28,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 17:06:28,900 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:28,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:28,900 INFO L82 PathProgramCache]: Analyzing trace with hash -100676809, now seen corresponding path program 81 times [2021-06-05 17:06:28,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:28,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931368028] [2021-06-05 17:06:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:28,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:28,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931368028] [2021-06-05 17:06:28,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931368028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:28,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018927220] [2021-06-05 17:06:28,934 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:28,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:06:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:29,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018927220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:29,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:29,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:06:29,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413663001] [2021-06-05 17:06:29,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:06:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:06:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:06:29,027 INFO L87 Difference]: Start difference. First operand 14052 states and 53914 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:06:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:29,448 INFO L93 Difference]: Finished difference Result 19306 states and 72104 transitions. [2021-06-05 17:06:29,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:06:29,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:06:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:29,486 INFO L225 Difference]: With dead ends: 19306 [2021-06-05 17:06:29,487 INFO L226 Difference]: Without dead ends: 19298 [2021-06-05 17:06:29,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:06:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19298 states. [2021-06-05 17:06:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19298 to 13972. [2021-06-05 17:06:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13972 states, 13971 states have (on average 3.8398110371483787) internal successors, (53646), 13971 states have internal predecessors, (53646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13972 states to 13972 states and 53646 transitions. [2021-06-05 17:06:29,766 INFO L78 Accepts]: Start accepts. Automaton has 13972 states and 53646 transitions. Word has length 28 [2021-06-05 17:06:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:29,766 INFO L482 AbstractCegarLoop]: Abstraction has 13972 states and 53646 transitions. [2021-06-05 17:06:29,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:06:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 13972 states and 53646 transitions. [2021-06-05 17:06:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:29,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:29,786 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:29,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:29,987 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:29,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:29,987 INFO L82 PathProgramCache]: Analyzing trace with hash 496659849, now seen corresponding path program 82 times [2021-06-05 17:06:29,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:29,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118205952] [2021-06-05 17:06:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:30,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:30,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118205952] [2021-06-05 17:06:30,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118205952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:30,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321710535] [2021-06-05 17:06:30,023 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:30,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:30,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:30,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:30,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321710535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:30,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:30,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:06:30,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456745443] [2021-06-05 17:06:30,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:30,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:30,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:30,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:30,098 INFO L87 Difference]: Start difference. First operand 13972 states and 53646 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:06:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:30,496 INFO L93 Difference]: Finished difference Result 19186 states and 71752 transitions. [2021-06-05 17:06:30,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:06:30,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 17:06:30,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:30,532 INFO L225 Difference]: With dead ends: 19186 [2021-06-05 17:06:30,532 INFO L226 Difference]: Without dead ends: 19174 [2021-06-05 17:06:30,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:06:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19174 states. [2021-06-05 17:06:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19174 to 13938. [2021-06-05 17:06:30,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13938 states, 13937 states have (on average 3.841788046207936) internal successors, (53543), 13937 states have internal predecessors, (53543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13938 states to 13938 states and 53543 transitions. [2021-06-05 17:06:30,809 INFO L78 Accepts]: Start accepts. Automaton has 13938 states and 53543 transitions. Word has length 28 [2021-06-05 17:06:30,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:30,809 INFO L482 AbstractCegarLoop]: Abstraction has 13938 states and 53543 transitions. [2021-06-05 17:06:30,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:06:30,809 INFO L276 IsEmpty]: Start isEmpty. Operand 13938 states and 53543 transitions. [2021-06-05 17:06:30,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:30,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:30,829 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:31,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 17:06:31,030 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:31,030 INFO L82 PathProgramCache]: Analyzing trace with hash -158749623, now seen corresponding path program 83 times [2021-06-05 17:06:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:31,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336440896] [2021-06-05 17:06:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:31,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:31,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336440896] [2021-06-05 17:06:31,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336440896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:31,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439696009] [2021-06-05 17:06:31,061 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:31,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:06:31,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:31,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:31,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:31,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439696009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:31,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:31,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:06:31,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121220237] [2021-06-05 17:06:31,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:06:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:06:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:06:31,168 INFO L87 Difference]: Start difference. First operand 13938 states and 53543 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 17:06:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:32,046 INFO L93 Difference]: Finished difference Result 26084 states and 94333 transitions. [2021-06-05 17:06:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:06:32,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-06-05 17:06:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:32,098 INFO L225 Difference]: With dead ends: 26084 [2021-06-05 17:06:32,099 INFO L226 Difference]: Without dead ends: 26084 [2021-06-05 17:06:32,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:06:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26084 states. [2021-06-05 17:06:32,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26084 to 13918. [2021-06-05 17:06:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 3.840698426384997) internal successors, (53451), 13917 states have internal predecessors, (53451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:32,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 53451 transitions. [2021-06-05 17:06:32,422 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 53451 transitions. Word has length 28 [2021-06-05 17:06:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:32,423 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 53451 transitions. [2021-06-05 17:06:32,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 17:06:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 53451 transitions. [2021-06-05 17:06:32,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:32,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:32,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:32,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 17:06:32,643 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:32,643 INFO L82 PathProgramCache]: Analyzing trace with hash 368022285, now seen corresponding path program 101 times [2021-06-05 17:06:32,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:32,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937047826] [2021-06-05 17:06:32,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:32,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937047826] [2021-06-05 17:06:32,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937047826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:32,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357502424] [2021-06-05 17:06:32,667 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:32,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:32,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:32,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:32,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357502424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:32,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:32,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:06:32,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439351447] [2021-06-05 17:06:32,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:06:32,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:06:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:06:32,766 INFO L87 Difference]: Start difference. First operand 13918 states and 53451 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:33,396 INFO L93 Difference]: Finished difference Result 21840 states and 79850 transitions. [2021-06-05 17:06:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:06:33,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:06:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:33,439 INFO L225 Difference]: With dead ends: 21840 [2021-06-05 17:06:33,439 INFO L226 Difference]: Without dead ends: 21827 [2021-06-05 17:06:33,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:06:33,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21827 states. [2021-06-05 17:06:33,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21827 to 15432. [2021-06-05 17:06:33,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15432 states, 15431 states have (on average 3.899293629706435) internal successors, (60170), 15431 states have internal predecessors, (60170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15432 states to 15432 states and 60170 transitions. [2021-06-05 17:06:33,790 INFO L78 Accepts]: Start accepts. Automaton has 15432 states and 60170 transitions. Word has length 28 [2021-06-05 17:06:33,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:33,790 INFO L482 AbstractCegarLoop]: Abstraction has 15432 states and 60170 transitions. [2021-06-05 17:06:33,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 15432 states and 60170 transitions. [2021-06-05 17:06:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:33,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:33,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:34,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 17:06:34,013 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1040435067, now seen corresponding path program 102 times [2021-06-05 17:06:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:34,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168379991] [2021-06-05 17:06:34,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:34,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:34,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168379991] [2021-06-05 17:06:34,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168379991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:34,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670117666] [2021-06-05 17:06:34,046 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:34,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:34,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:34,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:34,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670117666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:34,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:34,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 17:06:34,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501878729] [2021-06-05 17:06:34,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:06:34,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:06:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:06:34,144 INFO L87 Difference]: Start difference. First operand 15432 states and 60170 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:34,887 INFO L93 Difference]: Finished difference Result 22001 states and 80297 transitions. [2021-06-05 17:06:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:06:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:06:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:34,927 INFO L225 Difference]: With dead ends: 22001 [2021-06-05 17:06:34,927 INFO L226 Difference]: Without dead ends: 21986 [2021-06-05 17:06:34,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:06:34,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21986 states. [2021-06-05 17:06:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21986 to 15399. [2021-06-05 17:06:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15399 states, 15398 states have (on average 3.89829848032212) internal successors, (60026), 15398 states have internal predecessors, (60026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15399 states to 15399 states and 60026 transitions. [2021-06-05 17:06:35,259 INFO L78 Accepts]: Start accepts. Automaton has 15399 states and 60026 transitions. Word has length 28 [2021-06-05 17:06:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:35,259 INFO L482 AbstractCegarLoop]: Abstraction has 15399 states and 60026 transitions. [2021-06-05 17:06:35,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 15399 states and 60026 transitions. [2021-06-05 17:06:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:35,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:35,282 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:35,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:35,482 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:35,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:35,483 INFO L82 PathProgramCache]: Analyzing trace with hash -774903755, now seen corresponding path program 103 times [2021-06-05 17:06:35,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:35,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314067768] [2021-06-05 17:06:35,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:35,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314067768] [2021-06-05 17:06:35,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314067768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956872417] [2021-06-05 17:06:35,507 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:35,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:35,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:35,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956872417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:35,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:35,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:06:35,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111076003] [2021-06-05 17:06:35,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:35,598 INFO L87 Difference]: Start difference. First operand 15399 states and 60026 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:06:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:36,181 INFO L93 Difference]: Finished difference Result 25011 states and 91344 transitions. [2021-06-05 17:06:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:06:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 17:06:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:36,230 INFO L225 Difference]: With dead ends: 25011 [2021-06-05 17:06:36,230 INFO L226 Difference]: Without dead ends: 24998 [2021-06-05 17:06:36,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 284.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:06:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24998 states. [2021-06-05 17:06:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24998 to 15493. [2021-06-05 17:06:36,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15493 states, 15492 states have (on average 3.904014975471211) internal successors, (60481), 15492 states have internal predecessors, (60481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15493 states to 15493 states and 60481 transitions. [2021-06-05 17:06:36,599 INFO L78 Accepts]: Start accepts. Automaton has 15493 states and 60481 transitions. Word has length 28 [2021-06-05 17:06:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:36,599 INFO L482 AbstractCegarLoop]: Abstraction has 15493 states and 60481 transitions. [2021-06-05 17:06:36,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:06:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15493 states and 60481 transitions. [2021-06-05 17:06:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:36,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:36,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:36,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:36,821 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:36,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1457648085, now seen corresponding path program 104 times [2021-06-05 17:06:36,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:36,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317648812] [2021-06-05 17:06:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:36,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:36,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317648812] [2021-06-05 17:06:36,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317648812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:36,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678963611] [2021-06-05 17:06:36,847 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:36,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:36,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:36,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678963611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:36,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:36,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 17:06:36,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390811694] [2021-06-05 17:06:36,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:36,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:36,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:36,940 INFO L87 Difference]: Start difference. First operand 15493 states and 60481 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:06:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:37,590 INFO L93 Difference]: Finished difference Result 26795 states and 97004 transitions. [2021-06-05 17:06:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 17:06:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-06-05 17:06:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:37,645 INFO L225 Difference]: With dead ends: 26795 [2021-06-05 17:06:37,645 INFO L226 Difference]: Without dead ends: 26795 [2021-06-05 17:06:37,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:06:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26795 states. [2021-06-05 17:06:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26795 to 15546. [2021-06-05 17:06:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15546 states, 15545 states have (on average 3.900482470247668) internal successors, (60633), 15545 states have internal predecessors, (60633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15546 states to 15546 states and 60633 transitions. [2021-06-05 17:06:38,076 INFO L78 Accepts]: Start accepts. Automaton has 15546 states and 60633 transitions. Word has length 28 [2021-06-05 17:06:38,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:38,076 INFO L482 AbstractCegarLoop]: Abstraction has 15546 states and 60633 transitions. [2021-06-05 17:06:38,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 17:06:38,076 INFO L276 IsEmpty]: Start isEmpty. Operand 15546 states and 60633 transitions. [2021-06-05 17:06:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:38,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:38,099 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:38,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:38,299 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:38,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1381492369, now seen corresponding path program 84 times [2021-06-05 17:06:38,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:38,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055083622] [2021-06-05 17:06:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:38,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:38,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055083622] [2021-06-05 17:06:38,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055083622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:38,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893040784] [2021-06-05 17:06:38,329 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:38,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:06:38,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:38,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:38,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:38,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893040784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:38,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:38,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:06:38,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263487264] [2021-06-05 17:06:38,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:06:38,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:06:38,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:06:38,420 INFO L87 Difference]: Start difference. First operand 15546 states and 60633 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) 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 17:06:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:39,264 INFO L93 Difference]: Finished difference Result 26187 states and 97576 transitions. [2021-06-05 17:06:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 17:06:39,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) 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 28 [2021-06-05 17:06:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:39,320 INFO L225 Difference]: With dead ends: 26187 [2021-06-05 17:06:39,320 INFO L226 Difference]: Without dead ends: 26183 [2021-06-05 17:06:39,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:06:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26183 states. [2021-06-05 17:06:39,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26183 to 15842. [2021-06-05 17:06:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 3.8898428129537277) internal successors, (61619), 15841 states have internal predecessors, (61619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 61619 transitions. [2021-06-05 17:06:39,712 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 61619 transitions. Word has length 28 [2021-06-05 17:06:39,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:39,712 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 61619 transitions. [2021-06-05 17:06:39,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) 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 17:06:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 61619 transitions. [2021-06-05 17:06:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:39,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:39,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:39,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:39,936 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:39,936 INFO L82 PathProgramCache]: Analyzing trace with hash -516108431, now seen corresponding path program 105 times [2021-06-05 17:06:39,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:39,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591602796] [2021-06-05 17:06:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:39,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:39,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591602796] [2021-06-05 17:06:39,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591602796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:39,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596787484] [2021-06-05 17:06:39,965 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:39,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:06:39,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:39,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:39,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:40,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596787484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:40,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:40,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:06:40,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361515771] [2021-06-05 17:06:40,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:40,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:40,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:40,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:40,051 INFO L87 Difference]: Start difference. First operand 15842 states and 61619 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:06:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:40,629 INFO L93 Difference]: Finished difference Result 23185 states and 86238 transitions. [2021-06-05 17:06:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:06:40,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 17:06:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:40,673 INFO L225 Difference]: With dead ends: 23185 [2021-06-05 17:06:40,674 INFO L226 Difference]: Without dead ends: 23162 [2021-06-05 17:06:40,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:06:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23162 states. [2021-06-05 17:06:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23162 to 15987. [2021-06-05 17:06:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15987 states, 15986 states have (on average 3.90191417490304) internal successors, (62376), 15986 states have internal predecessors, (62376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15987 states to 15987 states and 62376 transitions. [2021-06-05 17:06:41,070 INFO L78 Accepts]: Start accepts. Automaton has 15987 states and 62376 transitions. Word has length 28 [2021-06-05 17:06:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:41,070 INFO L482 AbstractCegarLoop]: Abstraction has 15987 states and 62376 transitions. [2021-06-05 17:06:41,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:06:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 15987 states and 62376 transitions. [2021-06-05 17:06:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:41,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:41,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:41,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 17:06:41,292 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1198852761, now seen corresponding path program 106 times [2021-06-05 17:06:41,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:41,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281882036] [2021-06-05 17:06:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:41,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281882036] [2021-06-05 17:06:41,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281882036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:41,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988850390] [2021-06-05 17:06:41,320 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:41,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:41,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:41,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988850390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:41,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:41,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:06:41,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906772895] [2021-06-05 17:06:41,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:41,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:41,407 INFO L87 Difference]: Start difference. First operand 15987 states and 62376 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:06:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:42,033 INFO L93 Difference]: Finished difference Result 22747 states and 83421 transitions. [2021-06-05 17:06:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:06:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 17:06:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:42,075 INFO L225 Difference]: With dead ends: 22747 [2021-06-05 17:06:42,076 INFO L226 Difference]: Without dead ends: 22747 [2021-06-05 17:06:42,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:06:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22747 states. [2021-06-05 17:06:42,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22747 to 16102. [2021-06-05 17:06:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16102 states, 16101 states have (on average 3.8941059561517917) internal successors, (62699), 16101 states have internal predecessors, (62699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16102 states to 16102 states and 62699 transitions. [2021-06-05 17:06:42,403 INFO L78 Accepts]: Start accepts. Automaton has 16102 states and 62699 transitions. Word has length 28 [2021-06-05 17:06:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:42,403 INFO L482 AbstractCegarLoop]: Abstraction has 16102 states and 62699 transitions. [2021-06-05 17:06:42,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:06:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 16102 states and 62699 transitions. [2021-06-05 17:06:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:42,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:42,425 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:42,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 17:06:42,625 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:42,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:42,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1518971225, now seen corresponding path program 107 times [2021-06-05 17:06:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:42,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218996919] [2021-06-05 17:06:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:42,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:42,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218996919] [2021-06-05 17:06:42,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218996919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:42,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381625747] [2021-06-05 17:06:42,654 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:42,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:06:42,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:42,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:42,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:42,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381625747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:42,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:42,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:06:42,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308316611] [2021-06-05 17:06:42,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:42,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:42,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:42,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:42,742 INFO L87 Difference]: Start difference. First operand 16102 states and 62699 transitions. Second operand has 13 states, 13 states have (on average 3.0) 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 17:06:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:43,350 INFO L93 Difference]: Finished difference Result 25248 states and 92992 transitions. [2021-06-05 17:06:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:06:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) 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 28 [2021-06-05 17:06:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:43,401 INFO L225 Difference]: With dead ends: 25248 [2021-06-05 17:06:43,401 INFO L226 Difference]: Without dead ends: 25248 [2021-06-05 17:06:43,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:06:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25248 states. [2021-06-05 17:06:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25248 to 17267. [2021-06-05 17:06:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17267 states, 17266 states have (on average 3.875709486852774) internal successors, (66918), 17266 states have internal predecessors, (66918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17267 states to 17267 states and 66918 transitions. [2021-06-05 17:06:43,874 INFO L78 Accepts]: Start accepts. Automaton has 17267 states and 66918 transitions. Word has length 28 [2021-06-05 17:06:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:43,874 INFO L482 AbstractCegarLoop]: Abstraction has 17267 states and 66918 transitions. [2021-06-05 17:06:43,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) 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 17:06:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 17267 states and 66918 transitions. [2021-06-05 17:06:43,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:43,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:43,896 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:44,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 17:06:44,097 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash -629568261, now seen corresponding path program 108 times [2021-06-05 17:06:44,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:44,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543447229] [2021-06-05 17:06:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:44,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:44,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543447229] [2021-06-05 17:06:44,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543447229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:44,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056351851] [2021-06-05 17:06:44,125 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:44,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:06:44,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:44,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056351851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:06:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291450583] [2021-06-05 17:06:44,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:06:44,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:44,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:06:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:06:44,223 INFO L87 Difference]: Start difference. First operand 17267 states and 66918 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) 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 17:06:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:44,992 INFO L93 Difference]: Finished difference Result 28557 states and 103702 transitions. [2021-06-05 17:06:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:06:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) 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 28 [2021-06-05 17:06:44,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:45,053 INFO L225 Difference]: With dead ends: 28557 [2021-06-05 17:06:45,054 INFO L226 Difference]: Without dead ends: 28557 [2021-06-05 17:06:45,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:06:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28557 states. [2021-06-05 17:06:45,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28557 to 17513. [2021-06-05 17:06:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17513 states, 17512 states have (on average 3.8901324805847417) internal successors, (68124), 17512 states have internal predecessors, (68124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17513 states to 17513 states and 68124 transitions. [2021-06-05 17:06:45,428 INFO L78 Accepts]: Start accepts. Automaton has 17513 states and 68124 transitions. Word has length 28 [2021-06-05 17:06:45,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:45,428 INFO L482 AbstractCegarLoop]: Abstraction has 17513 states and 68124 transitions. [2021-06-05 17:06:45,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) 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 17:06:45,428 INFO L276 IsEmpty]: Start isEmpty. Operand 17513 states and 68124 transitions. [2021-06-05 17:06:45,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:45,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:45,451 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:45,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 17:06:45,652 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1952101299, now seen corresponding path program 85 times [2021-06-05 17:06:45,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:45,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525149600] [2021-06-05 17:06:45,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:45,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:45,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525149600] [2021-06-05 17:06:45,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525149600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:45,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726906009] [2021-06-05 17:06:45,683 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:45,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726906009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:45,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:45,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:06:45,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713589266] [2021-06-05 17:06:45,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:45,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:45,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:45,798 INFO L87 Difference]: Start difference. First operand 17513 states and 68124 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:47,140 INFO L93 Difference]: Finished difference Result 45668 states and 165537 transitions. [2021-06-05 17:06:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:06:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 17:06:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:47,242 INFO L225 Difference]: With dead ends: 45668 [2021-06-05 17:06:47,242 INFO L226 Difference]: Without dead ends: 45668 [2021-06-05 17:06:47,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 804.1ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:06:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45668 states. [2021-06-05 17:06:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45668 to 18875. [2021-06-05 17:06:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18875 states, 18874 states have (on average 3.927943202288863) internal successors, (74136), 18874 states have internal predecessors, (74136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18875 states to 18875 states and 74136 transitions. [2021-06-05 17:06:47,955 INFO L78 Accepts]: Start accepts. Automaton has 18875 states and 74136 transitions. Word has length 28 [2021-06-05 17:06:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:47,955 INFO L482 AbstractCegarLoop]: Abstraction has 18875 states and 74136 transitions. [2021-06-05 17:06:47,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 18875 states and 74136 transitions. [2021-06-05 17:06:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:47,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:47,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:48,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:48,182 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1385149219, now seen corresponding path program 86 times [2021-06-05 17:06:48,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:48,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697339864] [2021-06-05 17:06:48,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:48,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:48,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697339864] [2021-06-05 17:06:48,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697339864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361961433] [2021-06-05 17:06:48,215 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:48,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:48,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361961433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:48,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:06:48,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574771179] [2021-06-05 17:06:48,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:48,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:48,328 INFO L87 Difference]: Start difference. First operand 18875 states and 74136 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:49,687 INFO L93 Difference]: Finished difference Result 44591 states and 162736 transitions. [2021-06-05 17:06:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:06:49,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 17:06:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:49,788 INFO L225 Difference]: With dead ends: 44591 [2021-06-05 17:06:49,788 INFO L226 Difference]: Without dead ends: 44591 [2021-06-05 17:06:49,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:06:49,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44591 states. [2021-06-05 17:06:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44591 to 18843. [2021-06-05 17:06:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18843 states, 18842 states have (on average 3.924848742171744) internal successors, (73952), 18842 states have internal predecessors, (73952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18843 states to 18843 states and 73952 transitions. [2021-06-05 17:06:50,535 INFO L78 Accepts]: Start accepts. Automaton has 18843 states and 73952 transitions. Word has length 28 [2021-06-05 17:06:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:50,535 INFO L482 AbstractCegarLoop]: Abstraction has 18843 states and 73952 transitions. [2021-06-05 17:06:50,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:06:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 18843 states and 73952 transitions. [2021-06-05 17:06:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:50,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:50,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:50,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 17:06:50,763 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:50,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:50,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1667375567, now seen corresponding path program 109 times [2021-06-05 17:06:50,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:50,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906775193] [2021-06-05 17:06:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:50,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:50,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906775193] [2021-06-05 17:06:50,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906775193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:50,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145257500] [2021-06-05 17:06:50,807 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:50,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:50,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145257500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:50,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:50,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:06:50,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439240709] [2021-06-05 17:06:50,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:06:50,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:50,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:06:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:06:50,883 INFO L87 Difference]: Start difference. First operand 18843 states and 73952 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 17:06:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:51,178 INFO L93 Difference]: Finished difference Result 30303 states and 117561 transitions. [2021-06-05 17:06:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:06:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 17:06:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:51,252 INFO L225 Difference]: With dead ends: 30303 [2021-06-05 17:06:51,253 INFO L226 Difference]: Without dead ends: 30256 [2021-06-05 17:06:51,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:06:51,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30256 states. [2021-06-05 17:06:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30256 to 24046. [2021-06-05 17:06:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24046 states, 24045 states have (on average 3.9271782075275525) internal successors, (94429), 24045 states have internal predecessors, (94429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24046 states to 24046 states and 94429 transitions. [2021-06-05 17:06:51,730 INFO L78 Accepts]: Start accepts. Automaton has 24046 states and 94429 transitions. Word has length 28 [2021-06-05 17:06:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:51,730 INFO L482 AbstractCegarLoop]: Abstraction has 24046 states and 94429 transitions. [2021-06-05 17:06:51,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 17:06:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 24046 states and 94429 transitions. [2021-06-05 17:06:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:51,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:51,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:51,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 17:06:51,962 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:51,963 INFO L82 PathProgramCache]: Analyzing trace with hash 242691175, now seen corresponding path program 110 times [2021-06-05 17:06:51,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:51,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374789391] [2021-06-05 17:06:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:51,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:51,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374789391] [2021-06-05 17:06:51,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374789391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:51,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418491489] [2021-06-05 17:06:51,994 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:52,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:52,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:06:52,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:52,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418491489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:52,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:52,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 17:06:52,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46772755] [2021-06-05 17:06:52,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:06:52,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:06:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:06:52,069 INFO L87 Difference]: Start difference. First operand 24046 states and 94429 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 17:06:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:52,322 INFO L93 Difference]: Finished difference Result 26794 states and 102777 transitions. [2021-06-05 17:06:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:06:52,322 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 28 [2021-06-05 17:06:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:52,382 INFO L225 Difference]: With dead ends: 26794 [2021-06-05 17:06:52,382 INFO L226 Difference]: Without dead ends: 26794 [2021-06-05 17:06:52,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26794 states. [2021-06-05 17:06:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26794 to 23549. [2021-06-05 17:06:52,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23549 states, 23548 states have (on average 3.9178274163410904) internal successors, (92257), 23548 states have internal predecessors, (92257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23549 states to 23549 states and 92257 transitions. [2021-06-05 17:06:52,834 INFO L78 Accepts]: Start accepts. Automaton has 23549 states and 92257 transitions. Word has length 28 [2021-06-05 17:06:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:52,834 INFO L482 AbstractCegarLoop]: Abstraction has 23549 states and 92257 transitions. [2021-06-05 17:06:52,834 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 17:06:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 23549 states and 92257 transitions. [2021-06-05 17:06:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:52,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:52,867 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:53,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 17:06:53,067 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:53,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:53,067 INFO L82 PathProgramCache]: Analyzing trace with hash -708990263, now seen corresponding path program 111 times [2021-06-05 17:06:53,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:53,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997886938] [2021-06-05 17:06:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:53,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:53,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997886938] [2021-06-05 17:06:53,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997886938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:53,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589297836] [2021-06-05 17:06:53,101 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:53,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:53,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:53,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:53,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:53,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:53,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589297836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:53,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:53,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-05 17:06:53,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158750081] [2021-06-05 17:06:53,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:06:53,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:53,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:06:53,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:06:53,210 INFO L87 Difference]: Start difference. First operand 23549 states and 92257 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:54,091 INFO L93 Difference]: Finished difference Result 36148 states and 135030 transitions. [2021-06-05 17:06:54,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:06:54,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 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 28 [2021-06-05 17:06:54,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:54,169 INFO L225 Difference]: With dead ends: 36148 [2021-06-05 17:06:54,170 INFO L226 Difference]: Without dead ends: 36148 [2021-06-05 17:06:54,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 17:06:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36148 states. [2021-06-05 17:06:54,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36148 to 23617. [2021-06-05 17:06:54,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23617 states, 23616 states have (on average 3.915989159891599) internal successors, (92480), 23616 states have internal predecessors, (92480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:54,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23617 states to 23617 states and 92480 transitions. [2021-06-05 17:06:54,724 INFO L78 Accepts]: Start accepts. Automaton has 23617 states and 92480 transitions. Word has length 28 [2021-06-05 17:06:54,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:54,725 INFO L482 AbstractCegarLoop]: Abstraction has 23617 states and 92480 transitions. [2021-06-05 17:06:54,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:54,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23617 states and 92480 transitions. [2021-06-05 17:06:54,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:54,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:54,759 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:54,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:54,959 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:54,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:54,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1685309107, now seen corresponding path program 112 times [2021-06-05 17:06:54,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:54,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761065159] [2021-06-05 17:06:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761065159] [2021-06-05 17:06:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761065159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116478650] [2021-06-05 17:06:54,992 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:55,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:55,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:55,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:55,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116478650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:55,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:55,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:06:55,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536862447] [2021-06-05 17:06:55,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:55,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:55,098 INFO L87 Difference]: Start difference. First operand 23617 states and 92480 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:06:56,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:56,399 INFO L93 Difference]: Finished difference Result 46617 states and 172038 transitions. [2021-06-05 17:06:56,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:06:56,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 17:06:56,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:56,501 INFO L225 Difference]: With dead ends: 46617 [2021-06-05 17:06:56,501 INFO L226 Difference]: Without dead ends: 46617 [2021-06-05 17:06:56,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 757.3ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 17:06:56,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46617 states. [2021-06-05 17:06:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46617 to 23616. [2021-06-05 17:06:57,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23616 states, 23615 states have (on average 3.9178488248994285) internal successors, (92520), 23615 states have internal predecessors, (92520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23616 states to 23616 states and 92520 transitions. [2021-06-05 17:06:57,297 INFO L78 Accepts]: Start accepts. Automaton has 23616 states and 92520 transitions. Word has length 28 [2021-06-05 17:06:57,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:57,297 INFO L482 AbstractCegarLoop]: Abstraction has 23616 states and 92520 transitions. [2021-06-05 17:06:57,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:06:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 23616 states and 92520 transitions. [2021-06-05 17:06:57,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:57,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:57,328 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:06:57,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:57,529 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1118357027, now seen corresponding path program 113 times [2021-06-05 17:06:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:57,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394565719] [2021-06-05 17:06:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:57,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:57,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394565719] [2021-06-05 17:06:57,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394565719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:57,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213196748] [2021-06-05 17:06:57,562 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:57,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:06:57,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:06:57,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:57,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213196748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:57,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:57,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 17:06:57,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27688671] [2021-06-05 17:06:57,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:06:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:06:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:06:57,667 INFO L87 Difference]: Start difference. First operand 23616 states and 92520 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:06:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:58,910 INFO L93 Difference]: Finished difference Result 46345 states and 171695 transitions. [2021-06-05 17:06:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:06:58,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 17:06:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:59,011 INFO L225 Difference]: With dead ends: 46345 [2021-06-05 17:06:59,011 INFO L226 Difference]: Without dead ends: 46345 [2021-06-05 17:06:59,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:06:59,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46345 states. [2021-06-05 17:06:59,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46345 to 23400. [2021-06-05 17:06:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23400 states, 23399 states have (on average 3.9111927860164966) internal successors, (91518), 23399 states have internal predecessors, (91518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23400 states to 23400 states and 91518 transitions. [2021-06-05 17:06:59,671 INFO L78 Accepts]: Start accepts. Automaton has 23400 states and 91518 transitions. Word has length 28 [2021-06-05 17:06:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:59,671 INFO L482 AbstractCegarLoop]: Abstraction has 23400 states and 91518 transitions. [2021-06-05 17:06:59,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:06:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 23400 states and 91518 transitions. [2021-06-05 17:06:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:59,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:59,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:59,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 17:06:59,903 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:59,903 INFO L82 PathProgramCache]: Analyzing trace with hash -182218355, now seen corresponding path program 114 times [2021-06-05 17:06:59,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:59,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214558455] [2021-06-05 17:06:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:06:59,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214558455] [2021-06-05 17:06:59,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214558455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:59,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661086022] [2021-06-05 17:06:59,928 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:59,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:59,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:59,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:06:59,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:07:00,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661086022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:00,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:00,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:07:00,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62882706] [2021-06-05 17:07:00,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:00,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:00,003 INFO L87 Difference]: Start difference. First operand 23400 states and 91518 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 17:07:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:00,271 INFO L93 Difference]: Finished difference Result 35770 states and 134580 transitions. [2021-06-05 17:07:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:07:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-06-05 17:07:00,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:00,347 INFO L225 Difference]: With dead ends: 35770 [2021-06-05 17:07:00,347 INFO L226 Difference]: Without dead ends: 35753 [2021-06-05 17:07:00,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:07:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35753 states. [2021-06-05 17:07:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35753 to 23671. [2021-06-05 17:07:00,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23671 states, 23670 states have (on average 3.9156738487536966) internal successors, (92684), 23670 states have internal predecessors, (92684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23671 states to 23671 states and 92684 transitions. [2021-06-05 17:07:00,933 INFO L78 Accepts]: Start accepts. Automaton has 23671 states and 92684 transitions. Word has length 28 [2021-06-05 17:07:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:00,933 INFO L482 AbstractCegarLoop]: Abstraction has 23671 states and 92684 transitions. [2021-06-05 17:07:00,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 17:07:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 23671 states and 92684 transitions. [2021-06-05 17:07:00,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:00,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:00,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:01,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 17:07:01,166 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:01,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1325144395, now seen corresponding path program 115 times [2021-06-05 17:07:01,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:01,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068717127] [2021-06-05 17:07:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:01,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068717127] [2021-06-05 17:07:01,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068717127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:01,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090937830] [2021-06-05 17:07:01,191 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:07:01,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:07:01,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090937830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:01,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:01,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 17:07:01,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371001126] [2021-06-05 17:07:01,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:01,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:01,266 INFO L87 Difference]: Start difference. First operand 23671 states and 92684 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 17:07:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:01,543 INFO L93 Difference]: Finished difference Result 37952 states and 141497 transitions. [2021-06-05 17:07:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:07:01,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-06-05 17:07:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:01,624 INFO L225 Difference]: With dead ends: 37952 [2021-06-05 17:07:01,624 INFO L226 Difference]: Without dead ends: 37952 [2021-06-05 17:07:01,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:07:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37952 states. [2021-06-05 17:07:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37952 to 23340. [2021-06-05 17:07:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23340 states, 23339 states have (on average 3.903252067355071) internal successors, (91098), 23339 states have internal predecessors, (91098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:02,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23340 states to 23340 states and 91098 transitions. [2021-06-05 17:07:02,138 INFO L78 Accepts]: Start accepts. Automaton has 23340 states and 91098 transitions. Word has length 28 [2021-06-05 17:07:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:02,138 INFO L482 AbstractCegarLoop]: Abstraction has 23340 states and 91098 transitions. [2021-06-05 17:07:02,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 17:07:02,138 INFO L276 IsEmpty]: Start isEmpty. Operand 23340 states and 91098 transitions. [2021-06-05 17:07:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:02,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:02,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:02,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 17:07:02,376 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1623141335, now seen corresponding path program 116 times [2021-06-05 17:07:02,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:02,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584707593] [2021-06-05 17:07:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:02,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:02,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584707593] [2021-06-05 17:07:02,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584707593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:02,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826805261] [2021-06-05 17:07:02,408 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:02,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:02,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:02,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:02,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:02,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826805261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:02,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:02,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:07:02,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406335643] [2021-06-05 17:07:02,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:02,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:02,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:02,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:02,499 INFO L87 Difference]: Start difference. First operand 23340 states and 91098 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:07:03,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:03,207 INFO L93 Difference]: Finished difference Result 33275 states and 124927 transitions. [2021-06-05 17:07:03,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 17:07:03,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:07:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:03,281 INFO L225 Difference]: With dead ends: 33275 [2021-06-05 17:07:03,282 INFO L226 Difference]: Without dead ends: 33275 [2021-06-05 17:07:03,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 17:07:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33275 states. [2021-06-05 17:07:03,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33275 to 23388. [2021-06-05 17:07:03,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23388 states, 23387 states have (on average 3.9018258006584854) internal successors, (91252), 23387 states have internal predecessors, (91252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23388 states to 23388 states and 91252 transitions. [2021-06-05 17:07:03,931 INFO L78 Accepts]: Start accepts. Automaton has 23388 states and 91252 transitions. Word has length 28 [2021-06-05 17:07:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:03,931 INFO L482 AbstractCegarLoop]: Abstraction has 23388 states and 91252 transitions. [2021-06-05 17:07:03,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:07:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 23388 states and 91252 transitions. [2021-06-05 17:07:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:03,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:03,962 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:04,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 17:07:04,162 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1886911867, now seen corresponding path program 117 times [2021-06-05 17:07:04,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:04,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015273597] [2021-06-05 17:07:04,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:04,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:04,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015273597] [2021-06-05 17:07:04,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015273597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:04,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790741521] [2021-06-05 17:07:04,195 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:04,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:07:04,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:04,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:04,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:04,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790741521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:04,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:04,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:07:04,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319772580] [2021-06-05 17:07:04,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:04,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:04,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:04,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:04,284 INFO L87 Difference]: Start difference. First operand 23388 states and 91252 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:07:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:05,135 INFO L93 Difference]: Finished difference Result 34959 states and 129812 transitions. [2021-06-05 17:07:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:07:05,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:07:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:05,209 INFO L225 Difference]: With dead ends: 34959 [2021-06-05 17:07:05,209 INFO L226 Difference]: Without dead ends: 34959 [2021-06-05 17:07:05,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 486.3ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 17:07:05,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34959 states. [2021-06-05 17:07:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34959 to 23950. [2021-06-05 17:07:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23950 states, 23949 states have (on average 3.882625579356132) internal successors, (92985), 23949 states have internal predecessors, (92985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23950 states to 23950 states and 92985 transitions. [2021-06-05 17:07:05,785 INFO L78 Accepts]: Start accepts. Automaton has 23950 states and 92985 transitions. Word has length 28 [2021-06-05 17:07:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:05,786 INFO L482 AbstractCegarLoop]: Abstraction has 23950 states and 92985 transitions. [2021-06-05 17:07:05,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:07:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 23950 states and 92985 transitions. [2021-06-05 17:07:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:05,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:05,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:06,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 17:07:06,019 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:06,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1931733009, now seen corresponding path program 118 times [2021-06-05 17:07:06,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:06,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348571911] [2021-06-05 17:07:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:06,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348571911] [2021-06-05 17:07:06,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348571911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:06,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792834359] [2021-06-05 17:07:06,052 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:06,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:06,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792834359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:06,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:06,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 17:07:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412280437] [2021-06-05 17:07:06,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:06,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:06,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:06,140 INFO L87 Difference]: Start difference. First operand 23950 states and 92985 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:07:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:06,919 INFO L93 Difference]: Finished difference Result 34019 states and 127355 transitions. [2021-06-05 17:07:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:07:06,919 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:07:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:06,993 INFO L225 Difference]: With dead ends: 34019 [2021-06-05 17:07:06,993 INFO L226 Difference]: Without dead ends: 34015 [2021-06-05 17:07:06,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:07:07,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34015 states. [2021-06-05 17:07:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34015 to 23842. [2021-06-05 17:07:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 23841 states have (on average 3.885113879451365) internal successors, (92625), 23841 states have internal predecessors, (92625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 92625 transitions. [2021-06-05 17:07:07,733 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 92625 transitions. Word has length 28 [2021-06-05 17:07:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:07,733 INFO L482 AbstractCegarLoop]: Abstraction has 23842 states and 92625 transitions. [2021-06-05 17:07:07,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:07:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 92625 transitions. [2021-06-05 17:07:07,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:07,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:07,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:07,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:07,970 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:07,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1066349071, now seen corresponding path program 119 times [2021-06-05 17:07:07,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:07,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623914539] [2021-06-05 17:07:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:07,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:07,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623914539] [2021-06-05 17:07:07,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623914539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:07,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144646257] [2021-06-05 17:07:07,998 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:08,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:07:08,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:08,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:07:08,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 17:07:08,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144646257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:08,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:08,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 17:07:08,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389240560] [2021-06-05 17:07:08,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:07:08,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:08,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:07:08,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:07:08,073 INFO L87 Difference]: Start difference. First operand 23842 states and 92625 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 17:07:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:08,327 INFO L93 Difference]: Finished difference Result 30199 states and 113195 transitions. [2021-06-05 17:07:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:07:08,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-06-05 17:07:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:08,396 INFO L225 Difference]: With dead ends: 30199 [2021-06-05 17:07:08,396 INFO L226 Difference]: Without dead ends: 30199 [2021-06-05 17:07:08,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:07:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30199 states. [2021-06-05 17:07:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30199 to 24152. [2021-06-05 17:07:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24152 states, 24151 states have (on average 3.87718935033746) internal successors, (93638), 24151 states have internal predecessors, (93638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24152 states to 24152 states and 93638 transitions. [2021-06-05 17:07:08,847 INFO L78 Accepts]: Start accepts. Automaton has 24152 states and 93638 transitions. Word has length 28 [2021-06-05 17:07:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:08,847 INFO L482 AbstractCegarLoop]: Abstraction has 24152 states and 93638 transitions. [2021-06-05 17:07:08,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 17:07:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 24152 states and 93638 transitions. [2021-06-05 17:07:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:08,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:08,878 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:09,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 17:07:09,079 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:09,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:09,079 INFO L82 PathProgramCache]: Analyzing trace with hash -136149327, now seen corresponding path program 120 times [2021-06-05 17:07:09,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:09,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148947661] [2021-06-05 17:07:09,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:09,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:09,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148947661] [2021-06-05 17:07:09,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148947661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:09,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638051678] [2021-06-05 17:07:09,112 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:09,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:07:09,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:09,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:09,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:07:09,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638051678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:09,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:09,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:07:09,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394157280] [2021-06-05 17:07:09,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:09,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:09,191 INFO L87 Difference]: Start difference. First operand 24152 states and 93638 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:07:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:09,904 INFO L93 Difference]: Finished difference Result 35046 states and 129747 transitions. [2021-06-05 17:07:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:07:09,904 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:07:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:09,979 INFO L225 Difference]: With dead ends: 35046 [2021-06-05 17:07:09,979 INFO L226 Difference]: Without dead ends: 35046 [2021-06-05 17:07:09,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:07:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35046 states. [2021-06-05 17:07:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35046 to 25935. [2021-06-05 17:07:10,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.8859026760237527) internal successors, (100777), 25934 states have internal predecessors, (100777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 100777 transitions. [2021-06-05 17:07:10,566 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 100777 transitions. Word has length 28 [2021-06-05 17:07:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:10,566 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 100777 transitions. [2021-06-05 17:07:10,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:07:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 100777 transitions. [2021-06-05 17:07:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:10,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:10,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:10,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 17:07:10,800 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:10,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:10,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1975921655, now seen corresponding path program 121 times [2021-06-05 17:07:10,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:10,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245646103] [2021-06-05 17:07:10,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:10,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:10,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245646103] [2021-06-05 17:07:10,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245646103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:10,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706287168] [2021-06-05 17:07:10,836 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:10,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 17:07:10,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706287168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:10,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:10,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:07:10,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537633278] [2021-06-05 17:07:10,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:10,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:10,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:10,910 INFO L87 Difference]: Start difference. First operand 25935 states and 100777 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:07:11,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:11,609 INFO L93 Difference]: Finished difference Result 33305 states and 125259 transitions. [2021-06-05 17:07:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:07:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:07:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:11,679 INFO L225 Difference]: With dead ends: 33305 [2021-06-05 17:07:11,679 INFO L226 Difference]: Without dead ends: 33293 [2021-06-05 17:07:11,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:07:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33293 states. [2021-06-05 17:07:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33293 to 26101. [2021-06-05 17:07:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26101 states, 26100 states have (on average 3.880842911877395) internal successors, (101290), 26100 states have internal predecessors, (101290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26101 states to 26101 states and 101290 transitions. [2021-06-05 17:07:12,242 INFO L78 Accepts]: Start accepts. Automaton has 26101 states and 101290 transitions. Word has length 28 [2021-06-05 17:07:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:12,242 INFO L482 AbstractCegarLoop]: Abstraction has 26101 states and 101290 transitions. [2021-06-05 17:07:12,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:07:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 26101 states and 101290 transitions. [2021-06-05 17:07:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:12,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:12,278 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:12,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:12,478 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:12,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:12,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1688262325, now seen corresponding path program 122 times [2021-06-05 17:07:12,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:12,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807114722] [2021-06-05 17:07:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:12,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807114722] [2021-06-05 17:07:12,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807114722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:12,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758268602] [2021-06-05 17:07:12,504 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:12,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:12,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:07:12,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:12,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758268602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:12,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:12,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 17:07:12,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665254457] [2021-06-05 17:07:12,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:07:12,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:12,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:07:12,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:07:12,571 INFO L87 Difference]: Start difference. First operand 26101 states and 101290 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 17:07:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:12,809 INFO L93 Difference]: Finished difference Result 30661 states and 116866 transitions. [2021-06-05 17:07:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:07:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 28 [2021-06-05 17:07:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:12,875 INFO L225 Difference]: With dead ends: 30661 [2021-06-05 17:07:12,875 INFO L226 Difference]: Without dead ends: 30661 [2021-06-05 17:07:12,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:07:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30661 states. [2021-06-05 17:07:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30661 to 27307. [2021-06-05 17:07:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27307 states, 27306 states have (on average 3.8768402548890353) internal successors, (105861), 27306 states have internal predecessors, (105861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27307 states to 27307 states and 105861 transitions. [2021-06-05 17:07:13,373 INFO L78 Accepts]: Start accepts. Automaton has 27307 states and 105861 transitions. Word has length 28 [2021-06-05 17:07:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:13,373 INFO L482 AbstractCegarLoop]: Abstraction has 27307 states and 105861 transitions. [2021-06-05 17:07:13,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 17:07:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 27307 states and 105861 transitions. [2021-06-05 17:07:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:13,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:13,414 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:13,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:13,615 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2131923893, now seen corresponding path program 123 times [2021-06-05 17:07:13,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:13,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165412228] [2021-06-05 17:07:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:13,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165412228] [2021-06-05 17:07:13,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165412228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:13,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192869503] [2021-06-05 17:07:13,649 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:13,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:07:13,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:13,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192869503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:13,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:13,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:07:13,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832469321] [2021-06-05 17:07:13,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:13,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:13,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:13,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:13,728 INFO L87 Difference]: Start difference. First operand 27307 states and 105861 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:07:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:14,416 INFO L93 Difference]: Finished difference Result 35422 states and 132065 transitions. [2021-06-05 17:07:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:07:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 17:07:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:14,491 INFO L225 Difference]: With dead ends: 35422 [2021-06-05 17:07:14,491 INFO L226 Difference]: Without dead ends: 35422 [2021-06-05 17:07:14,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:07:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35422 states. [2021-06-05 17:07:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35422 to 28503. [2021-06-05 17:07:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28503 states, 28502 states have (on average 3.847694898603607) internal successors, (109667), 28502 states have internal predecessors, (109667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28503 states to 28503 states and 109667 transitions. [2021-06-05 17:07:15,203 INFO L78 Accepts]: Start accepts. Automaton has 28503 states and 109667 transitions. Word has length 28 [2021-06-05 17:07:15,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:15,203 INFO L482 AbstractCegarLoop]: Abstraction has 28503 states and 109667 transitions. [2021-06-05 17:07:15,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:07:15,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28503 states and 109667 transitions. [2021-06-05 17:07:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:15,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:15,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:15,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:15,445 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1422950451, now seen corresponding path program 124 times [2021-06-05 17:07:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:15,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867359634] [2021-06-05 17:07:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:15,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:15,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:15,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867359634] [2021-06-05 17:07:15,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867359634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:15,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306613377] [2021-06-05 17:07:15,484 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:15,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:15,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:15,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306613377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:15,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:15,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:07:15,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132980325] [2021-06-05 17:07:15,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:15,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:15,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:15,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:15,557 INFO L87 Difference]: Start difference. First operand 28503 states and 109667 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:16,092 INFO L93 Difference]: Finished difference Result 34544 states and 129722 transitions. [2021-06-05 17:07:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:07:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:07:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:16,165 INFO L225 Difference]: With dead ends: 34544 [2021-06-05 17:07:16,166 INFO L226 Difference]: Without dead ends: 34536 [2021-06-05 17:07:16,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:07:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34536 states. [2021-06-05 17:07:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34536 to 28309. [2021-06-05 17:07:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28309 states, 28308 states have (on average 3.853610286844708) internal successors, (109088), 28308 states have internal predecessors, (109088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28309 states to 28309 states and 109088 transitions. [2021-06-05 17:07:16,759 INFO L78 Accepts]: Start accepts. Automaton has 28309 states and 109088 transitions. Word has length 28 [2021-06-05 17:07:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:16,760 INFO L482 AbstractCegarLoop]: Abstraction has 28309 states and 109088 transitions. [2021-06-05 17:07:16,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 28309 states and 109088 transitions. [2021-06-05 17:07:16,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:16,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:16,801 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:17,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:17,001 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:17,001 INFO L82 PathProgramCache]: Analyzing trace with hash 27046477, now seen corresponding path program 125 times [2021-06-05 17:07:17,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:17,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811998699] [2021-06-05 17:07:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:17,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:17,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811998699] [2021-06-05 17:07:17,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811998699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:17,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082202900] [2021-06-05 17:07:17,030 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:17,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:17,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:17,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:17,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082202900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:17,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:17,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:07:17,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536119074] [2021-06-05 17:07:17,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:17,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:17,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:17,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:17,108 INFO L87 Difference]: Start difference. First operand 28309 states and 109088 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:17,763 INFO L93 Difference]: Finished difference Result 36390 states and 135344 transitions. [2021-06-05 17:07:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:07:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:07:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:17,842 INFO L225 Difference]: With dead ends: 36390 [2021-06-05 17:07:17,843 INFO L226 Difference]: Without dead ends: 36390 [2021-06-05 17:07:17,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:07:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36390 states. [2021-06-05 17:07:18,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36390 to 29319. [2021-06-05 17:07:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29319 states, 29318 states have (on average 3.831741592195921) internal successors, (112339), 29318 states have internal predecessors, (112339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29319 states to 29319 states and 112339 transitions. [2021-06-05 17:07:18,500 INFO L78 Accepts]: Start accepts. Automaton has 29319 states and 112339 transitions. Word has length 28 [2021-06-05 17:07:18,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:18,500 INFO L482 AbstractCegarLoop]: Abstraction has 29319 states and 112339 transitions. [2021-06-05 17:07:18,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 29319 states and 112339 transitions. [2021-06-05 17:07:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:18,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:18,544 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:18,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 17:07:18,745 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1055976179, now seen corresponding path program 126 times [2021-06-05 17:07:18,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:18,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695060863] [2021-06-05 17:07:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:18,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:18,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695060863] [2021-06-05 17:07:18,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695060863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:18,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923246189] [2021-06-05 17:07:18,774 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:18,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:07:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:18,975 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 17:07:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:18,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923246189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:18,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:18,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:07:18,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806413492] [2021-06-05 17:07:19,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:19,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:19,000 INFO L87 Difference]: Start difference. First operand 29319 states and 112339 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 17:07:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:19,325 INFO L93 Difference]: Finished difference Result 35637 states and 135551 transitions. [2021-06-05 17:07:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:07:19,326 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 28 [2021-06-05 17:07:19,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:19,404 INFO L225 Difference]: With dead ends: 35637 [2021-06-05 17:07:19,404 INFO L226 Difference]: Without dead ends: 35624 [2021-06-05 17:07:19,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 114.8ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35624 states. [2021-06-05 17:07:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35624 to 34097. [2021-06-05 17:07:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34097 states, 34096 states have (on average 3.845964335992492) internal successors, (131132), 34096 states have internal predecessors, (131132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34097 states to 34097 states and 131132 transitions. [2021-06-05 17:07:20,060 INFO L78 Accepts]: Start accepts. Automaton has 34097 states and 131132 transitions. Word has length 28 [2021-06-05 17:07:20,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:20,060 INFO L482 AbstractCegarLoop]: Abstraction has 34097 states and 131132 transitions. [2021-06-05 17:07:20,061 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 17:07:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34097 states and 131132 transitions. [2021-06-05 17:07:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:20,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:20,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:20,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable465,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:20,313 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash 415101939, now seen corresponding path program 127 times [2021-06-05 17:07:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:20,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562072167] [2021-06-05 17:07:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:20,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:20,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562072167] [2021-06-05 17:07:20,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562072167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:20,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983985066] [2021-06-05 17:07:20,342 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:20,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:20,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983985066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:20,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:20,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:07:20,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863887927] [2021-06-05 17:07:20,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:20,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:20,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:20,410 INFO L87 Difference]: Start difference. First operand 34097 states and 131132 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 17:07:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:20,737 INFO L93 Difference]: Finished difference Result 37254 states and 141034 transitions. [2021-06-05 17:07:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:07:20,738 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 28 [2021-06-05 17:07:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:20,818 INFO L225 Difference]: With dead ends: 37254 [2021-06-05 17:07:20,818 INFO L226 Difference]: Without dead ends: 37254 [2021-06-05 17:07:20,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:07:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37254 states. [2021-06-05 17:07:21,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37254 to 33774. [2021-06-05 17:07:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33774 states, 33773 states have (on average 3.8422704527285108) internal successors, (129765), 33773 states have internal predecessors, (129765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33774 states to 33774 states and 129765 transitions. [2021-06-05 17:07:21,767 INFO L78 Accepts]: Start accepts. Automaton has 33774 states and 129765 transitions. Word has length 28 [2021-06-05 17:07:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:21,767 INFO L482 AbstractCegarLoop]: Abstraction has 33774 states and 129765 transitions. [2021-06-05 17:07:21,767 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 17:07:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 33774 states and 129765 transitions. [2021-06-05 17:07:21,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:21,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:21,819 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:22,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 17:07:22,020 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:22,020 INFO L82 PathProgramCache]: Analyzing trace with hash -17774665, now seen corresponding path program 128 times [2021-06-05 17:07:22,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:22,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195237441] [2021-06-05 17:07:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:22,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:22,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195237441] [2021-06-05 17:07:22,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195237441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:22,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107871204] [2021-06-05 17:07:22,174 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:22,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:22,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:22,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:22,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107871204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:22,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:22,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:07:22,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483875541] [2021-06-05 17:07:22,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:22,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:22,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:22,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:22,248 INFO L87 Difference]: Start difference. First operand 33774 states and 129765 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:22,876 INFO L93 Difference]: Finished difference Result 40558 states and 152173 transitions. [2021-06-05 17:07:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:07:22,876 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:07:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:22,965 INFO L225 Difference]: With dead ends: 40558 [2021-06-05 17:07:22,966 INFO L226 Difference]: Without dead ends: 40550 [2021-06-05 17:07:22,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:07:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40550 states. [2021-06-05 17:07:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40550 to 33740. [2021-06-05 17:07:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33740 states, 33739 states have (on average 3.8426746495153976) internal successors, (129648), 33739 states have internal predecessors, (129648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33740 states to 33740 states and 129648 transitions. [2021-06-05 17:07:23,762 INFO L78 Accepts]: Start accepts. Automaton has 33740 states and 129648 transitions. Word has length 28 [2021-06-05 17:07:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:23,762 INFO L482 AbstractCegarLoop]: Abstraction has 33740 states and 129648 transitions. [2021-06-05 17:07:23,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 33740 states and 129648 transitions. [2021-06-05 17:07:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:23,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:23,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:24,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:24,015 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash -913595481, now seen corresponding path program 129 times [2021-06-05 17:07:24,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:24,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597948187] [2021-06-05 17:07:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:24,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597948187] [2021-06-05 17:07:24,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597948187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:24,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861084414] [2021-06-05 17:07:24,045 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:24,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:07:24,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:24,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861084414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:24,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:24,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 17:07:24,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534831859] [2021-06-05 17:07:24,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:07:24,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:24,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:07:24,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:07:24,113 INFO L87 Difference]: Start difference. First operand 33740 states and 129648 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 17:07:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:24,646 INFO L93 Difference]: Finished difference Result 36656 states and 139373 transitions. [2021-06-05 17:07:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:07:24,646 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 28 [2021-06-05 17:07:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:24,724 INFO L225 Difference]: With dead ends: 36656 [2021-06-05 17:07:24,724 INFO L226 Difference]: Without dead ends: 36656 [2021-06-05 17:07:24,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:07:24,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36656 states. [2021-06-05 17:07:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36656 to 34272. [2021-06-05 17:07:25,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34272 states, 34271 states have (on average 3.8409150593796504) internal successors, (131632), 34271 states have internal predecessors, (131632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34272 states to 34272 states and 131632 transitions. [2021-06-05 17:07:25,557 INFO L78 Accepts]: Start accepts. Automaton has 34272 states and 131632 transitions. Word has length 28 [2021-06-05 17:07:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:25,557 INFO L482 AbstractCegarLoop]: Abstraction has 34272 states and 131632 transitions. [2021-06-05 17:07:25,557 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 17:07:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 34272 states and 131632 transitions. [2021-06-05 17:07:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:25,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:25,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:25,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 17:07:25,813 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash 579561993, now seen corresponding path program 130 times [2021-06-05 17:07:25,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:25,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964279449] [2021-06-05 17:07:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:25,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964279449] [2021-06-05 17:07:25,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964279449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670406729] [2021-06-05 17:07:25,845 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:25,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:25,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:25,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:07:25,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670406729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:25,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:25,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 17:07:25,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642874642] [2021-06-05 17:07:25,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:25,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:25,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:25,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:25,923 INFO L87 Difference]: Start difference. First operand 34272 states and 131632 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:26,608 INFO L93 Difference]: Finished difference Result 41443 states and 155515 transitions. [2021-06-05 17:07:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:07:26,608 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-05 17:07:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:26,697 INFO L225 Difference]: With dead ends: 41443 [2021-06-05 17:07:26,697 INFO L226 Difference]: Without dead ends: 41419 [2021-06-05 17:07:26,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:07:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41419 states. [2021-06-05 17:07:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41419 to 34444. [2021-06-05 17:07:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34444 states, 34443 states have (on average 3.8372383358011786) internal successors, (132166), 34443 states have internal predecessors, (132166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34444 states to 34444 states and 132166 transitions. [2021-06-05 17:07:27,647 INFO L78 Accepts]: Start accepts. Automaton has 34444 states and 132166 transitions. Word has length 28 [2021-06-05 17:07:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:27,647 INFO L482 AbstractCegarLoop]: Abstraction has 34444 states and 132166 transitions. [2021-06-05 17:07:27,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 17:07:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 34444 states and 132166 transitions. [2021-06-05 17:07:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:27,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:27,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:07:27,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 17:07:27,897 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:27,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1271447701, now seen corresponding path program 131 times [2021-06-05 17:07:27,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:27,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860943777] [2021-06-05 17:07:27,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:27,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:27,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860943777] [2021-06-05 17:07:27,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860943777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:27,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671853524] [2021-06-05 17:07:27,933 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:27,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:07:27,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:27,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:07:27,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:28,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671853524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:28,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:28,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 17:07:28,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025564678] [2021-06-05 17:07:28,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:07:28,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:28,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:07:28,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:07:28,005 INFO L87 Difference]: Start difference. First operand 34444 states and 132166 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 17:07:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:28,610 INFO L93 Difference]: Finished difference Result 37076 states and 140866 transitions. [2021-06-05 17:07:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:07:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 28 [2021-06-05 17:07:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:28,704 INFO L225 Difference]: With dead ends: 37076 [2021-06-05 17:07:28,704 INFO L226 Difference]: Without dead ends: 37076 [2021-06-05 17:07:28,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:07:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37076 states. [2021-06-05 17:07:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37076 to 34370. [2021-06-05 17:07:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34370 states, 34369 states have (on average 3.8380517326660653) internal successors, (131910), 34369 states have internal predecessors, (131910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34370 states to 34370 states and 131910 transitions. [2021-06-05 17:07:29,443 INFO L78 Accepts]: Start accepts. Automaton has 34370 states and 131910 transitions. Word has length 28 [2021-06-05 17:07:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:29,443 INFO L482 AbstractCegarLoop]: Abstraction has 34370 states and 131910 transitions. [2021-06-05 17:07:29,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 17:07:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 34370 states and 131910 transitions. [2021-06-05 17:07:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:29,496 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:29,496 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:29,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:29,696 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -412931571, now seen corresponding path program 132 times [2021-06-05 17:07:29,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:29,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404625420] [2021-06-05 17:07:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:29,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404625420] [2021-06-05 17:07:29,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404625420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:29,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991213848] [2021-06-05 17:07:29,734 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:29,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:07:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:29,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991213848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:29,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:29,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:07:29,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094719611] [2021-06-05 17:07:29,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:07:29,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:29,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:07:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:07:29,814 INFO L87 Difference]: Start difference. First operand 34370 states and 131910 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:07:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:30,611 INFO L93 Difference]: Finished difference Result 41366 states and 155256 transitions. [2021-06-05 17:07:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 17:07:30,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 28 [2021-06-05 17:07:30,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:30,705 INFO L225 Difference]: With dead ends: 41366 [2021-06-05 17:07:30,705 INFO L226 Difference]: Without dead ends: 41326 [2021-06-05 17:07:30,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:07:30,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41326 states. [2021-06-05 17:07:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41326 to 34544. [2021-06-05 17:07:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34544 states, 34543 states have (on average 3.834264539848884) internal successors, (132447), 34543 states have internal predecessors, (132447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34544 states to 34544 states and 132447 transitions. [2021-06-05 17:07:31,602 INFO L78 Accepts]: Start accepts. Automaton has 34544 states and 132447 transitions. Word has length 28 [2021-06-05 17:07:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:31,603 INFO L482 AbstractCegarLoop]: Abstraction has 34544 states and 132447 transitions. [2021-06-05 17:07:31,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 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 17:07:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 34544 states and 132447 transitions. [2021-06-05 17:07:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:31,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:31,657 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:31,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable471 [2021-06-05 17:07:31,857 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:31,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:31,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1625942477, now seen corresponding path program 133 times [2021-06-05 17:07:31,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:31,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077597703] [2021-06-05 17:07:31,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:31,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077597703] [2021-06-05 17:07:31,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077597703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:31,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627052901] [2021-06-05 17:07:31,889 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:31,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:31,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:32,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627052901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:32,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:32,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:07:32,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886757283] [2021-06-05 17:07:32,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:32,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:32,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:32,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:32,009 INFO L87 Difference]: Start difference. First operand 34544 states and 132447 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:07:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:33,376 INFO L93 Difference]: Finished difference Result 76905 states and 284650 transitions. [2021-06-05 17:07:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:07:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 17:07:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:33,582 INFO L225 Difference]: With dead ends: 76905 [2021-06-05 17:07:33,582 INFO L226 Difference]: Without dead ends: 76905 [2021-06-05 17:07:33,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 747.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:07:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76905 states. [2021-06-05 17:07:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76905 to 43639. [2021-06-05 17:07:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43639 states, 43638 states have (on average 3.908336770704432) internal successors, (170552), 43638 states have internal predecessors, (170552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43639 states to 43639 states and 170552 transitions. [2021-06-05 17:07:35,157 INFO L78 Accepts]: Start accepts. Automaton has 43639 states and 170552 transitions. Word has length 28 [2021-06-05 17:07:35,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:35,157 INFO L482 AbstractCegarLoop]: Abstraction has 43639 states and 170552 transitions. [2021-06-05 17:07:35,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:07:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 43639 states and 170552 transitions. [2021-06-05 17:07:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:35,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:35,229 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:35,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:35,429 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2102072739, now seen corresponding path program 134 times [2021-06-05 17:07:35,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:35,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152740411] [2021-06-05 17:07:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:35,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152740411] [2021-06-05 17:07:35,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152740411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:35,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488019022] [2021-06-05 17:07:35,461 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:35,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:35,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:35,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:35,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:35,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488019022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:35,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:35,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:07:35,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396167348] [2021-06-05 17:07:35,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:35,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:35,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:35,581 INFO L87 Difference]: Start difference. First operand 43639 states and 170552 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:07:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:36,961 INFO L93 Difference]: Finished difference Result 76303 states and 283058 transitions. [2021-06-05 17:07:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:07:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 28 [2021-06-05 17:07:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:37,155 INFO L225 Difference]: With dead ends: 76303 [2021-06-05 17:07:37,155 INFO L226 Difference]: Without dead ends: 76303 [2021-06-05 17:07:37,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 628.0ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:07:37,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76303 states. [2021-06-05 17:07:38,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76303 to 43636. [2021-06-05 17:07:38,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43636 states, 43635 states have (on average 3.908284633894809) internal successors, (170538), 43635 states have internal predecessors, (170538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43636 states to 43636 states and 170538 transitions. [2021-06-05 17:07:38,593 INFO L78 Accepts]: Start accepts. Automaton has 43636 states and 170538 transitions. Word has length 28 [2021-06-05 17:07:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:38,593 INFO L482 AbstractCegarLoop]: Abstraction has 43636 states and 170538 transitions. [2021-06-05 17:07:38,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 17:07:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 43636 states and 170538 transitions. [2021-06-05 17:07:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:38,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:38,655 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:38,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:38,855 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1020548699, now seen corresponding path program 135 times [2021-06-05 17:07:38,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:38,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992124193] [2021-06-05 17:07:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:38,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:38,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992124193] [2021-06-05 17:07:38,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992124193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:38,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010982875] [2021-06-05 17:07:38,884 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:38,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:07:38,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010982875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:38,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:38,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:07:38,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199069748] [2021-06-05 17:07:38,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:38,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:38,991 INFO L87 Difference]: Start difference. First operand 43636 states and 170538 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:07:39,437 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-06-05 17:07:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:40,308 INFO L93 Difference]: Finished difference Result 70919 states and 264966 transitions. [2021-06-05 17:07:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 17:07:40,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 17:07:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:40,500 INFO L225 Difference]: With dead ends: 70919 [2021-06-05 17:07:40,500 INFO L226 Difference]: Without dead ends: 70919 [2021-06-05 17:07:40,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:07:40,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70919 states. [2021-06-05 17:07:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70919 to 43660. [2021-06-05 17:07:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.9085182894706705) internal successors, (170642), 43659 states have internal predecessors, (170642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:41,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170642 transitions. [2021-06-05 17:07:41,940 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170642 transitions. Word has length 28 [2021-06-05 17:07:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:41,940 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170642 transitions. [2021-06-05 17:07:41,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:07:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170642 transitions. [2021-06-05 17:07:42,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:42,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:42,002 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:42,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 17:07:42,202 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:42,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1101924787, now seen corresponding path program 136 times [2021-06-05 17:07:42,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:42,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852418667] [2021-06-05 17:07:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:42,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:42,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852418667] [2021-06-05 17:07:42,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852418667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:42,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573887496] [2021-06-05 17:07:42,231 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:42,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:07:42,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:42,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:42,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:42,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573887496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:42,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:42,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:07:42,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864864418] [2021-06-05 17:07:42,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:07:42,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:42,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:07:42,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:07:42,328 INFO L87 Difference]: Start difference. First operand 43660 states and 170642 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:07:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:43,464 INFO L93 Difference]: Finished difference Result 70043 states and 262701 transitions. [2021-06-05 17:07:43,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:07:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 17:07:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:43,639 INFO L225 Difference]: With dead ends: 70043 [2021-06-05 17:07:43,639 INFO L226 Difference]: Without dead ends: 70035 [2021-06-05 17:07:43,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 439.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:07:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70035 states. [2021-06-05 17:07:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70035 to 43660. [2021-06-05 17:07:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43660 states, 43659 states have (on average 3.908380860761813) internal successors, (170636), 43659 states have internal predecessors, (170636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43660 states to 43660 states and 170636 transitions. [2021-06-05 17:07:45,203 INFO L78 Accepts]: Start accepts. Automaton has 43660 states and 170636 transitions. Word has length 28 [2021-06-05 17:07:45,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:45,203 INFO L482 AbstractCegarLoop]: Abstraction has 43660 states and 170636 transitions. [2021-06-05 17:07:45,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:07:45,203 INFO L276 IsEmpty]: Start isEmpty. Operand 43660 states and 170636 transitions. [2021-06-05 17:07:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:45,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:45,265 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:45,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:45,466 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:45,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:45,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2032582003, now seen corresponding path program 137 times [2021-06-05 17:07:45,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:45,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222465339] [2021-06-05 17:07:45,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:45,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:45,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222465339] [2021-06-05 17:07:45,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222465339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:45,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054964896] [2021-06-05 17:07:45,494 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:45,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:07:45,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:45,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:45,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:45,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054964896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:45,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:45,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:07:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27625568] [2021-06-05 17:07:45,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:45,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:45,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:45,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:45,604 INFO L87 Difference]: Start difference. First operand 43660 states and 170636 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:46,498 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2021-06-05 17:07:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:46,822 INFO L93 Difference]: Finished difference Result 69550 states and 261394 transitions. [2021-06-05 17:07:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:07:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:07:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:46,995 INFO L225 Difference]: With dead ends: 69550 [2021-06-05 17:07:46,995 INFO L226 Difference]: Without dead ends: 69550 [2021-06-05 17:07:46,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 688.7ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:07:47,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69550 states. [2021-06-05 17:07:48,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69550 to 43668. [2021-06-05 17:07:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908443446996588) internal successors, (170670), 43667 states have internal predecessors, (170670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170670 transitions. [2021-06-05 17:07:48,504 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170670 transitions. Word has length 28 [2021-06-05 17:07:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:48,505 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170670 transitions. [2021-06-05 17:07:48,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170670 transitions. [2021-06-05 17:07:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:48,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:48,573 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:48,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 17:07:48,773 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:48,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -619346139, now seen corresponding path program 138 times [2021-06-05 17:07:48,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:48,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427660143] [2021-06-05 17:07:48,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:48,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:48,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427660143] [2021-06-05 17:07:48,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427660143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:48,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885697810] [2021-06-05 17:07:48,804 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:48,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:07:48,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:48,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:48,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:48,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885697810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:48,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:48,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:07:48,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373720224] [2021-06-05 17:07:48,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:07:48,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:48,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:07:48,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:07:48,918 INFO L87 Difference]: Start difference. First operand 43668 states and 170670 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:50,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:50,193 INFO L93 Difference]: Finished difference Result 69317 states and 260810 transitions. [2021-06-05 17:07:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:07:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:07:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:50,363 INFO L225 Difference]: With dead ends: 69317 [2021-06-05 17:07:50,364 INFO L226 Difference]: Without dead ends: 69309 [2021-06-05 17:07:50,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:07:50,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69309 states. [2021-06-05 17:07:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69309 to 43668. [2021-06-05 17:07:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43668 states, 43667 states have (on average 3.908397645819498) internal successors, (170668), 43667 states have internal predecessors, (170668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43668 states to 43668 states and 170668 transitions. [2021-06-05 17:07:51,640 INFO L78 Accepts]: Start accepts. Automaton has 43668 states and 170668 transitions. Word has length 28 [2021-06-05 17:07:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:51,640 INFO L482 AbstractCegarLoop]: Abstraction has 43668 states and 170668 transitions. [2021-06-05 17:07:51,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 43668 states and 170668 transitions. [2021-06-05 17:07:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:51,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:51,702 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:51,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 17:07:51,902 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash 384081845, now seen corresponding path program 139 times [2021-06-05 17:07:51,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:51,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839096211] [2021-06-05 17:07:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:51,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839096211] [2021-06-05 17:07:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839096211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560494759] [2021-06-05 17:07:51,932 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:51,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:51,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:52,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560494759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:52,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:52,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:07:52,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936380463] [2021-06-05 17:07:52,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:52,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:52,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:52,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:52,025 INFO L87 Difference]: Start difference. First operand 43668 states and 170668 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:07:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:53,306 INFO L93 Difference]: Finished difference Result 68845 states and 257637 transitions. [2021-06-05 17:07:53,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 17:07:53,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:07:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:53,476 INFO L225 Difference]: With dead ends: 68845 [2021-06-05 17:07:53,476 INFO L226 Difference]: Without dead ends: 68845 [2021-06-05 17:07:53,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 723.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 17:07:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68845 states. [2021-06-05 17:07:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68845 to 46904. [2021-06-05 17:07:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46904 states, 46903 states have (on average 3.911754045583438) internal successors, (183473), 46903 states have internal predecessors, (183473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:55,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46904 states to 46904 states and 183473 transitions. [2021-06-05 17:07:55,152 INFO L78 Accepts]: Start accepts. Automaton has 46904 states and 183473 transitions. Word has length 28 [2021-06-05 17:07:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:55,152 INFO L482 AbstractCegarLoop]: Abstraction has 46904 states and 183473 transitions. [2021-06-05 17:07:55,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:07:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 46904 states and 183473 transitions. [2021-06-05 17:07:55,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:55,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:55,221 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:55,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 17:07:55,421 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash 465457933, now seen corresponding path program 140 times [2021-06-05 17:07:55,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:55,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927162116] [2021-06-05 17:07:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:55,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:55,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927162116] [2021-06-05 17:07:55,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927162116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:55,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525352263] [2021-06-05 17:07:55,450 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:55,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:07:55,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:55,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:55,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525352263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:55,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:55,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:07:55,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275831855] [2021-06-05 17:07:55,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:55,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:55,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:55,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:55,540 INFO L87 Difference]: Start difference. First operand 46904 states and 183473 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:07:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:56,692 INFO L93 Difference]: Finished difference Result 68346 states and 256324 transitions. [2021-06-05 17:07:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:07:56,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:07:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:56,855 INFO L225 Difference]: With dead ends: 68346 [2021-06-05 17:07:56,855 INFO L226 Difference]: Without dead ends: 68338 [2021-06-05 17:07:56,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:07:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68338 states. [2021-06-05 17:07:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68338 to 46598. [2021-06-05 17:07:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46598 states, 46597 states have (on average 3.917119127840848) internal successors, (182526), 46597 states have internal predecessors, (182526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:07:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46598 states to 46598 states and 182526 transitions. [2021-06-05 17:07:58,163 INFO L78 Accepts]: Start accepts. Automaton has 46598 states and 182526 transitions. Word has length 28 [2021-06-05 17:07:58,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:07:58,163 INFO L482 AbstractCegarLoop]: Abstraction has 46598 states and 182526 transitions. [2021-06-05 17:07:58,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:07:58,163 INFO L276 IsEmpty]: Start isEmpty. Operand 46598 states and 182526 transitions. [2021-06-05 17:07:58,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:07:58,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:07:58,226 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:07:58,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:58,427 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:07:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:07:58,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1049634039, now seen corresponding path program 141 times [2021-06-05 17:07:58,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:07:58,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334458396] [2021-06-05 17:07:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:07:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:07:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:58,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:07:58,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334458396] [2021-06-05 17:07:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334458396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:58,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115427568] [2021-06-05 17:07:58,456 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:07:58,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:07:58,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:07:58,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:07:58,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:58,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115427568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:58,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:58,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-05 17:07:58,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500941424] [2021-06-05 17:07:58,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:07:58,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:58,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:07:58,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:07:58,551 INFO L87 Difference]: Start difference. First operand 46598 states and 182526 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:07:59,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:07:59,582 INFO L93 Difference]: Finished difference Result 66749 states and 251892 transitions. [2021-06-05 17:07:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 17:07:59,583 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 28 [2021-06-05 17:07:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:07:59,766 INFO L225 Difference]: With dead ends: 66749 [2021-06-05 17:07:59,767 INFO L226 Difference]: Without dead ends: 66725 [2021-06-05 17:07:59,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:07:59,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66725 states. [2021-06-05 17:08:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66725 to 46494. [2021-06-05 17:08:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46494 states, 46493 states have (on average 3.9171058008732498) internal successors, (182118), 46493 states have internal predecessors, (182118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46494 states to 46494 states and 182118 transitions. [2021-06-05 17:08:01,242 INFO L78 Accepts]: Start accepts. Automaton has 46494 states and 182118 transitions. Word has length 28 [2021-06-05 17:08:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:01,242 INFO L482 AbstractCegarLoop]: Abstraction has 46494 states and 182118 transitions. [2021-06-05 17:08:01,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 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 17:08:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 46494 states and 182118 transitions. [2021-06-05 17:08:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:01,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:01,533 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:01,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:01,741 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:01,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash 547492677, now seen corresponding path program 142 times [2021-06-05 17:08:01,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:01,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86499298] [2021-06-05 17:08:01,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:01,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:01,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86499298] [2021-06-05 17:08:01,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86499298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:01,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608999361] [2021-06-05 17:08:01,772 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:01,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:01,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608999361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:01,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:01,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:01,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335485025] [2021-06-05 17:08:01,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:01,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:01,881 INFO L87 Difference]: Start difference. First operand 46494 states and 182118 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:02,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:02,935 INFO L93 Difference]: Finished difference Result 67947 states and 255225 transitions. [2021-06-05 17:08:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:08:02,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:08:02,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:03,102 INFO L225 Difference]: With dead ends: 67947 [2021-06-05 17:08:03,102 INFO L226 Difference]: Without dead ends: 67947 [2021-06-05 17:08:03,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 524.5ms TimeCoverageRelationStatistics Valid=878, Invalid=3412, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 17:08:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67947 states. [2021-06-05 17:08:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67947 to 46590. [2021-06-05 17:08:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46590 states, 46589 states have (on average 3.9157741097684005) internal successors, (182432), 46589 states have internal predecessors, (182432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:04,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46590 states to 46590 states and 182432 transitions. [2021-06-05 17:08:04,569 INFO L78 Accepts]: Start accepts. Automaton has 46590 states and 182432 transitions. Word has length 28 [2021-06-05 17:08:04,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:04,569 INFO L482 AbstractCegarLoop]: Abstraction has 46590 states and 182432 transitions. [2021-06-05 17:08:04,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:04,569 INFO L276 IsEmpty]: Start isEmpty. Operand 46590 states and 182432 transitions. [2021-06-05 17:08:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:04,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:04,639 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:04,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:04,840 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2104435465, now seen corresponding path program 143 times [2021-06-05 17:08:04,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:04,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331080720] [2021-06-05 17:08:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:04,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331080720] [2021-06-05 17:08:04,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331080720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899831517] [2021-06-05 17:08:04,872 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:04,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:04,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:04,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:04,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:04,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899831517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:04,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:04,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 17:08:04,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049443705] [2021-06-05 17:08:04,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:04,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:04,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:04,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:04,986 INFO L87 Difference]: Start difference. First operand 46590 states and 182432 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:05,976 INFO L93 Difference]: Finished difference Result 67507 states and 253969 transitions. [2021-06-05 17:08:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 17:08:05,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:08:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:06,408 INFO L225 Difference]: With dead ends: 67507 [2021-06-05 17:08:06,408 INFO L226 Difference]: Without dead ends: 67499 [2021-06-05 17:08:06,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=716, Invalid=2590, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 17:08:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67499 states. [2021-06-05 17:08:07,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67499 to 46522. [2021-06-05 17:08:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46522 states, 46521 states have (on average 3.916940736441607) internal successors, (182220), 46521 states have internal predecessors, (182220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46522 states to 46522 states and 182220 transitions. [2021-06-05 17:08:07,735 INFO L78 Accepts]: Start accepts. Automaton has 46522 states and 182220 transitions. Word has length 28 [2021-06-05 17:08:07,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:07,735 INFO L482 AbstractCegarLoop]: Abstraction has 46522 states and 182220 transitions. [2021-06-05 17:08:07,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 46522 states and 182220 transitions. [2021-06-05 17:08:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:07,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:07,798 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:07,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:07,999 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:07,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:07,999 INFO L82 PathProgramCache]: Analyzing trace with hash 923074653, now seen corresponding path program 144 times [2021-06-05 17:08:07,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:07,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107244600] [2021-06-05 17:08:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:08:08,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107244600] [2021-06-05 17:08:08,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107244600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:08,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565499965] [2021-06-05 17:08:08,034 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:08,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:08:08,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:08,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:08,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:08,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565499965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:08,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:08,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 17:08:08,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618938757] [2021-06-05 17:08:08,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:08:08,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:08,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:08:08,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:08:08,130 INFO L87 Difference]: Start difference. First operand 46522 states and 182220 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:08:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:09,171 INFO L93 Difference]: Finished difference Result 66238 states and 250458 transitions. [2021-06-05 17:08:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:08:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-05 17:08:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:09,344 INFO L225 Difference]: With dead ends: 66238 [2021-06-05 17:08:09,344 INFO L226 Difference]: Without dead ends: 66214 [2021-06-05 17:08:09,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=487, Invalid=1675, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:08:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66214 states. [2021-06-05 17:08:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66214 to 46498. [2021-06-05 17:08:10,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46498 states, 46497 states have (on average 3.9170699184893647) internal successors, (182132), 46497 states have internal predecessors, (182132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46498 states to 46498 states and 182132 transitions. [2021-06-05 17:08:10,758 INFO L78 Accepts]: Start accepts. Automaton has 46498 states and 182132 transitions. Word has length 28 [2021-06-05 17:08:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:10,758 INFO L482 AbstractCegarLoop]: Abstraction has 46498 states and 182132 transitions. [2021-06-05 17:08:10,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 17:08:10,758 INFO L276 IsEmpty]: Start isEmpty. Operand 46498 states and 182132 transitions. [2021-06-05 17:08:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:10,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:10,821 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:11,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable483 [2021-06-05 17:08:11,021 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:11,021 INFO L82 PathProgramCache]: Analyzing trace with hash 100408761, now seen corresponding path program 145 times [2021-06-05 17:08:11,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:11,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052849097] [2021-06-05 17:08:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:11,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052849097] [2021-06-05 17:08:11,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052849097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747090832] [2021-06-05 17:08:11,056 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:11,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:11,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747090832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:11,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:11,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:08:11,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871137697] [2021-06-05 17:08:11,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:11,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:11,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:11,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:11,141 INFO L87 Difference]: Start difference. First operand 46498 states and 182132 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:12,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:12,714 INFO L93 Difference]: Finished difference Result 69780 states and 260558 transitions. [2021-06-05 17:08:12,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 17:08:12,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:08:12,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:12,892 INFO L225 Difference]: With dead ends: 69780 [2021-06-05 17:08:12,892 INFO L226 Difference]: Without dead ends: 69780 [2021-06-05 17:08:12,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2861 ImplicationChecksByTransitivity, 963.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=5889, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 17:08:12,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69780 states. [2021-06-05 17:08:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69780 to 51268. [2021-06-05 17:08:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51268 states, 51267 states have (on average 3.8675756334484173) internal successors, (198279), 51267 states have internal predecessors, (198279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51268 states to 51268 states and 198279 transitions. [2021-06-05 17:08:14,677 INFO L78 Accepts]: Start accepts. Automaton has 51268 states and 198279 transitions. Word has length 28 [2021-06-05 17:08:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:14,677 INFO L482 AbstractCegarLoop]: Abstraction has 51268 states and 198279 transitions. [2021-06-05 17:08:14,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 51268 states and 198279 transitions. [2021-06-05 17:08:14,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:14,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:14,750 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:14,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:14,952 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:14,953 INFO L82 PathProgramCache]: Analyzing trace with hash 181784849, now seen corresponding path program 146 times [2021-06-05 17:08:14,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:14,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702660131] [2021-06-05 17:08:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:14,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:14,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702660131] [2021-06-05 17:08:14,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702660131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:14,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259331896] [2021-06-05 17:08:14,987 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:15,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:15,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:15,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:15,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259331896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:15,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:15,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:08:15,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501031095] [2021-06-05 17:08:15,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:15,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:15,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:15,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:15,075 INFO L87 Difference]: Start difference. First operand 51268 states and 198279 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:16,233 INFO L93 Difference]: Finished difference Result 68981 states and 258379 transitions. [2021-06-05 17:08:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:08:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:08:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:16,408 INFO L225 Difference]: With dead ends: 68981 [2021-06-05 17:08:16,408 INFO L226 Difference]: Without dead ends: 68973 [2021-06-05 17:08:16,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 580.8ms TimeCoverageRelationStatistics Valid=1035, Invalid=4221, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 17:08:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68973 states. [2021-06-05 17:08:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68973 to 50106. [2021-06-05 17:08:17,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50106 states, 50105 states have (on average 3.885001496856601) internal successors, (194658), 50105 states have internal predecessors, (194658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50106 states to 50106 states and 194658 transitions. [2021-06-05 17:08:18,060 INFO L78 Accepts]: Start accepts. Automaton has 50106 states and 194658 transitions. Word has length 28 [2021-06-05 17:08:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:18,060 INFO L482 AbstractCegarLoop]: Abstraction has 50106 states and 194658 transitions. [2021-06-05 17:08:18,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 50106 states and 194658 transitions. [2021-06-05 17:08:18,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:18,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:18,129 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:18,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 17:08:18,329 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:18,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:18,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1333307123, now seen corresponding path program 147 times [2021-06-05 17:08:18,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:18,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017419148] [2021-06-05 17:08:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:18,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:18,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017419148] [2021-06-05 17:08:18,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017419148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:18,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931216397] [2021-06-05 17:08:18,363 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:18,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:18,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:18,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931216397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:18,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:18,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:08:18,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992841710] [2021-06-05 17:08:18,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:18,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:18,445 INFO L87 Difference]: Start difference. First operand 50106 states and 194658 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:19,702 INFO L93 Difference]: Finished difference Result 67179 states and 253388 transitions. [2021-06-05 17:08:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:08:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:08:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:19,877 INFO L225 Difference]: With dead ends: 67179 [2021-06-05 17:08:19,877 INFO L226 Difference]: Without dead ends: 67155 [2021-06-05 17:08:19,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 510.3ms TimeCoverageRelationStatistics Valid=814, Invalid=3218, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:08:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67155 states. [2021-06-05 17:08:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67155 to 50086. [2021-06-05 17:08:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.883278426674653) internal successors, (194494), 50085 states have internal predecessors, (194494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194494 transitions. [2021-06-05 17:08:21,285 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194494 transitions. Word has length 28 [2021-06-05 17:08:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:21,285 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194494 transitions. [2021-06-05 17:08:21,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:21,285 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194494 transitions. [2021-06-05 17:08:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:21,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:21,353 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:21,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 17:08:21,553 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1959694861, now seen corresponding path program 148 times [2021-06-05 17:08:21,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:21,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663368889] [2021-06-05 17:08:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:21,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:21,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:21,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663368889] [2021-06-05 17:08:21,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663368889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:21,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079118671] [2021-06-05 17:08:21,588 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:21,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:21,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:21,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:21,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079118671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:21,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:21,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 17:08:21,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671129661] [2021-06-05 17:08:21,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:08:21,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:21,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:08:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:08:21,682 INFO L87 Difference]: Start difference. First operand 50086 states and 194494 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:22,927 INFO L93 Difference]: Finished difference Result 68547 states and 257187 transitions. [2021-06-05 17:08:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:08:22,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:08:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:23,096 INFO L225 Difference]: With dead ends: 68547 [2021-06-05 17:08:23,096 INFO L226 Difference]: Without dead ends: 68507 [2021-06-05 17:08:23,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=722, Invalid=2818, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:08:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68507 states. [2021-06-05 17:08:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68507 to 50240. [2021-06-05 17:08:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50240 states, 50239 states have (on average 3.882621071279285) internal successors, (195059), 50239 states have internal predecessors, (195059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50240 states to 50240 states and 195059 transitions. [2021-06-05 17:08:24,542 INFO L78 Accepts]: Start accepts. Automaton has 50240 states and 195059 transitions. Word has length 28 [2021-06-05 17:08:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:24,542 INFO L482 AbstractCegarLoop]: Abstraction has 50240 states and 195059 transitions. [2021-06-05 17:08:24,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:08:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 50240 states and 195059 transitions. [2021-06-05 17:08:24,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:24,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:24,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:24,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-06-05 17:08:24,817 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 243917385, now seen corresponding path program 149 times [2021-06-05 17:08:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:24,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289298807] [2021-06-05 17:08:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:24,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:24,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289298807] [2021-06-05 17:08:24,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289298807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:24,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990359191] [2021-06-05 17:08:24,859 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:24,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:24,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:24,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:24,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990359191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:24,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:24,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:08:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120378377] [2021-06-05 17:08:24,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:08:24,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:24,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:08:24,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:08:24,972 INFO L87 Difference]: Start difference. First operand 50240 states and 195059 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:26,565 INFO L93 Difference]: Finished difference Result 67665 states and 254567 transitions. [2021-06-05 17:08:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 17:08:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:08:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:26,734 INFO L225 Difference]: With dead ends: 67665 [2021-06-05 17:08:26,735 INFO L226 Difference]: Without dead ends: 67665 [2021-06-05 17:08:26,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 988.6ms TimeCoverageRelationStatistics Valid=1250, Invalid=5392, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 17:08:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67665 states. [2021-06-05 17:08:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67665 to 51145. [2021-06-05 17:08:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51145 states, 51144 states have (on average 3.8739637103081495) internal successors, (198130), 51144 states have internal predecessors, (198130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51145 states to 51145 states and 198130 transitions. [2021-06-05 17:08:28,338 INFO L78 Accepts]: Start accepts. Automaton has 51145 states and 198130 transitions. Word has length 28 [2021-06-05 17:08:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:28,338 INFO L482 AbstractCegarLoop]: Abstraction has 51145 states and 198130 transitions. [2021-06-05 17:08:28,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 51145 states and 198130 transitions. [2021-06-05 17:08:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:28,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:28,418 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:28,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 17:08:28,618 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:28,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:28,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956539, now seen corresponding path program 150 times [2021-06-05 17:08:28,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:28,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987408102] [2021-06-05 17:08:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:28,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:28,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987408102] [2021-06-05 17:08:28,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987408102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:28,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294618940] [2021-06-05 17:08:28,663 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:28,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:08:28,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:28,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:28,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:28,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294618940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:28,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:28,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:08:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358126633] [2021-06-05 17:08:28,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:08:28,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:08:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:08:28,780 INFO L87 Difference]: Start difference. First operand 51145 states and 198130 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:29,938 INFO L93 Difference]: Finished difference Result 67040 states and 252804 transitions. [2021-06-05 17:08:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:08:29,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:08:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:30,380 INFO L225 Difference]: With dead ends: 67040 [2021-06-05 17:08:30,381 INFO L226 Difference]: Without dead ends: 67032 [2021-06-05 17:08:30,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=973, Invalid=3857, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 17:08:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67032 states. [2021-06-05 17:08:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67032 to 51069. [2021-06-05 17:08:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51069 states, 51068 states have (on average 3.875107699537871) internal successors, (197894), 51068 states have internal predecessors, (197894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51069 states to 51069 states and 197894 transitions. [2021-06-05 17:08:31,662 INFO L78 Accepts]: Start accepts. Automaton has 51069 states and 197894 transitions. Word has length 28 [2021-06-05 17:08:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:31,662 INFO L482 AbstractCegarLoop]: Abstraction has 51069 states and 197894 transitions. [2021-06-05 17:08:31,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 51069 states and 197894 transitions. [2021-06-05 17:08:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:31,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:31,731 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:31,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 17:08:31,931 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash 619499361, now seen corresponding path program 151 times [2021-06-05 17:08:31,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:31,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252626749] [2021-06-05 17:08:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:31,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252626749] [2021-06-05 17:08:31,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252626749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:31,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201762794] [2021-06-05 17:08:31,966 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:32,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201762794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:32,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:32,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:32,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541878608] [2021-06-05 17:08:32,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:32,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:32,062 INFO L87 Difference]: Start difference. First operand 51069 states and 197894 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:33,323 INFO L93 Difference]: Finished difference Result 66517 states and 251558 transitions. [2021-06-05 17:08:33,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:08:33,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 17:08:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:33,500 INFO L225 Difference]: With dead ends: 66517 [2021-06-05 17:08:33,500 INFO L226 Difference]: Without dead ends: 66493 [2021-06-05 17:08:33,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:08:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66493 states. [2021-06-05 17:08:34,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66493 to 51055. [2021-06-05 17:08:34,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51055 states, 51054 states have (on average 3.8750930387432914) internal successors, (197839), 51054 states have internal predecessors, (197839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51055 states to 51055 states and 197839 transitions. [2021-06-05 17:08:34,925 INFO L78 Accepts]: Start accepts. Automaton has 51055 states and 197839 transitions. Word has length 28 [2021-06-05 17:08:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:34,925 INFO L482 AbstractCegarLoop]: Abstraction has 51055 states and 197839 transitions. [2021-06-05 17:08:34,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 51055 states and 197839 transitions. [2021-06-05 17:08:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:34,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:34,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:35,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:35,195 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085277, now seen corresponding path program 152 times [2021-06-05 17:08:35,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:35,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935525328] [2021-06-05 17:08:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:35,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935525328] [2021-06-05 17:08:35,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935525328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018601909] [2021-06-05 17:08:35,230 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:35,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:35,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:35,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018601909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:35,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:35,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 17:08:35,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785411107] [2021-06-05 17:08:35,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:08:35,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:35,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:08:35,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:08:35,318 INFO L87 Difference]: Start difference. First operand 51055 states and 197839 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 17:08:36,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:36,557 INFO L93 Difference]: Finished difference Result 66299 states and 250865 transitions. [2021-06-05 17:08:36,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:08:36,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 28 [2021-06-05 17:08:36,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:36,725 INFO L225 Difference]: With dead ends: 66299 [2021-06-05 17:08:36,725 INFO L226 Difference]: Without dead ends: 66259 [2021-06-05 17:08:36,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=696, Invalid=2726, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:08:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66259 states. [2021-06-05 17:08:37,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66259 to 51404. [2021-06-05 17:08:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51404 states, 51403 states have (on average 3.87658307880863) internal successors, (199268), 51403 states have internal predecessors, (199268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51404 states to 51404 states and 199268 transitions. [2021-06-05 17:08:38,205 INFO L78 Accepts]: Start accepts. Automaton has 51404 states and 199268 transitions. Word has length 28 [2021-06-05 17:08:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:38,205 INFO L482 AbstractCegarLoop]: Abstraction has 51404 states and 199268 transitions. [2021-06-05 17:08:38,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 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 17:08:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 51404 states and 199268 transitions. [2021-06-05 17:08:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:38,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:38,278 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:38,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:38,479 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:38,479 INFO L82 PathProgramCache]: Analyzing trace with hash 806750187, now seen corresponding path program 153 times [2021-06-05 17:08:38,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:38,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159763144] [2021-06-05 17:08:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:38,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:38,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159763144] [2021-06-05 17:08:38,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159763144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:38,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244231971] [2021-06-05 17:08:38,514 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:38,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:38,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:38,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:38,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244231971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:38,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:38,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679456631] [2021-06-05 17:08:38,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:38,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:38,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:38,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:38,618 INFO L87 Difference]: Start difference. First operand 51404 states and 199268 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:08:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:39,976 INFO L93 Difference]: Finished difference Result 80562 states and 301306 transitions. [2021-06-05 17:08:39,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 17:08:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-05 17:08:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:40,178 INFO L225 Difference]: With dead ends: 80562 [2021-06-05 17:08:40,178 INFO L226 Difference]: Without dead ends: 80562 [2021-06-05 17:08:40,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=901, Invalid=3131, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:08:40,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80562 states. [2021-06-05 17:08:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80562 to 52570. [2021-06-05 17:08:41,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52570 states, 52569 states have (on average 3.888660617474177) internal successors, (204423), 52569 states have internal predecessors, (204423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52570 states to 52570 states and 204423 transitions. [2021-06-05 17:08:41,757 INFO L78 Accepts]: Start accepts. Automaton has 52570 states and 204423 transitions. Word has length 28 [2021-06-05 17:08:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:41,757 INFO L482 AbstractCegarLoop]: Abstraction has 52570 states and 204423 transitions. [2021-06-05 17:08:41,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 17:08:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 52570 states and 204423 transitions. [2021-06-05 17:08:42,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:42,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:42,076 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:42,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:42,291 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:42,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash 132028309, now seen corresponding path program 154 times [2021-06-05 17:08:42,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:42,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606977612] [2021-06-05 17:08:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:42,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:42,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606977612] [2021-06-05 17:08:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606977612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763134287] [2021-06-05 17:08:42,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:42,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:08:42,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:42,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:42,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763134287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:42,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:42,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676842217] [2021-06-05 17:08:42,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:42,431 INFO L87 Difference]: Start difference. First operand 52570 states and 204423 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:43,495 INFO L93 Difference]: Finished difference Result 73577 states and 279250 transitions. [2021-06-05 17:08:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:08:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 17:08:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:43,684 INFO L225 Difference]: With dead ends: 73577 [2021-06-05 17:08:43,685 INFO L226 Difference]: Without dead ends: 73577 [2021-06-05 17:08:43,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:08:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73577 states. [2021-06-05 17:08:45,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73577 to 52600. [2021-06-05 17:08:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52600 states, 52599 states have (on average 3.888476967242723) internal successors, (204530), 52599 states have internal predecessors, (204530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52600 states to 52600 states and 204530 transitions. [2021-06-05 17:08:45,444 INFO L78 Accepts]: Start accepts. Automaton has 52600 states and 204530 transitions. Word has length 28 [2021-06-05 17:08:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:45,444 INFO L482 AbstractCegarLoop]: Abstraction has 52600 states and 204530 transitions. [2021-06-05 17:08:45,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 52600 states and 204530 transitions. [2021-06-05 17:08:45,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:45,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:45,517 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:45,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:45,717 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:45,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:45,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1785388485, now seen corresponding path program 155 times [2021-06-05 17:08:45,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:45,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856058256] [2021-06-05 17:08:45,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:45,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:45,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856058256] [2021-06-05 17:08:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856058256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789202185] [2021-06-05 17:08:45,752 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:45,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:08:45,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:45,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:45,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:45,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789202185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:45,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:45,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:08:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891502818] [2021-06-05 17:08:45,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:08:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:08:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:08:45,874 INFO L87 Difference]: Start difference. First operand 52600 states and 204530 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:47,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:47,575 INFO L93 Difference]: Finished difference Result 74613 states and 282201 transitions. [2021-06-05 17:08:47,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:08:47,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:08:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:47,765 INFO L225 Difference]: With dead ends: 74613 [2021-06-05 17:08:47,765 INFO L226 Difference]: Without dead ends: 74613 [2021-06-05 17:08:47,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2900 ImplicationChecksByTransitivity, 803.1ms TimeCoverageRelationStatistics Valid=1557, Invalid=5925, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 17:08:47,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74613 states. [2021-06-05 17:08:49,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74613 to 52864. [2021-06-05 17:08:49,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52864 states, 52863 states have (on average 3.8852883869625257) internal successors, (205388), 52863 states have internal predecessors, (205388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52864 states to 52864 states and 205388 transitions. [2021-06-05 17:08:49,296 INFO L78 Accepts]: Start accepts. Automaton has 52864 states and 205388 transitions. Word has length 28 [2021-06-05 17:08:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:49,296 INFO L482 AbstractCegarLoop]: Abstraction has 52864 states and 205388 transitions. [2021-06-05 17:08:49,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 52864 states and 205388 transitions. [2021-06-05 17:08:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:49,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:49,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:49,568 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash -866539657, now seen corresponding path program 156 times [2021-06-05 17:08:49,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:49,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383382615] [2021-06-05 17:08:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:49,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:49,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383382615] [2021-06-05 17:08:49,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383382615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:49,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168234384] [2021-06-05 17:08:49,602 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:49,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:08:49,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:49,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:49,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:49,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168234384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:49,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:49,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:08:49,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622248951] [2021-06-05 17:08:49,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:08:49,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:49,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:08:49,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:08:49,709 INFO L87 Difference]: Start difference. First operand 52864 states and 205388 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:50,411 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 17:08:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:51,109 INFO L93 Difference]: Finished difference Result 73622 states and 279382 transitions. [2021-06-05 17:08:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:08:51,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:08:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:51,292 INFO L225 Difference]: With dead ends: 73622 [2021-06-05 17:08:51,292 INFO L226 Difference]: Without dead ends: 73618 [2021-06-05 17:08:51,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=1139, Invalid=3831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:08:51,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73618 states. [2021-06-05 17:08:52,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73618 to 52500. [2021-06-05 17:08:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52500 states, 52499 states have (on average 3.8886835939732185) internal successors, (204152), 52499 states have internal predecessors, (204152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52500 states to 52500 states and 204152 transitions. [2021-06-05 17:08:53,023 INFO L78 Accepts]: Start accepts. Automaton has 52500 states and 204152 transitions. Word has length 28 [2021-06-05 17:08:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:53,023 INFO L482 AbstractCegarLoop]: Abstraction has 52500 states and 204152 transitions. [2021-06-05 17:08:53,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:53,024 INFO L276 IsEmpty]: Start isEmpty. Operand 52500 states and 204152 transitions. [2021-06-05 17:08:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:53,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:53,118 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:53,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-06-05 17:08:53,318 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:53,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:53,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1338899459, now seen corresponding path program 157 times [2021-06-05 17:08:53,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:53,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221300479] [2021-06-05 17:08:53,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:53,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:53,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221300479] [2021-06-05 17:08:53,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221300479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:53,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216322960] [2021-06-05 17:08:53,356 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:53,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216322960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:53,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:53,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:53,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067578245] [2021-06-05 17:08:53,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:53,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:53,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:53,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:53,460 INFO L87 Difference]: Start difference. First operand 52500 states and 204152 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:54,326 INFO L93 Difference]: Finished difference Result 67618 states and 258391 transitions. [2021-06-05 17:08:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:08:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 17:08:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:54,514 INFO L225 Difference]: With dead ends: 67618 [2021-06-05 17:08:54,514 INFO L226 Difference]: Without dead ends: 67618 [2021-06-05 17:08:54,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=608, Invalid=2148, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:08:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67618 states. [2021-06-05 17:08:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67618 to 52516. [2021-06-05 17:08:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52516 states, 52515 states have (on average 3.8903170522707797) internal successors, (204300), 52515 states have internal predecessors, (204300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52516 states to 52516 states and 204300 transitions. [2021-06-05 17:08:56,163 INFO L78 Accepts]: Start accepts. Automaton has 52516 states and 204300 transitions. Word has length 28 [2021-06-05 17:08:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:56,163 INFO L482 AbstractCegarLoop]: Abstraction has 52516 states and 204300 transitions. [2021-06-05 17:08:56,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 52516 states and 204300 transitions. [2021-06-05 17:08:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:56,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:56,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:56,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 17:08:56,441 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1775748157, now seen corresponding path program 158 times [2021-06-05 17:08:56,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:56,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324632324] [2021-06-05 17:08:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:56,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324632324] [2021-06-05 17:08:56,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324632324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:56,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419023726] [2021-06-05 17:08:56,476 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:56,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:08:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:56,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:56,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419023726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:56,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:56,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:56,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160487542] [2021-06-05 17:08:56,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:56,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:56,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:56,573 INFO L87 Difference]: Start difference. First operand 52516 states and 204300 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:57,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:08:57,300 INFO L93 Difference]: Finished difference Result 66808 states and 256162 transitions. [2021-06-05 17:08:57,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:08:57,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 17:08:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:08:57,470 INFO L225 Difference]: With dead ends: 66808 [2021-06-05 17:08:57,470 INFO L226 Difference]: Without dead ends: 66796 [2021-06-05 17:08:57,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:08:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66796 states. [2021-06-05 17:08:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66796 to 52450. [2021-06-05 17:08:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52450 states, 52449 states have (on average 3.8913420656256554) internal successors, (204097), 52449 states have internal predecessors, (204097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:08:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52450 states to 52450 states and 204097 transitions. [2021-06-05 17:08:59,145 INFO L78 Accepts]: Start accepts. Automaton has 52450 states and 204097 transitions. Word has length 28 [2021-06-05 17:08:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:08:59,145 INFO L482 AbstractCegarLoop]: Abstraction has 52450 states and 204097 transitions. [2021-06-05 17:08:59,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:08:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 52450 states and 204097 transitions. [2021-06-05 17:08:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:08:59,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:08:59,219 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:08:59,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 17:08:59,419 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:08:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:08:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash 517999999, now seen corresponding path program 159 times [2021-06-05 17:08:59,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:08:59,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806008242] [2021-06-05 17:08:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:08:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:08:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:59,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:08:59,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806008242] [2021-06-05 17:08:59,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806008242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:59,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535766620] [2021-06-05 17:08:59,456 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:08:59,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:08:59,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:08:59,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:08:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:08:59,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:08:59,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535766620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:08:59,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:08:59,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:08:59,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686760391] [2021-06-05 17:08:59,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:08:59,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:08:59,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:08:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:08:59,561 INFO L87 Difference]: Start difference. First operand 52450 states and 204097 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:09:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:00,179 INFO L93 Difference]: Finished difference Result 57072 states and 219303 transitions. [2021-06-05 17:09:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:09:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 28 [2021-06-05 17:09:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:00,323 INFO L225 Difference]: With dead ends: 57072 [2021-06-05 17:09:00,323 INFO L226 Difference]: Without dead ends: 57072 [2021-06-05 17:09:00,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:09:00,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57072 states. [2021-06-05 17:09:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57072 to 52658. [2021-06-05 17:09:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52658 states, 52657 states have (on average 3.8891125586341797) internal successors, (204789), 52657 states have internal predecessors, (204789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52658 states to 52658 states and 204789 transitions. [2021-06-05 17:09:01,623 INFO L78 Accepts]: Start accepts. Automaton has 52658 states and 204789 transitions. Word has length 28 [2021-06-05 17:09:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:01,623 INFO L482 AbstractCegarLoop]: Abstraction has 52658 states and 204789 transitions. [2021-06-05 17:09:01,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 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 17:09:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 52658 states and 204789 transitions. [2021-06-05 17:09:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:01,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:01,928 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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 17:09:02,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable498,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:02,141 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash -480567967, now seen corresponding path program 160 times [2021-06-05 17:09:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:02,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393584223] [2021-06-05 17:09:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:02,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393584223] [2021-06-05 17:09:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393584223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911995091] [2021-06-05 17:09:02,172 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:02,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:02,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911995091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:02,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:02,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:09:02,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061399251] [2021-06-05 17:09:02,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:09:02,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:09:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:09:02,281 INFO L87 Difference]: Start difference. First operand 52658 states and 204789 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:02,830 INFO L93 Difference]: Finished difference Result 56883 states and 218795 transitions. [2021-06-05 17:09:02,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:09:02,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 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 28 [2021-06-05 17:09:02,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:02,980 INFO L225 Difference]: With dead ends: 56883 [2021-06-05 17:09:02,980 INFO L226 Difference]: Without dead ends: 56879 [2021-06-05 17:09:02,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:09:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56879 states. [2021-06-05 17:09:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56879 to 52598. [2021-06-05 17:09:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52598 states, 52597 states have (on average 3.889898663421868) internal successors, (204597), 52597 states have internal predecessors, (204597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52598 states to 52598 states and 204597 transitions. [2021-06-05 17:09:04,289 INFO L78 Accepts]: Start accepts. Automaton has 52598 states and 204597 transitions. Word has length 28 [2021-06-05 17:09:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:04,289 INFO L482 AbstractCegarLoop]: Abstraction has 52598 states and 204597 transitions. [2021-06-05 17:09:04,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 52598 states and 204597 transitions. [2021-06-05 17:09:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:04,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:04,362 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:04,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 17:09:04,562 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash -510371023, now seen corresponding path program 87 times [2021-06-05 17:09:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:04,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66570893] [2021-06-05 17:09:04,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:04,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:04,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66570893] [2021-06-05 17:09:04,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66570893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:04,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623074393] [2021-06-05 17:09:04,597 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:04,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:09:04,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:04,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:04,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623074393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:04,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:04,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:09:04,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255576714] [2021-06-05 17:09:04,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:09:04,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:04,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:09:04,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:09:04,668 INFO L87 Difference]: Start difference. First operand 52598 states and 204597 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 17:09:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:05,398 INFO L93 Difference]: Finished difference Result 56952 states and 218997 transitions. [2021-06-05 17:09:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:09:05,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-05 17:09:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:05,545 INFO L225 Difference]: With dead ends: 56952 [2021-06-05 17:09:05,545 INFO L226 Difference]: Without dead ends: 56952 [2021-06-05 17:09:05,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=275, Invalid=781, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:09:05,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56952 states. [2021-06-05 17:09:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56952 to 52718. [2021-06-05 17:09:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52718 states, 52717 states have (on average 3.8880247358537092) internal successors, (204965), 52717 states have internal predecessors, (204965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52718 states to 52718 states and 204965 transitions. [2021-06-05 17:09:06,821 INFO L78 Accepts]: Start accepts. Automaton has 52718 states and 204965 transitions. Word has length 28 [2021-06-05 17:09:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:06,821 INFO L482 AbstractCegarLoop]: Abstraction has 52718 states and 204965 transitions. [2021-06-05 17:09:06,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 17:09:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 52718 states and 204965 transitions. [2021-06-05 17:09:06,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:06,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:06,895 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:07,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:07,101 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:07,101 INFO L82 PathProgramCache]: Analyzing trace with hash 394977929, now seen corresponding path program 88 times [2021-06-05 17:09:07,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:07,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464301383] [2021-06-05 17:09:07,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:07,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464301383] [2021-06-05 17:09:07,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464301383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:07,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404926235] [2021-06-05 17:09:07,130 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:07,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:07,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 17:09:07,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404926235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:07,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:07,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 17:09:07,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668401505] [2021-06-05 17:09:07,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:09:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:09:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:09:07,193 INFO L87 Difference]: Start difference. First operand 52718 states and 204965 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 17:09:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:07,650 INFO L93 Difference]: Finished difference Result 57132 states and 219636 transitions. [2021-06-05 17:09:07,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:09:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 28 [2021-06-05 17:09:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:08,113 INFO L225 Difference]: With dead ends: 57132 [2021-06-05 17:09:08,113 INFO L226 Difference]: Without dead ends: 57120 [2021-06-05 17:09:08,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:09:08,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57120 states. [2021-06-05 17:09:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57120 to 52852. [2021-06-05 17:09:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.8863976083707024) internal successors, (205400), 52851 states have internal predecessors, (205400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205400 transitions. [2021-06-05 17:09:09,399 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205400 transitions. Word has length 28 [2021-06-05 17:09:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:09,399 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205400 transitions. [2021-06-05 17:09:09,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 17:09:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205400 transitions. [2021-06-05 17:09:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:09,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:09,475 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:09,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 17:09:09,675 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash -597515635, now seen corresponding path program 89 times [2021-06-05 17:09:09,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:09,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929790737] [2021-06-05 17:09:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:09,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:09,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929790737] [2021-06-05 17:09:09,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929790737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:09,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626616319] [2021-06-05 17:09:09,710 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:09,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:09:09,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:09,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:09:09,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:09,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626616319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:09,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:09,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 17:09:09,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007763362] [2021-06-05 17:09:09,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:09:09,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:09:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:09:09,775 INFO L87 Difference]: Start difference. First operand 52852 states and 205400 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 17:09:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:10,250 INFO L93 Difference]: Finished difference Result 57096 states and 219552 transitions. [2021-06-05 17:09:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:09:10,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 28 [2021-06-05 17:09:10,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:10,391 INFO L225 Difference]: With dead ends: 57096 [2021-06-05 17:09:10,391 INFO L226 Difference]: Without dead ends: 57076 [2021-06-05 17:09:10,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:09:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57076 states. [2021-06-05 17:09:11,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57076 to 52852. [2021-06-05 17:09:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52852 states, 52851 states have (on average 3.886321923899264) internal successors, (205396), 52851 states have internal predecessors, (205396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52852 states to 52852 states and 205396 transitions. [2021-06-05 17:09:11,711 INFO L78 Accepts]: Start accepts. Automaton has 52852 states and 205396 transitions. Word has length 28 [2021-06-05 17:09:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:11,711 INFO L482 AbstractCegarLoop]: Abstraction has 52852 states and 205396 transitions. [2021-06-05 17:09:11,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 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 17:09:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 52852 states and 205396 transitions. [2021-06-05 17:09:12,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:12,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:12,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:12,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-05 17:09:12,231 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash 970045237, now seen corresponding path program 161 times [2021-06-05 17:09:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:12,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556049160] [2021-06-05 17:09:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:12,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:12,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556049160] [2021-06-05 17:09:12,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556049160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:12,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041450030] [2021-06-05 17:09:12,263 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:12,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:09:12,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:12,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:12,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:12,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041450030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:12,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:12,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:09:12,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253374864] [2021-06-05 17:09:12,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:12,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:12,341 INFO L87 Difference]: Start difference. First operand 52852 states and 205396 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:12,829 INFO L93 Difference]: Finished difference Result 57813 states and 222961 transitions. [2021-06-05 17:09:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:09:12,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:09:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:12,973 INFO L225 Difference]: With dead ends: 57813 [2021-06-05 17:09:12,973 INFO L226 Difference]: Without dead ends: 57800 [2021-06-05 17:09:12,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:09:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57800 states. [2021-06-05 17:09:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57800 to 55585. [2021-06-05 17:09:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 3.8929188255613125) internal successors, (216384), 55584 states have internal predecessors, (216384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 216384 transitions. [2021-06-05 17:09:14,276 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 216384 transitions. Word has length 28 [2021-06-05 17:09:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:14,276 INFO L482 AbstractCegarLoop]: Abstraction has 55585 states and 216384 transitions. [2021-06-05 17:09:14,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 216384 transitions. [2021-06-05 17:09:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:14,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:14,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:14,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 17:09:14,566 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash 287300907, now seen corresponding path program 162 times [2021-06-05 17:09:14,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:14,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140063184] [2021-06-05 17:09:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:14,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:14,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140063184] [2021-06-05 17:09:14,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140063184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:14,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453671346] [2021-06-05 17:09:14,597 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:14,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:09:14,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:14,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:14,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:14,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453671346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:14,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:14,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:09:14,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91321186] [2021-06-05 17:09:14,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:14,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:14,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:14,678 INFO L87 Difference]: Start difference. First operand 55585 states and 216384 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:15,374 INFO L93 Difference]: Finished difference Result 61541 states and 235789 transitions. [2021-06-05 17:09:15,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:09:15,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:09:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:15,528 INFO L225 Difference]: With dead ends: 61541 [2021-06-05 17:09:15,528 INFO L226 Difference]: Without dead ends: 61541 [2021-06-05 17:09:15,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:09:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61541 states. [2021-06-05 17:09:16,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61541 to 49164. [2021-06-05 17:09:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49164 states, 49163 states have (on average 3.882350548176474) internal successors, (190868), 49163 states have internal predecessors, (190868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49164 states to 49164 states and 190868 transitions. [2021-06-05 17:09:16,766 INFO L78 Accepts]: Start accepts. Automaton has 49164 states and 190868 transitions. Word has length 28 [2021-06-05 17:09:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:16,766 INFO L482 AbstractCegarLoop]: Abstraction has 49164 states and 190868 transitions. [2021-06-05 17:09:16,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 49164 states and 190868 transitions. [2021-06-05 17:09:16,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:16,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:16,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:17,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-05 17:09:17,034 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:17,035 INFO L82 PathProgramCache]: Analyzing trace with hash -32817557, now seen corresponding path program 163 times [2021-06-05 17:09:17,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:17,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560724456] [2021-06-05 17:09:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:17,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:17,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560724456] [2021-06-05 17:09:17,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560724456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:17,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988219532] [2021-06-05 17:09:17,066 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:17,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988219532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:17,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:17,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:09:17,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57221558] [2021-06-05 17:09:17,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:17,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:17,146 INFO L87 Difference]: Start difference. First operand 49164 states and 190868 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:17,637 INFO L93 Difference]: Finished difference Result 54122 states and 207592 transitions. [2021-06-05 17:09:17,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:09:17,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:09:17,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:17,769 INFO L225 Difference]: With dead ends: 54122 [2021-06-05 17:09:17,769 INFO L226 Difference]: Without dead ends: 54122 [2021-06-05 17:09:17,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:09:17,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54122 states. [2021-06-05 17:09:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54122 to 49997. [2021-06-05 17:09:18,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49997 states, 49996 states have (on average 3.880830466437315) internal successors, (194026), 49996 states have internal predecessors, (194026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49997 states to 49997 states and 194026 transitions. [2021-06-05 17:09:19,332 INFO L78 Accepts]: Start accepts. Automaton has 49997 states and 194026 transitions. Word has length 28 [2021-06-05 17:09:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:19,332 INFO L482 AbstractCegarLoop]: Abstraction has 49997 states and 194026 transitions. [2021-06-05 17:09:19,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 49997 states and 194026 transitions. [2021-06-05 17:09:19,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:19,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:19,406 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:19,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:19,608 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:19,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:19,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1041987733, now seen corresponding path program 164 times [2021-06-05 17:09:19,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:19,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616477488] [2021-06-05 17:09:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:19,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:19,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616477488] [2021-06-05 17:09:19,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616477488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:19,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501140315] [2021-06-05 17:09:19,648 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:09:19,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:19,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:19,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501140315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:19,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:19,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 17:09:19,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576247118] [2021-06-05 17:09:19,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:09:19,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:09:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:09:19,729 INFO L87 Difference]: Start difference. First operand 49997 states and 194026 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:20,190 INFO L93 Difference]: Finished difference Result 51830 states and 200167 transitions. [2021-06-05 17:09:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:09:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-05 17:09:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:20,319 INFO L225 Difference]: With dead ends: 51830 [2021-06-05 17:09:20,319 INFO L226 Difference]: Without dead ends: 51830 [2021-06-05 17:09:20,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:09:20,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51830 states. [2021-06-05 17:09:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51830 to 50005. [2021-06-05 17:09:21,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50005 states, 50004 states have (on average 3.880689544836413) internal successors, (194050), 50004 states have internal predecessors, (194050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50005 states to 50005 states and 194050 transitions. [2021-06-05 17:09:21,471 INFO L78 Accepts]: Start accepts. Automaton has 50005 states and 194050 transitions. Word has length 28 [2021-06-05 17:09:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:21,471 INFO L482 AbstractCegarLoop]: Abstraction has 50005 states and 194050 transitions. [2021-06-05 17:09:21,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 17:09:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 50005 states and 194050 transitions. [2021-06-05 17:09:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:09:21,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:21,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:21,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:21,741 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:21,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1139256197, now seen corresponding path program 165 times [2021-06-05 17:09:21,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:21,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547927420] [2021-06-05 17:09:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:21,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:21,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547927420] [2021-06-05 17:09:21,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547927420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:21,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089570390] [2021-06-05 17:09:21,776 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:21,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:09:21,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:21,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 17:09:21,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:21,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089570390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:21,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:21,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 17:09:21,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817556904] [2021-06-05 17:09:21,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 17:09:21,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:21,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 17:09:21,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 17:09:21,858 INFO L87 Difference]: Start difference. First operand 50005 states and 194050 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) 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 17:09:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:22,551 INFO L93 Difference]: Finished difference Result 51550 states and 199245 transitions. [2021-06-05 17:09:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:09:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 28 [2021-06-05 17:09:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:22,689 INFO L225 Difference]: With dead ends: 51550 [2021-06-05 17:09:22,689 INFO L226 Difference]: Without dead ends: 51550 [2021-06-05 17:09:22,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:09:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51550 states. [2021-06-05 17:09:23,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51550 to 49899. [2021-06-05 17:09:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49899 states, 49898 states have (on average 3.8804360896228305) internal successors, (193626), 49898 states have internal predecessors, (193626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49899 states to 49899 states and 193626 transitions. [2021-06-05 17:09:23,888 INFO L78 Accepts]: Start accepts. Automaton has 49899 states and 193626 transitions. Word has length 28 [2021-06-05 17:09:23,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:23,888 INFO L482 AbstractCegarLoop]: Abstraction has 49899 states and 193626 transitions. [2021-06-05 17:09:23,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) 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 17:09:23,888 INFO L276 IsEmpty]: Start isEmpty. Operand 49899 states and 193626 transitions. [2021-06-05 17:09:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:23,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:23,964 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:24,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:24,164 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:24,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:24,165 INFO L82 PathProgramCache]: Analyzing trace with hash -993746325, now seen corresponding path program 166 times [2021-06-05 17:09:24,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:24,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869502502] [2021-06-05 17:09:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:24,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:24,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869502502] [2021-06-05 17:09:24,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869502502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:24,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031352174] [2021-06-05 17:09:24,376 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:24,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:24,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:24,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:09:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:24,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:24,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:24,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:09:24,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:24,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:24,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:24,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:09:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:24,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031352174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:24,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:24,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:09:24,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335338836] [2021-06-05 17:09:24,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:09:24,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:09:24,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:09:24,650 INFO L87 Difference]: Start difference. First operand 49899 states and 193626 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:09:25,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:25,801 INFO L93 Difference]: Finished difference Result 53034 states and 202923 transitions. [2021-06-05 17:09:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:09:25,802 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:09:25,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:26,165 INFO L225 Difference]: With dead ends: 53034 [2021-06-05 17:09:26,165 INFO L226 Difference]: Without dead ends: 53004 [2021-06-05 17:09:26,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 782.2ms TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:09:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53004 states. [2021-06-05 17:09:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53004 to 49956. [2021-06-05 17:09:26,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49956 states, 49955 states have (on average 3.8796717045340805) internal successors, (193809), 49955 states have internal predecessors, (193809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49956 states to 49956 states and 193809 transitions. [2021-06-05 17:09:27,325 INFO L78 Accepts]: Start accepts. Automaton has 49956 states and 193809 transitions. Word has length 30 [2021-06-05 17:09:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:27,325 INFO L482 AbstractCegarLoop]: Abstraction has 49956 states and 193809 transitions. [2021-06-05 17:09:27,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:09:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 49956 states and 193809 transitions. [2021-06-05 17:09:27,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:27,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:27,401 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:27,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:27,601 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1272822955, now seen corresponding path program 167 times [2021-06-05 17:09:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:27,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851419860] [2021-06-05 17:09:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:27,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851419860] [2021-06-05 17:09:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851419860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707633188] [2021-06-05 17:09:27,807 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:27,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:09:27,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:27,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:09:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:28,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:28,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:28,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:28,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:09:28,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:28,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:28,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:28,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-06-05 17:09:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:28,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707633188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:28,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:28,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:09:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076101864] [2021-06-05 17:09:28,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:09:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:28,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:09:28,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:28,123 INFO L87 Difference]: Start difference. First operand 49956 states and 193809 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 17:09:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:29,853 INFO L93 Difference]: Finished difference Result 53044 states and 202956 transitions. [2021-06-05 17:09:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:09:29,853 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 17:09:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:29,980 INFO L225 Difference]: With dead ends: 53044 [2021-06-05 17:09:29,980 INFO L226 Difference]: Without dead ends: 53029 [2021-06-05 17:09:29,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1072.7ms TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 17:09:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53029 states. [2021-06-05 17:09:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53029 to 49948. [2021-06-05 17:09:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49948 states, 49947 states have (on average 3.8798726650249264) internal successors, (193788), 49947 states have internal predecessors, (193788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49948 states to 49948 states and 193788 transitions. [2021-06-05 17:09:31,143 INFO L78 Accepts]: Start accepts. Automaton has 49948 states and 193788 transitions. Word has length 30 [2021-06-05 17:09:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:31,143 INFO L482 AbstractCegarLoop]: Abstraction has 49948 states and 193788 transitions. [2021-06-05 17:09:31,143 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 17:09:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 49948 states and 193788 transitions. [2021-06-05 17:09:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:31,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:31,213 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:31,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:31,415 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1430715033, now seen corresponding path program 168 times [2021-06-05 17:09:31,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:31,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453480174] [2021-06-05 17:09:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:31,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453480174] [2021-06-05 17:09:31,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453480174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:31,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110072457] [2021-06-05 17:09:31,609 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:31,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:09:31,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:31,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:09:31,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:31,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:31,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:31,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:31,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:09:31,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:31,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:31,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:31,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:09:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:31,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110072457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:31,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:31,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 17:09:31,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278822584] [2021-06-05 17:09:31,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:09:31,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:31,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:09:31,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:09:31,864 INFO L87 Difference]: Start difference. First operand 49948 states and 193788 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 17:09:33,195 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-06-05 17:09:33,956 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 17:09:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:35,367 INFO L93 Difference]: Finished difference Result 63314 states and 238515 transitions. [2021-06-05 17:09:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:09:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:09:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:35,524 INFO L225 Difference]: With dead ends: 63314 [2021-06-05 17:09:35,524 INFO L226 Difference]: Without dead ends: 63299 [2021-06-05 17:09:35,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2831.3ms TimeCoverageRelationStatistics Valid=514, Invalid=3026, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 17:09:35,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63299 states. [2021-06-05 17:09:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63299 to 50006. [2021-06-05 17:09:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50006 states, 50005 states have (on average 3.8794120587941205) internal successors, (193990), 50005 states have internal predecessors, (193990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50006 states to 50006 states and 193990 transitions. [2021-06-05 17:09:36,729 INFO L78 Accepts]: Start accepts. Automaton has 50006 states and 193990 transitions. Word has length 30 [2021-06-05 17:09:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:36,729 INFO L482 AbstractCegarLoop]: Abstraction has 50006 states and 193990 transitions. [2021-06-05 17:09:36,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:09:36,730 INFO L276 IsEmpty]: Start isEmpty. Operand 50006 states and 193990 transitions. [2021-06-05 17:09:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:36,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:36,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:37,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 17:09:37,004 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash -625667857, now seen corresponding path program 169 times [2021-06-05 17:09:37,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:37,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071944874] [2021-06-05 17:09:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:37,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:37,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071944874] [2021-06-05 17:09:37,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071944874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:37,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848554970] [2021-06-05 17:09:37,213 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:09:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:37,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:37,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:37,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:09:37,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:37,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:37,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:37,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:09:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:37,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848554970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:37,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:37,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:09:37,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144850679] [2021-06-05 17:09:37,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:09:37,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:37,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:09:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:09:37,701 INFO L87 Difference]: Start difference. First operand 50006 states and 193990 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:09:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:39,161 INFO L93 Difference]: Finished difference Result 55413 states and 210324 transitions. [2021-06-05 17:09:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:09:39,162 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:09:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:39,303 INFO L225 Difference]: With dead ends: 55413 [2021-06-05 17:09:39,303 INFO L226 Difference]: Without dead ends: 55398 [2021-06-05 17:09:39,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 954.7ms TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:09:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55398 states. [2021-06-05 17:09:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55398 to 50051. [2021-06-05 17:09:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50051 states, 50050 states have (on average 3.878981018981019) internal successors, (194143), 50050 states have internal predecessors, (194143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50051 states to 50051 states and 194143 transitions. [2021-06-05 17:09:40,472 INFO L78 Accepts]: Start accepts. Automaton has 50051 states and 194143 transitions. Word has length 30 [2021-06-05 17:09:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:40,472 INFO L482 AbstractCegarLoop]: Abstraction has 50051 states and 194143 transitions. [2021-06-05 17:09:40,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:09:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 50051 states and 194143 transitions. [2021-06-05 17:09:40,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:40,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:40,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:40,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 17:09:40,745 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:40,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:40,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1938529707, now seen corresponding path program 170 times [2021-06-05 17:09:40,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:40,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543415239] [2021-06-05 17:09:40,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:41,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543415239] [2021-06-05 17:09:41,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543415239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:41,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90101198] [2021-06-05 17:09:41,104 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:41,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:09:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:09:41,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:41,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:41,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 17:09:41,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:09:41,413 INFO L628 ElimStorePlain]: treesize reduction 87, result has 40.0 percent of original size [2021-06-05 17:09:41,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-05 17:09:41,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:84 [2021-06-05 17:09:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:41,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90101198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:41,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:41,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:09:41,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380215625] [2021-06-05 17:09:41,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:09:41,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:09:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:09:41,497 INFO L87 Difference]: Start difference. First operand 50051 states and 194143 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 17:09:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:43,917 INFO L93 Difference]: Finished difference Result 53236 states and 203549 transitions. [2021-06-05 17:09:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:09:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:09:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:44,055 INFO L225 Difference]: With dead ends: 53236 [2021-06-05 17:09:44,055 INFO L226 Difference]: Without dead ends: 53221 [2021-06-05 17:09:44,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1829.0ms TimeCoverageRelationStatistics Valid=347, Invalid=2005, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 17:09:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53221 states. [2021-06-05 17:09:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53221 to 50057. [2021-06-05 17:09:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50057 states, 50056 states have (on average 3.8790155026370465) internal successors, (194168), 50056 states have internal predecessors, (194168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50057 states to 50057 states and 194168 transitions. [2021-06-05 17:09:45,229 INFO L78 Accepts]: Start accepts. Automaton has 50057 states and 194168 transitions. Word has length 30 [2021-06-05 17:09:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:45,230 INFO L482 AbstractCegarLoop]: Abstraction has 50057 states and 194168 transitions. [2021-06-05 17:09:45,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:09:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 50057 states and 194168 transitions. [2021-06-05 17:09:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:45,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:45,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:45,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:45,504 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash -806056025, now seen corresponding path program 171 times [2021-06-05 17:09:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:45,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069695988] [2021-06-05 17:09:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:45,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:45,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069695988] [2021-06-05 17:09:45,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069695988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:45,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279756605] [2021-06-05 17:09:45,699 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:45,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:09:45,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:45,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:09:45,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:46,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:46,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:46,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 27 treesize of output 59 [2021-06-05 17:09:46,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:09:46,182 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-06-05 17:09:46,182 INFO L628 ElimStorePlain]: treesize reduction 169, result has 26.5 percent of original size [2021-06-05 17:09:46,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:46,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:87 [2021-06-05 17:09:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:46,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279756605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:46,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:46,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 25 [2021-06-05 17:09:46,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689766989] [2021-06-05 17:09:46,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:09:46,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:09:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:09:46,291 INFO L87 Difference]: Start difference. First operand 50057 states and 194168 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 17:09:47,397 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2021-06-05 17:09:48,372 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2021-06-05 17:09:49,071 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-06-05 17:09:49,286 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2021-06-05 17:09:49,523 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-06-05 17:09:49,939 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-06-05 17:09:50,434 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-06-05 17:09:51,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:51,460 INFO L93 Difference]: Finished difference Result 71077 states and 266109 transitions. [2021-06-05 17:09:51,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 17:09:51,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 17:09:51,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:51,626 INFO L225 Difference]: With dead ends: 71077 [2021-06-05 17:09:51,627 INFO L226 Difference]: Without dead ends: 71047 [2021-06-05 17:09:51,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 4079.7ms TimeCoverageRelationStatistics Valid=725, Invalid=5281, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 17:09:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71047 states. [2021-06-05 17:09:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71047 to 50086. [2021-06-05 17:09:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50086 states, 50085 states have (on average 3.8791055206149547) internal successors, (194285), 50085 states have internal predecessors, (194285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50086 states to 50086 states and 194285 transitions. [2021-06-05 17:09:52,895 INFO L78 Accepts]: Start accepts. Automaton has 50086 states and 194285 transitions. Word has length 30 [2021-06-05 17:09:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:52,895 INFO L482 AbstractCegarLoop]: Abstraction has 50086 states and 194285 transitions. [2021-06-05 17:09:52,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 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 17:09:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50086 states and 194285 transitions. [2021-06-05 17:09:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:52,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:52,966 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:53,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 17:09:53,166 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1782374869, now seen corresponding path program 172 times [2021-06-05 17:09:53,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:53,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635262252] [2021-06-05 17:09:53,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:53,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:53,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635262252] [2021-06-05 17:09:53,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635262252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:53,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402519697] [2021-06-05 17:09:53,313 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:53,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:09:53,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:09:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:53,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:53,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:53,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:53,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:09:53,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:53,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:53,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:53,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:09:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:53,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402519697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:53,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:53,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:09:53,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462874725] [2021-06-05 17:09:53,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:09:53,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:09:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:53,643 INFO L87 Difference]: Start difference. First operand 50086 states and 194285 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:09:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:09:57,513 INFO L93 Difference]: Finished difference Result 84102 states and 311805 transitions. [2021-06-05 17:09:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 17:09:57,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:09:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:09:57,908 INFO L225 Difference]: With dead ends: 84102 [2021-06-05 17:09:57,909 INFO L226 Difference]: Without dead ends: 84072 [2021-06-05 17:09:57,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 2789.4ms TimeCoverageRelationStatistics Valid=535, Invalid=4435, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 17:09:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84072 states. [2021-06-05 17:09:59,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84072 to 50147. [2021-06-05 17:09:59,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50147 states, 50146 states have (on average 3.8789534559087464) internal successors, (194514), 50146 states have internal predecessors, (194514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:09:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50147 states to 50147 states and 194514 transitions. [2021-06-05 17:09:59,250 INFO L78 Accepts]: Start accepts. Automaton has 50147 states and 194514 transitions. Word has length 30 [2021-06-05 17:09:59,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:09:59,250 INFO L482 AbstractCegarLoop]: Abstraction has 50147 states and 194514 transitions. [2021-06-05 17:09:59,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:09:59,251 INFO L276 IsEmpty]: Start isEmpty. Operand 50147 states and 194514 transitions. [2021-06-05 17:09:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:09:59,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:09:59,323 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:09:59,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:59,524 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:09:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:09:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash -688283281, now seen corresponding path program 173 times [2021-06-05 17:09:59,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:09:59,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831279359] [2021-06-05 17:09:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:09:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:09:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:59,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:09:59,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831279359] [2021-06-05 17:09:59,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831279359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:59,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329744784] [2021-06-05 17:09:59,669 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:09:59,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:09:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:09:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:09:59,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:09:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:59,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:59,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:59,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:59,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:09:59,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:09:59,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:09:59,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:09:59,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:09:59,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:09:59,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:09:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:09:59,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329744784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:09:59,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:09:59,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:09:59,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105761919] [2021-06-05 17:09:59,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:09:59,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:09:59,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:09:59,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:09:59,946 INFO L87 Difference]: Start difference. First operand 50147 states and 194514 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:01,627 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-06-05 17:10:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:02,973 INFO L93 Difference]: Finished difference Result 83268 states and 309473 transitions. [2021-06-05 17:10:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:10:02,973 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:02,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:03,187 INFO L225 Difference]: With dead ends: 83268 [2021-06-05 17:10:03,187 INFO L226 Difference]: Without dead ends: 83253 [2021-06-05 17:10:03,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 2117.0ms TimeCoverageRelationStatistics Valid=413, Invalid=3493, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 17:10:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83253 states. [2021-06-05 17:10:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83253 to 50159. [2021-06-05 17:10:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50159 states, 50158 states have (on average 3.8786634235814823) internal successors, (194546), 50158 states have internal predecessors, (194546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:04,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50159 states to 50159 states and 194546 transitions. [2021-06-05 17:10:04,949 INFO L78 Accepts]: Start accepts. Automaton has 50159 states and 194546 transitions. Word has length 30 [2021-06-05 17:10:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:04,949 INFO L482 AbstractCegarLoop]: Abstraction has 50159 states and 194546 transitions. [2021-06-05 17:10:04,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 50159 states and 194546 transitions. [2021-06-05 17:10:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:05,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:05,027 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:05,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:05,227 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1460513255, now seen corresponding path program 174 times [2021-06-05 17:10:05,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:05,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681510223] [2021-06-05 17:10:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:05,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:05,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681510223] [2021-06-05 17:10:05,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681510223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:05,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542955359] [2021-06-05 17:10:05,377 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:05,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:10:05,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:10:05,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:05,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:05,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:05,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:05,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:10:05,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:05,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:05,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:05,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:10:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:05,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542955359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:05,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:05,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:10:05,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013279788] [2021-06-05 17:10:05,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:10:05,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:10:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:05,660 INFO L87 Difference]: Start difference. First operand 50159 states and 194546 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:07,895 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-06-05 17:10:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:09,313 INFO L93 Difference]: Finished difference Result 94075 states and 345871 transitions. [2021-06-05 17:10:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 17:10:09,314 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:09,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:09,546 INFO L225 Difference]: With dead ends: 94075 [2021-06-05 17:10:09,547 INFO L226 Difference]: Without dead ends: 94045 [2021-06-05 17:10:09,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 2631.4ms TimeCoverageRelationStatistics Valid=621, Invalid=4781, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 17:10:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94045 states. [2021-06-05 17:10:10,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94045 to 50168. [2021-06-05 17:10:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50168 states, 50167 states have (on average 3.8787449917276295) internal successors, (194585), 50167 states have internal predecessors, (194585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50168 states to 50168 states and 194585 transitions. [2021-06-05 17:10:11,324 INFO L78 Accepts]: Start accepts. Automaton has 50168 states and 194585 transitions. Word has length 30 [2021-06-05 17:10:11,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:11,324 INFO L482 AbstractCegarLoop]: Abstraction has 50168 states and 194585 transitions. [2021-06-05 17:10:11,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 50168 states and 194585 transitions. [2021-06-05 17:10:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:11,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:11,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:11,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 17:10:11,598 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:11,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:11,598 INFO L82 PathProgramCache]: Analyzing trace with hash -450848413, now seen corresponding path program 90 times [2021-06-05 17:10:11,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:11,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215502990] [2021-06-05 17:10:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:11,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:11,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215502990] [2021-06-05 17:10:11,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215502990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:11,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764982037] [2021-06-05 17:10:11,927 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:11,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:10:11,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:11,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:10:11,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:12,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:12,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:12,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:12,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:12,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:12,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:10:12,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:12,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:12,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:12,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 17:10:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:12,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764982037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:12,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:12,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:10:12,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229303852] [2021-06-05 17:10:12,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:10:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:12,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:10:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:12,185 INFO L87 Difference]: Start difference. First operand 50168 states and 194585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 17:10:14,160 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-06-05 17:10:14,388 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-06-05 17:10:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:16,400 INFO L93 Difference]: Finished difference Result 63519 states and 239225 transitions. [2021-06-05 17:10:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 17:10:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 17:10:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:16,558 INFO L225 Difference]: With dead ends: 63519 [2021-06-05 17:10:16,558 INFO L226 Difference]: Without dead ends: 63504 [2021-06-05 17:10:16,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3612.7ms TimeCoverageRelationStatistics Valid=569, Invalid=3591, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 17:10:16,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63504 states. [2021-06-05 17:10:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63504 to 50203. [2021-06-05 17:10:17,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50203 states, 50202 states have (on average 3.8777538743476354) internal successors, (194671), 50202 states have internal predecessors, (194671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:17,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50203 states to 50203 states and 194671 transitions. [2021-06-05 17:10:17,961 INFO L78 Accepts]: Start accepts. Automaton has 50203 states and 194671 transitions. Word has length 30 [2021-06-05 17:10:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:17,961 INFO L482 AbstractCegarLoop]: Abstraction has 50203 states and 194671 transitions. [2021-06-05 17:10:17,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 17:10:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 50203 states and 194671 transitions. [2021-06-05 17:10:18,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:18,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:18,042 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:18,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 17:10:18,242 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash 878036001, now seen corresponding path program 175 times [2021-06-05 17:10:18,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:18,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186006855] [2021-06-05 17:10:18,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:18,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:18,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186006855] [2021-06-05 17:10:18,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186006855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927660276] [2021-06-05 17:10:18,394 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:18,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:10:18,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:18,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:18,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:18,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:18,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:10:18,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:18,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:18,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:18,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:10:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:18,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927660276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:18,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:18,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:10:18,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466566758] [2021-06-05 17:10:18,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:10:18,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:18,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:10:18,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:18,778 INFO L87 Difference]: Start difference. First operand 50203 states and 194671 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 17:10:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:22,264 INFO L93 Difference]: Finished difference Result 83399 states and 309818 transitions. [2021-06-05 17:10:22,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:10:22,264 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 17:10:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:22,475 INFO L225 Difference]: With dead ends: 83399 [2021-06-05 17:10:22,475 INFO L226 Difference]: Without dead ends: 83384 [2021-06-05 17:10:22,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2383.6ms TimeCoverageRelationStatistics Valid=468, Invalid=4088, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:10:22,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83384 states. [2021-06-05 17:10:23,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83384 to 50245. [2021-06-05 17:10:23,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-06-05 17:10:23,890 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-06-05 17:10:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-06-05 17:10:23,890 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 17:10:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-06-05 17:10:23,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:23,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:23,961 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:24,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 17:10:24,162 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2084417043, now seen corresponding path program 176 times [2021-06-05 17:10:24,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:24,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053980873] [2021-06-05 17:10:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:24,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053980873] [2021-06-05 17:10:24,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053980873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13157430] [2021-06-05 17:10:24,342 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:24,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:10:24,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:24,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:10:24,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:24,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:24,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:24,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:24,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:24,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:10:24,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:24,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:24,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:24,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:10:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:24,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13157430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:24,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:24,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 17:10:24,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825921225] [2021-06-05 17:10:24,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:10:24,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:10:24,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:10:24,755 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) 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 17:10:26,271 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-06-05 17:10:27,719 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-06-05 17:10:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:28,045 INFO L93 Difference]: Finished difference Result 71516 states and 267553 transitions. [2021-06-05 17:10:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 17:10:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) 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 17:10:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:28,221 INFO L225 Difference]: With dead ends: 71516 [2021-06-05 17:10:28,221 INFO L226 Difference]: Without dead ends: 71501 [2021-06-05 17:10:28,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 2704.2ms TimeCoverageRelationStatistics Valid=535, Invalid=3497, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:10:28,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71501 states. [2021-06-05 17:10:29,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71501 to 50245. [2021-06-05 17:10:29,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50245 states, 50244 states have (on average 3.877517713557838) internal successors, (194822), 50244 states have internal predecessors, (194822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50245 states to 50245 states and 194822 transitions. [2021-06-05 17:10:29,450 INFO L78 Accepts]: Start accepts. Automaton has 50245 states and 194822 transitions. Word has length 30 [2021-06-05 17:10:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:29,450 INFO L482 AbstractCegarLoop]: Abstraction has 50245 states and 194822 transitions. [2021-06-05 17:10:29,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5238095238095237) 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 17:10:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 50245 states and 194822 transitions. [2021-06-05 17:10:29,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:29,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:29,521 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:29,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 17:10:29,722 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:29,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1108098199, now seen corresponding path program 177 times [2021-06-05 17:10:29,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:29,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814713039] [2021-06-05 17:10:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:29,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:29,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814713039] [2021-06-05 17:10:29,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814713039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:29,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231437238] [2021-06-05 17:10:29,865 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:29,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:10:29,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:10:29,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:30,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:30,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 [2021-06-05 17:10:30,624 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 145 [2021-06-05 17:10:30,645 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 17:10:30,808 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2021-06-05 17:10:30,808 INFO L628 ElimStorePlain]: treesize reduction 62, result has 77.0 percent of original size [2021-06-05 17:10:31,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 17:10:31,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:2120 [2021-06-05 17:10:31,598 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 54 [2021-06-05 17:10:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:31,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231437238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:31,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:31,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-06-05 17:10:31,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134791477] [2021-06-05 17:10:31,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 17:10:31,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:31,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 17:10:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:10:31,750 INFO L87 Difference]: Start difference. First operand 50245 states and 194822 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) 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 17:10:32,129 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-06-05 17:10:33,108 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2021-06-05 17:10:37,124 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 17:10:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:37,473 INFO L93 Difference]: Finished difference Result 84175 states and 312104 transitions. [2021-06-05 17:10:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 17:10:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) 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 17:10:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:37,691 INFO L225 Difference]: With dead ends: 84175 [2021-06-05 17:10:37,692 INFO L226 Difference]: Without dead ends: 84145 [2021-06-05 17:10:37,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 4329.2ms TimeCoverageRelationStatistics Valid=599, Invalid=6043, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 17:10:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84145 states. [2021-06-05 17:10:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84145 to 50231. [2021-06-05 17:10:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50231 states, 50230 states have (on average 3.8775233923949832) internal successors, (194768), 50230 states have internal predecessors, (194768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50231 states to 50231 states and 194768 transitions. [2021-06-05 17:10:39,050 INFO L78 Accepts]: Start accepts. Automaton has 50231 states and 194768 transitions. Word has length 30 [2021-06-05 17:10:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:39,050 INFO L482 AbstractCegarLoop]: Abstraction has 50231 states and 194768 transitions. [2021-06-05 17:10:39,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) 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 17:10:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 50231 states and 194768 transitions. [2021-06-05 17:10:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:39,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:39,294 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:39,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 17:10:39,494 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:39,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1339274201, now seen corresponding path program 178 times [2021-06-05 17:10:39,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:39,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743972162] [2021-06-05 17:10:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:39,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:39,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743972162] [2021-06-05 17:10:39,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743972162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:39,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989720457] [2021-06-05 17:10:39,717 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:39,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:10:39,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:10:39,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:39,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:39,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:39,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:10:39,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:39,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:39,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:39,966 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:10:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:39,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989720457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:39,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:39,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:10:39,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116075980] [2021-06-05 17:10:39,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:10:39,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:10:39,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:10:39,978 INFO L87 Difference]: Start difference. First operand 50231 states and 194768 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:10:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:41,321 INFO L93 Difference]: Finished difference Result 73610 states and 278935 transitions. [2021-06-05 17:10:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:10:41,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:10:41,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:41,500 INFO L225 Difference]: With dead ends: 73610 [2021-06-05 17:10:41,500 INFO L226 Difference]: Without dead ends: 73580 [2021-06-05 17:10:41,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 912.1ms TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:10:41,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73580 states. [2021-06-05 17:10:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73580 to 50288. [2021-06-05 17:10:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50288 states, 50287 states have (on average 3.876946328076839) internal successors, (194960), 50287 states have internal predecessors, (194960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50288 states to 50288 states and 194960 transitions. [2021-06-05 17:10:42,901 INFO L78 Accepts]: Start accepts. Automaton has 50288 states and 194960 transitions. Word has length 30 [2021-06-05 17:10:42,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:42,901 INFO L482 AbstractCegarLoop]: Abstraction has 50288 states and 194960 transitions. [2021-06-05 17:10:42,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:10:42,901 INFO L276 IsEmpty]: Start isEmpty. Operand 50288 states and 194960 transitions. [2021-06-05 17:10:42,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:42,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:42,971 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:43,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-05 17:10:43,171 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:43,172 INFO L82 PathProgramCache]: Analyzing trace with hash 927295079, now seen corresponding path program 179 times [2021-06-05 17:10:43,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:43,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132342833] [2021-06-05 17:10:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:43,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:43,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132342833] [2021-06-05 17:10:43,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132342833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:43,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975291228] [2021-06-05 17:10:43,397 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:43,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:10:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:10:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:43,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:43,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:43,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:43,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:10:43,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:43,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:43,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:43,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:3 [2021-06-05 17:10:43,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:43,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975291228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:43,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:43,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:10:43,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906913991] [2021-06-05 17:10:43,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:10:43,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:43,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:10:43,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:43,717 INFO L87 Difference]: Start difference. First operand 50288 states and 194960 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 17:10:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:46,105 INFO L93 Difference]: Finished difference Result 73555 states and 278809 transitions. [2021-06-05 17:10:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:10:46,105 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 17:10:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:46,291 INFO L225 Difference]: With dead ends: 73555 [2021-06-05 17:10:46,292 INFO L226 Difference]: Without dead ends: 73540 [2021-06-05 17:10:46,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1435.0ms TimeCoverageRelationStatistics Valid=440, Invalid=2640, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:10:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73540 states. [2021-06-05 17:10:47,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73540 to 50280. [2021-06-05 17:10:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50280 states, 50279 states have (on average 3.8771455279540166) internal successors, (194939), 50279 states have internal predecessors, (194939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50280 states to 50280 states and 194939 transitions. [2021-06-05 17:10:47,641 INFO L78 Accepts]: Start accepts. Automaton has 50280 states and 194939 transitions. Word has length 30 [2021-06-05 17:10:47,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:47,641 INFO L482 AbstractCegarLoop]: Abstraction has 50280 states and 194939 transitions. [2021-06-05 17:10:47,641 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 17:10:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 50280 states and 194939 transitions. [2021-06-05 17:10:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:47,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:47,714 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:47,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable662,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:47,915 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:47,915 INFO L82 PathProgramCache]: Analyzing trace with hash -971195733, now seen corresponding path program 180 times [2021-06-05 17:10:47,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:47,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693931196] [2021-06-05 17:10:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:48,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:48,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693931196] [2021-06-05 17:10:48,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693931196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:48,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956362656] [2021-06-05 17:10:48,144 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:48,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:10:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:10:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:10:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:48,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:48,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:48,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:10:48,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:48,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:48,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:48,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:10:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:48,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956362656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:48,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:48,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:10:48,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226646192] [2021-06-05 17:10:48,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:10:48,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:10:48,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:10:48,646 INFO L87 Difference]: Start difference. First operand 50280 states and 194939 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:10:50,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:50,296 INFO L93 Difference]: Finished difference Result 76864 states and 288901 transitions. [2021-06-05 17:10:50,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:10:50,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:10:50,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:50,489 INFO L225 Difference]: With dead ends: 76864 [2021-06-05 17:10:50,489 INFO L226 Difference]: Without dead ends: 76849 [2021-06-05 17:10:50,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1166.1ms TimeCoverageRelationStatistics Valid=517, Invalid=2345, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:10:50,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76849 states. [2021-06-05 17:10:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76849 to 50282. [2021-06-05 17:10:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50282 states, 50281 states have (on average 3.8772498558103456) internal successors, (194952), 50281 states have internal predecessors, (194952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50282 states to 50282 states and 194952 transitions. [2021-06-05 17:10:52,036 INFO L78 Accepts]: Start accepts. Automaton has 50282 states and 194952 transitions. Word has length 30 [2021-06-05 17:10:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:52,036 INFO L482 AbstractCegarLoop]: Abstraction has 50282 states and 194952 transitions. [2021-06-05 17:10:52,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:10:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 50282 states and 194952 transitions. [2021-06-05 17:10:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:52,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:52,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:52,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 17:10:52,309 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash -397133013, now seen corresponding path program 181 times [2021-06-05 17:10:52,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:52,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677988945] [2021-06-05 17:10:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:52,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:10:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677988945] [2021-06-05 17:10:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677988945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438636629] [2021-06-05 17:10:52,461 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:10:52,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:10:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:10:52,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:10:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:52,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:10:52,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:10:52,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:10:52,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:10:52,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:10:52,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:10:52,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:10:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:10:52,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438636629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:10:52,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:10:52,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:10:52,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799494747] [2021-06-05 17:10:52,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:10:52,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:10:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:10:52,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:10:52,795 INFO L87 Difference]: Start difference. First operand 50282 states and 194952 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:10:57,820 INFO L93 Difference]: Finished difference Result 91774 states and 339295 transitions. [2021-06-05 17:10:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 17:10:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:57,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:10:58,228 INFO L225 Difference]: With dead ends: 91774 [2021-06-05 17:10:58,228 INFO L226 Difference]: Without dead ends: 91744 [2021-06-05 17:10:58,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 3108.7ms TimeCoverageRelationStatistics Valid=655, Invalid=5665, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 17:10:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91744 states. [2021-06-05 17:10:59,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91744 to 50413. [2021-06-05 17:10:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:10:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-06-05 17:10:59,644 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-06-05 17:10:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:10:59,644 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-06-05 17:10:59,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:10:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-06-05 17:10:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:10:59,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:10:59,716 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:10:59,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 17:10:59,917 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:10:59,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:10:59,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1812767055, now seen corresponding path program 182 times [2021-06-05 17:10:59,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:10:59,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835824050] [2021-06-05 17:10:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:10:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:00,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:00,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835824050] [2021-06-05 17:11:00,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835824050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:00,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556704006] [2021-06-05 17:11:00,138 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:00,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:11:00,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:00,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:11:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:00,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:00,394 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 17:11:00,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:11:00,487 INFO L628 ElimStorePlain]: treesize reduction 150, result has 31.5 percent of original size [2021-06-05 17:11:00,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:11:00,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:88 [2021-06-05 17:11:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556704006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:00,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:00,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:11:00,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074531537] [2021-06-05 17:11:00,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:11:00,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:11:00,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:11:00,572 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:01,687 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-06-05 17:11:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:03,150 INFO L93 Difference]: Finished difference Result 72565 states and 275989 transitions. [2021-06-05 17:11:03,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 17:11:03,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:03,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:03,332 INFO L225 Difference]: With dead ends: 72565 [2021-06-05 17:11:03,332 INFO L226 Difference]: Without dead ends: 72535 [2021-06-05 17:11:03,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1847.7ms TimeCoverageRelationStatistics Valid=404, Invalid=2352, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 17:11:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72535 states. [2021-06-05 17:11:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72535 to 50413. [2021-06-05 17:11:04,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50413 states, 50412 states have (on average 3.876001745616123) internal successors, (195397), 50412 states have internal predecessors, (195397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50413 states to 50413 states and 195397 transitions. [2021-06-05 17:11:04,710 INFO L78 Accepts]: Start accepts. Automaton has 50413 states and 195397 transitions. Word has length 30 [2021-06-05 17:11:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:04,710 INFO L482 AbstractCegarLoop]: Abstraction has 50413 states and 195397 transitions. [2021-06-05 17:11:04,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 50413 states and 195397 transitions. [2021-06-05 17:11:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:05,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:05,007 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:05,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable665 [2021-06-05 17:11:05,213 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash -215630961, now seen corresponding path program 183 times [2021-06-05 17:11:05,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:05,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29416617] [2021-06-05 17:11:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:05,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:05,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29416617] [2021-06-05 17:11:05,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29416617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:05,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396545852] [2021-06-05 17:11:05,434 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:05,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:11:05,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:05,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:11:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:05,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:05,692 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 17:11:05,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:11:05,799 INFO L628 ElimStorePlain]: treesize reduction 131, result has 36.7 percent of original size [2021-06-05 17:11:05,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:11:05,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:69 [2021-06-05 17:11:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:05,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396545852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:05,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:05,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:11:05,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938189142] [2021-06-05 17:11:05,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:11:05,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:11:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:11:05,879 INFO L87 Difference]: Start difference. First operand 50413 states and 195397 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:08,511 INFO L93 Difference]: Finished difference Result 72583 states and 276055 transitions. [2021-06-05 17:11:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:11:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:08,692 INFO L225 Difference]: With dead ends: 72583 [2021-06-05 17:11:08,692 INFO L226 Difference]: Without dead ends: 72568 [2021-06-05 17:11:08,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 1898.2ms TimeCoverageRelationStatistics Valid=486, Invalid=2936, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 17:11:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72568 states. [2021-06-05 17:11:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72568 to 50379. [2021-06-05 17:11:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50379 states, 50378 states have (on average 3.8765334074397555) internal successors, (195292), 50378 states have internal predecessors, (195292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:09,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50379 states to 50379 states and 195292 transitions. [2021-06-05 17:11:09,981 INFO L78 Accepts]: Start accepts. Automaton has 50379 states and 195292 transitions. Word has length 30 [2021-06-05 17:11:09,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:09,981 INFO L482 AbstractCegarLoop]: Abstraction has 50379 states and 195292 transitions. [2021-06-05 17:11:09,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:09,982 INFO L276 IsEmpty]: Start isEmpty. Operand 50379 states and 195292 transitions. [2021-06-05 17:11:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:10,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:10,055 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:10,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:10,255 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:10,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:10,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2141926627, now seen corresponding path program 184 times [2021-06-05 17:11:10,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:10,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351282808] [2021-06-05 17:11:10,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:10,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351282808] [2021-06-05 17:11:10,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351282808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:10,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281487068] [2021-06-05 17:11:10,406 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:10,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:11:10,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:10,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:11:10,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:10,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:10,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:10,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:11:10,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:10,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:10,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:10,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:11:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:10,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281487068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:10,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:10,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:11:10,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036078178] [2021-06-05 17:11:10,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:11:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:11:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:11:10,673 INFO L87 Difference]: Start difference. First operand 50379 states and 195292 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:11:11,515 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 17:11:12,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:12,616 INFO L93 Difference]: Finished difference Result 74068 states and 280349 transitions. [2021-06-05 17:11:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:11:12,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:11:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:12,797 INFO L225 Difference]: With dead ends: 74068 [2021-06-05 17:11:12,798 INFO L226 Difference]: Without dead ends: 74038 [2021-06-05 17:11:12,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1282.6ms TimeCoverageRelationStatistics Valid=496, Invalid=2366, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 17:11:12,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74038 states. [2021-06-05 17:11:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74038 to 50389. [2021-06-05 17:11:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50389 states, 50388 states have (on average 3.8765579106136383) internal successors, (195332), 50388 states have internal predecessors, (195332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50389 states to 50389 states and 195332 transitions. [2021-06-05 17:11:14,148 INFO L78 Accepts]: Start accepts. Automaton has 50389 states and 195332 transitions. Word has length 30 [2021-06-05 17:11:14,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:14,148 INFO L482 AbstractCegarLoop]: Abstraction has 50389 states and 195332 transitions. [2021-06-05 17:11:14,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 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 17:11:14,148 INFO L276 IsEmpty]: Start isEmpty. Operand 50389 states and 195332 transitions. [2021-06-05 17:11:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:14,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:14,224 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:14,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable687,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:14,425 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1974117535, now seen corresponding path program 185 times [2021-06-05 17:11:14,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:14,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922332013] [2021-06-05 17:11:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:14,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:14,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922332013] [2021-06-05 17:11:14,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922332013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:14,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470012920] [2021-06-05 17:11:14,797 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:14,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:11:14,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:14,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:11:14,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:15,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:15,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:15,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:15,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-06-05 17:11:15,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:15,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:15,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:15,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:7 [2021-06-05 17:11:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:15,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470012920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:15,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:15,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 17:11:15,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064443119] [2021-06-05 17:11:15,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:11:15,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:11:15,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:11:15,059 INFO L87 Difference]: Start difference. First operand 50389 states and 195332 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:11:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:16,149 INFO L93 Difference]: Finished difference Result 60193 states and 228714 transitions. [2021-06-05 17:11:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:11:16,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 30 [2021-06-05 17:11:16,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:16,297 INFO L225 Difference]: With dead ends: 60193 [2021-06-05 17:11:16,297 INFO L226 Difference]: Without dead ends: 60178 [2021-06-05 17:11:16,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 838.9ms TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:11:16,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60178 states. [2021-06-05 17:11:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60178 to 50385. [2021-06-05 17:11:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50385 states, 50384 states have (on average 3.876587805652588) internal successors, (195318), 50384 states have internal predecessors, (195318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50385 states to 50385 states and 195318 transitions. [2021-06-05 17:11:17,516 INFO L78 Accepts]: Start accepts. Automaton has 50385 states and 195318 transitions. Word has length 30 [2021-06-05 17:11:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:17,516 INFO L482 AbstractCegarLoop]: Abstraction has 50385 states and 195318 transitions. [2021-06-05 17:11:17,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 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 17:11:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 50385 states and 195318 transitions. [2021-06-05 17:11:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:17,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:17,588 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:17,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-05 17:11:17,788 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:17,789 INFO L82 PathProgramCache]: Analyzing trace with hash -93398493, now seen corresponding path program 186 times [2021-06-05 17:11:17,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:17,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409983400] [2021-06-05 17:11:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:17,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:17,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409983400] [2021-06-05 17:11:17,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409983400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:17,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183399088] [2021-06-05 17:11:17,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:17,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:11:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 17:11:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:18,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:18,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 61 [2021-06-05 17:11:18,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 17:11:18,431 INFO L628 ElimStorePlain]: treesize reduction 242, result has 13.3 percent of original size [2021-06-05 17:11:18,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:18,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:55 [2021-06-05 17:11:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:18,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183399088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:18,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:18,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-06-05 17:11:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160854770] [2021-06-05 17:11:18,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:11:18,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:18,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:11:18,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:11:18,585 INFO L87 Difference]: Start difference. First operand 50385 states and 195318 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 17:11:21,018 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-06-05 17:11:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:22,923 INFO L93 Difference]: Finished difference Result 78681 states and 297156 transitions. [2021-06-05 17:11:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 17:11:22,923 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 17:11:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:23,114 INFO L225 Difference]: With dead ends: 78681 [2021-06-05 17:11:23,114 INFO L226 Difference]: Without dead ends: 78666 [2021-06-05 17:11:23,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2942.8ms TimeCoverageRelationStatistics Valid=1045, Invalid=6611, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 17:11:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78666 states. [2021-06-05 17:11:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78666 to 50388. [2021-06-05 17:11:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50388 states, 50387 states have (on average 3.876654692678667) internal successors, (195333), 50387 states have internal predecessors, (195333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50388 states to 50388 states and 195333 transitions. [2021-06-05 17:11:24,603 INFO L78 Accepts]: Start accepts. Automaton has 50388 states and 195333 transitions. Word has length 30 [2021-06-05 17:11:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:24,603 INFO L482 AbstractCegarLoop]: Abstraction has 50388 states and 195333 transitions. [2021-06-05 17:11:24,603 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 17:11:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 50388 states and 195333 transitions. [2021-06-05 17:11:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:24,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:24,674 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:24,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 17:11:24,874 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash -590119853, now seen corresponding path program 187 times [2021-06-05 17:11:24,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:24,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664040464] [2021-06-05 17:11:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:25,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:25,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664040464] [2021-06-05 17:11:25,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664040464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:25,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554199054] [2021-06-05 17:11:25,111 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:25,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:11:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:25,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:25,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:25,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:11:25,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:25,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:25,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:25,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:11:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:25,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554199054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:25,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:25,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:11:25,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92428594] [2021-06-05 17:11:25,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:11:25,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:25,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:11:25,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:11:25,381 INFO L87 Difference]: Start difference. First operand 50388 states and 195333 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:11:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:27,221 INFO L93 Difference]: Finished difference Result 77532 states and 294234 transitions. [2021-06-05 17:11:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:11:27,221 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:11:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:27,407 INFO L225 Difference]: With dead ends: 77532 [2021-06-05 17:11:27,408 INFO L226 Difference]: Without dead ends: 77517 [2021-06-05 17:11:27,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1099.6ms TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 17:11:27,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77517 states. [2021-06-05 17:11:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77517 to 50404. [2021-06-05 17:11:28,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50404 states, 50403 states have (on average 3.8768724083883894) internal successors, (195406), 50403 states have internal predecessors, (195406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50404 states to 50404 states and 195406 transitions. [2021-06-05 17:11:28,735 INFO L78 Accepts]: Start accepts. Automaton has 50404 states and 195406 transitions. Word has length 30 [2021-06-05 17:11:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:28,736 INFO L482 AbstractCegarLoop]: Abstraction has 50404 states and 195406 transitions. [2021-06-05 17:11:28,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:11:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 50404 states and 195406 transitions. [2021-06-05 17:11:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:28,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:28,807 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:29,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable710 [2021-06-05 17:11:29,007 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash 2087314663, now seen corresponding path program 188 times [2021-06-05 17:11:29,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:29,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330987934] [2021-06-05 17:11:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:29,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330987934] [2021-06-05 17:11:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330987934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612412400] [2021-06-05 17:11:29,158 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:29,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:11:29,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:29,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:11:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:29,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:29,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:29,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:29,365 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 25 treesize of output 37 [2021-06-05 17:11:29,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:11:29,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:29,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:11:29,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 17:11:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:29,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612412400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:29,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:29,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:11:29,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632702825] [2021-06-05 17:11:29,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:11:29,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:29,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:11:29,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:11:29,421 INFO L87 Difference]: Start difference. First operand 50404 states and 195406 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 17:11:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:31,841 INFO L93 Difference]: Finished difference Result 79064 states and 298479 transitions. [2021-06-05 17:11:31,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 17:11:31,841 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 17:11:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:32,037 INFO L225 Difference]: With dead ends: 79064 [2021-06-05 17:11:32,037 INFO L226 Difference]: Without dead ends: 79034 [2021-06-05 17:11:32,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1574 ImplicationChecksByTransitivity, 1545.0ms TimeCoverageRelationStatistics Valid=813, Invalid=3743, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:11:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79034 states. [2021-06-05 17:11:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79034 to 50410. [2021-06-05 17:11:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50410 states, 50409 states have (on average 3.876986252454919) internal successors, (195435), 50409 states have internal predecessors, (195435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50410 states to 50410 states and 195435 transitions. [2021-06-05 17:11:33,623 INFO L78 Accepts]: Start accepts. Automaton has 50410 states and 195435 transitions. Word has length 30 [2021-06-05 17:11:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:33,623 INFO L482 AbstractCegarLoop]: Abstraction has 50410 states and 195435 transitions. [2021-06-05 17:11:33,623 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 17:11:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 50410 states and 195435 transitions. [2021-06-05 17:11:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:33,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:33,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:33,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:33,895 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:33,896 INFO L82 PathProgramCache]: Analyzing trace with hash 304550503, now seen corresponding path program 189 times [2021-06-05 17:11:33,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:33,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903654624] [2021-06-05 17:11:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:34,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:34,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903654624] [2021-06-05 17:11:34,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903654624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:34,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066537512] [2021-06-05 17:11:34,120 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:34,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:11:34,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:11:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:34,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:34,362 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 17:11:34,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:11:34,471 INFO L628 ElimStorePlain]: treesize reduction 150, result has 35.9 percent of original size [2021-06-05 17:11:34,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:11:34,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:94 [2021-06-05 17:11:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:34,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066537512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:34,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:34,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:11:34,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265897338] [2021-06-05 17:11:34,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:11:34,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:34,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:11:34,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:11:34,550 INFO L87 Difference]: Start difference. First operand 50410 states and 195435 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:37,946 INFO L93 Difference]: Finished difference Result 78571 states and 297050 transitions. [2021-06-05 17:11:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 17:11:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:38,140 INFO L225 Difference]: With dead ends: 78571 [2021-06-05 17:11:38,140 INFO L226 Difference]: Without dead ends: 78556 [2021-06-05 17:11:38,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2444.8ms TimeCoverageRelationStatistics Valid=709, Invalid=3847, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 17:11:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78556 states. [2021-06-05 17:11:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78556 to 50420. [2021-06-05 17:11:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50420 states, 50419 states have (on average 3.8771296535036397) internal successors, (195481), 50419 states have internal predecessors, (195481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:39,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50420 states to 50420 states and 195481 transitions. [2021-06-05 17:11:39,719 INFO L78 Accepts]: Start accepts. Automaton has 50420 states and 195481 transitions. Word has length 30 [2021-06-05 17:11:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:39,719 INFO L482 AbstractCegarLoop]: Abstraction has 50420 states and 195481 transitions. [2021-06-05 17:11:39,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:11:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 50420 states and 195481 transitions. [2021-06-05 17:11:39,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:39,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:39,798 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:39,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable716,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:39,998 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:39,999 INFO L82 PathProgramCache]: Analyzing trace with hash 878613223, now seen corresponding path program 190 times [2021-06-05 17:11:39,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:39,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532319017] [2021-06-05 17:11:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:40,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:40,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532319017] [2021-06-05 17:11:40,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532319017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:40,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263596047] [2021-06-05 17:11:40,151 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:40,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:11:40,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:40,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:11:40,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:40,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:40,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:40,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:40,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:40,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:11:40,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:40,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:40,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:40,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:11:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:40,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263596047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:40,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:40,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:11:40,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319428746] [2021-06-05 17:11:40,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:11:40,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:40,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:11:40,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:11:40,473 INFO L87 Difference]: Start difference. First operand 50420 states and 195481 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:11:42,777 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 17:11:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:46,679 INFO L93 Difference]: Finished difference Result 96588 states and 356674 transitions. [2021-06-05 17:11:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 17:11:46,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:11:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:46,912 INFO L225 Difference]: With dead ends: 96588 [2021-06-05 17:11:46,912 INFO L226 Difference]: Without dead ends: 96543 [2021-06-05 17:11:46,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 4113.4ms TimeCoverageRelationStatistics Valid=1133, Invalid=8373, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 17:11:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96543 states. [2021-06-05 17:11:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96543 to 50456. [2021-06-05 17:11:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50456 states, 50455 states have (on average 3.877653354474284) internal successors, (195647), 50455 states have internal predecessors, (195647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50456 states to 50456 states and 195647 transitions. [2021-06-05 17:11:48,452 INFO L78 Accepts]: Start accepts. Automaton has 50456 states and 195647 transitions. Word has length 30 [2021-06-05 17:11:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:48,452 INFO L482 AbstractCegarLoop]: Abstraction has 50456 states and 195647 transitions. [2021-06-05 17:11:48,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:11:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 50456 states and 195647 transitions. [2021-06-05 17:11:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:48,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:48,524 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:48,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:48,724 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:48,724 INFO L82 PathProgramCache]: Analyzing trace with hash 276888099, now seen corresponding path program 191 times [2021-06-05 17:11:48,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:48,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945416877] [2021-06-05 17:11:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:48,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:48,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945416877] [2021-06-05 17:11:48,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945416877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:48,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747467520] [2021-06-05 17:11:48,895 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:48,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:11:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:11:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:49,324 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 17:11:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:49,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:49,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:49,343 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 25 treesize of output 37 [2021-06-05 17:11:49,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:11:49,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:49,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:11:49,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 17:11:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:49,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747467520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:49,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:49,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:11:49,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470429703] [2021-06-05 17:11:49,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:11:49,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:49,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:11:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:11:49,398 INFO L87 Difference]: Start difference. First operand 50456 states and 195647 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 17:11:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:51,944 INFO L93 Difference]: Finished difference Result 81340 states and 306603 transitions. [2021-06-05 17:11:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 17:11:51,944 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 17:11:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:52,132 INFO L225 Difference]: With dead ends: 81340 [2021-06-05 17:11:52,132 INFO L226 Difference]: Without dead ends: 81310 [2021-06-05 17:11:52,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1408.4ms TimeCoverageRelationStatistics Valid=729, Invalid=2931, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:11:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81310 states. [2021-06-05 17:11:53,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81310 to 50462. [2021-06-05 17:11:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50462 states, 50461 states have (on average 3.877945343928975) internal successors, (195685), 50461 states have internal predecessors, (195685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50462 states to 50462 states and 195685 transitions. [2021-06-05 17:11:53,419 INFO L78 Accepts]: Start accepts. Automaton has 50462 states and 195685 transitions. Word has length 30 [2021-06-05 17:11:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:53,419 INFO L482 AbstractCegarLoop]: Abstraction has 50462 states and 195685 transitions. [2021-06-05 17:11:53,419 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 17:11:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 50462 states and 195685 transitions. [2021-06-05 17:11:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:53,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:53,489 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:53,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:53,690 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 297624627, now seen corresponding path program 192 times [2021-06-05 17:11:53,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:53,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488865922] [2021-06-05 17:11:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:53,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:53,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488865922] [2021-06-05 17:11:53,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488865922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:53,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942418063] [2021-06-05 17:11:53,913 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:53,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:11:53,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:11:53,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 17:11:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:54,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:54,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:54,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:54,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:54,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:54,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-06-05 17:11:54,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:11:54,219 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.7 percent of original size [2021-06-05 17:11:54,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:54,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:35 [2021-06-05 17:11:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:54,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942418063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:54,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:54,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 24 [2021-06-05 17:11:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890928713] [2021-06-05 17:11:54,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:11:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:11:54,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:11:54,265 INFO L87 Difference]: Start difference. First operand 50462 states and 195685 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 17:11:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:11:57,432 INFO L93 Difference]: Finished difference Result 79161 states and 299995 transitions. [2021-06-05 17:11:57,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 17:11:57,433 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 17:11:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:11:57,630 INFO L225 Difference]: With dead ends: 79161 [2021-06-05 17:11:57,630 INFO L226 Difference]: Without dead ends: 79131 [2021-06-05 17:11:57,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2053.4ms TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 17:11:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79131 states. [2021-06-05 17:11:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79131 to 50460. [2021-06-05 17:11:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50460 states, 50459 states have (on average 3.877960324223627) internal successors, (195678), 50459 states have internal predecessors, (195678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:11:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50460 states to 50460 states and 195678 transitions. [2021-06-05 17:11:59,204 INFO L78 Accepts]: Start accepts. Automaton has 50460 states and 195678 transitions. Word has length 30 [2021-06-05 17:11:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:11:59,204 INFO L482 AbstractCegarLoop]: Abstraction has 50460 states and 195678 transitions. [2021-06-05 17:11:59,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 17:11:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 50460 states and 195678 transitions. [2021-06-05 17:11:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:11:59,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:11:59,278 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:11:59,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 17:11:59,478 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:11:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:11:59,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2080925591, now seen corresponding path program 193 times [2021-06-05 17:11:59,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:11:59,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73266262] [2021-06-05 17:11:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:11:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:59,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:11:59,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73266262] [2021-06-05 17:11:59,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73266262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:59,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859344304] [2021-06-05 17:11:59,626 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:11:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:11:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:11:59,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:11:59,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:59,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:11:59,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:11:59,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:11:59,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:11:59,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:11:59,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:11:59,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:11:59,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:11:59,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859344304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:11:59,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:11:59,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:11:59,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463159201] [2021-06-05 17:11:59,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:11:59,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:11:59,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:11:59,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:11:59,938 INFO L87 Difference]: Start difference. First operand 50460 states and 195678 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:01,815 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 17:12:05,109 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 17:12:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:05,398 INFO L93 Difference]: Finished difference Result 95802 states and 354482 transitions. [2021-06-05 17:12:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 17:12:05,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:05,638 INFO L225 Difference]: With dead ends: 95802 [2021-06-05 17:12:05,638 INFO L226 Difference]: Without dead ends: 95757 [2021-06-05 17:12:05,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 3910.3ms TimeCoverageRelationStatistics Valid=1115, Invalid=7441, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 17:12:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95757 states. [2021-06-05 17:12:06,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95757 to 50464. [2021-06-05 17:12:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50464 states, 50463 states have (on average 3.8779898143194025) internal successors, (195695), 50463 states have internal predecessors, (195695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:07,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50464 states to 50464 states and 195695 transitions. [2021-06-05 17:12:07,146 INFO L78 Accepts]: Start accepts. Automaton has 50464 states and 195695 transitions. Word has length 30 [2021-06-05 17:12:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:07,146 INFO L482 AbstractCegarLoop]: Abstraction has 50464 states and 195695 transitions. [2021-06-05 17:12:07,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:07,146 INFO L276 IsEmpty]: Start isEmpty. Operand 50464 states and 195695 transitions. [2021-06-05 17:12:07,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:07,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:07,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:07,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:07,418 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:07,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:07,419 INFO L82 PathProgramCache]: Analyzing trace with hash -380393053, now seen corresponding path program 194 times [2021-06-05 17:12:07,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:07,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598175132] [2021-06-05 17:12:07,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:07,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:07,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598175132] [2021-06-05 17:12:07,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598175132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:07,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246445278] [2021-06-05 17:12:07,591 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:12:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:12:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:07,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:07,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:07,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 17:12:07,779 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:12:07,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:07,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:07,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 17:12:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:07,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246445278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:07,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:07,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:12:07,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560140482] [2021-06-05 17:12:07,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:07,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:07,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:07,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:07,824 INFO L87 Difference]: Start difference. First operand 50464 states and 195695 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 17:12:08,155 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-05 17:12:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:13,532 INFO L93 Difference]: Finished difference Result 97872 states and 363697 transitions. [2021-06-05 17:12:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 17:12:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 17:12:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:13,777 INFO L225 Difference]: With dead ends: 97872 [2021-06-05 17:12:13,777 INFO L226 Difference]: Without dead ends: 97842 [2021-06-05 17:12:13,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 4073.0ms TimeCoverageRelationStatistics Valid=1175, Invalid=8725, Unknown=0, NotChecked=0, Total=9900 [2021-06-05 17:12:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97842 states. [2021-06-05 17:12:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97842 to 50467. [2021-06-05 17:12:15,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 50466 states have (on average 3.8780565132960807) internal successors, (195710), 50466 states have internal predecessors, (195710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 195710 transitions. [2021-06-05 17:12:15,282 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 195710 transitions. Word has length 30 [2021-06-05 17:12:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:15,282 INFO L482 AbstractCegarLoop]: Abstraction has 50467 states and 195710 transitions. [2021-06-05 17:12:15,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 17:12:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 195710 transitions. [2021-06-05 17:12:15,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:15,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:15,352 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:15,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:15,553 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash -303306601, now seen corresponding path program 195 times [2021-06-05 17:12:15,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:15,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534063094] [2021-06-05 17:12:15,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:15,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534063094] [2021-06-05 17:12:15,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534063094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:15,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240461938] [2021-06-05 17:12:15,777 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:15,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:12:15,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:12:15,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:16,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:16,028 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 17:12:16,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:12:16,142 INFO L628 ElimStorePlain]: treesize reduction 131, result has 37.9 percent of original size [2021-06-05 17:12:16,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 17:12:16,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:90 [2021-06-05 17:12:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:16,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240461938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:16,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:16,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 17:12:16,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206260896] [2021-06-05 17:12:16,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:16,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:16,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:16,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:16,236 INFO L87 Difference]: Start difference. First operand 50467 states and 195710 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) 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 17:12:17,228 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2021-06-05 17:12:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:19,323 INFO L93 Difference]: Finished difference Result 73646 states and 278776 transitions. [2021-06-05 17:12:19,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 17:12:19,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:12:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:19,503 INFO L225 Difference]: With dead ends: 73646 [2021-06-05 17:12:19,503 INFO L226 Difference]: Without dead ends: 73631 [2021-06-05 17:12:19,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2383.0ms TimeCoverageRelationStatistics Valid=459, Invalid=2621, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:12:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73631 states. [2021-06-05 17:12:20,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73631 to 50482. [2021-06-05 17:12:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50482 states, 50481 states have (on average 3.878171985499495) internal successors, (195774), 50481 states have internal predecessors, (195774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50482 states to 50482 states and 195774 transitions. [2021-06-05 17:12:20,968 INFO L78 Accepts]: Start accepts. Automaton has 50482 states and 195774 transitions. Word has length 30 [2021-06-05 17:12:20,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:20,968 INFO L482 AbstractCegarLoop]: Abstraction has 50482 states and 195774 transitions. [2021-06-05 17:12:20,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) 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 17:12:20,968 INFO L276 IsEmpty]: Start isEmpty. Operand 50482 states and 195774 transitions. [2021-06-05 17:12:21,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:21,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:21,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:21,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 17:12:21,240 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:21,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:21,240 INFO L82 PathProgramCache]: Analyzing trace with hash 270756119, now seen corresponding path program 196 times [2021-06-05 17:12:21,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:21,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703987877] [2021-06-05 17:12:21,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:21,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:21,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703987877] [2021-06-05 17:12:21,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703987877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:21,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105201996] [2021-06-05 17:12:21,377 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:21,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:12:21,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:21,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:12:21,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:21,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:21,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:12:21,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:21,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:21,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:21,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:12:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:21,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105201996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:21,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:21,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:12:21,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154482317] [2021-06-05 17:12:21,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:21,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:21,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:21,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:21,721 INFO L87 Difference]: Start difference. First operand 50482 states and 195774 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:27,502 INFO L93 Difference]: Finished difference Result 89554 states and 331893 transitions. [2021-06-05 17:12:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 17:12:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:27,720 INFO L225 Difference]: With dead ends: 89554 [2021-06-05 17:12:27,721 INFO L226 Difference]: Without dead ends: 89509 [2021-06-05 17:12:27,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 3875.3ms TimeCoverageRelationStatistics Valid=898, Invalid=7474, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 17:12:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89509 states. [2021-06-05 17:12:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89509 to 50513. [2021-06-05 17:12:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50513 states, 50512 states have (on average 3.8782467532467533) internal successors, (195898), 50512 states have internal predecessors, (195898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50513 states to 50513 states and 195898 transitions. [2021-06-05 17:12:29,166 INFO L78 Accepts]: Start accepts. Automaton has 50513 states and 195898 transitions. Word has length 30 [2021-06-05 17:12:29,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:29,166 INFO L482 AbstractCegarLoop]: Abstraction has 50513 states and 195898 transitions. [2021-06-05 17:12:29,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:29,166 INFO L276 IsEmpty]: Start isEmpty. Operand 50513 states and 195898 transitions. [2021-06-05 17:12:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:29,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:29,237 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:29,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:29,437 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:29,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:29,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1364847707, now seen corresponding path program 197 times [2021-06-05 17:12:29,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:29,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076976430] [2021-06-05 17:12:29,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:29,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076976430] [2021-06-05 17:12:29,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076976430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132201804] [2021-06-05 17:12:29,575 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:29,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:12:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:12:29,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:29,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:29,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:29,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 49 [2021-06-05 17:12:29,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:12:29,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:29,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:29,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:17 [2021-06-05 17:12:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:29,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132201804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:29,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:29,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:12:29,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235708466] [2021-06-05 17:12:29,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:29,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:29,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:29,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:29,829 INFO L87 Difference]: Start difference. First operand 50513 states and 195898 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 17:12:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:36,009 INFO L93 Difference]: Finished difference Result 88714 states and 329526 transitions. [2021-06-05 17:12:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-06-05 17:12:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 17:12:36,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:36,332 INFO L225 Difference]: With dead ends: 88714 [2021-06-05 17:12:36,333 INFO L226 Difference]: Without dead ends: 88684 [2021-06-05 17:12:36,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4245.2ms TimeCoverageRelationStatistics Valid=976, Invalid=10366, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 17:12:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88684 states. [2021-06-05 17:12:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88684 to 50507. [2021-06-05 17:12:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50507 states, 50506 states have (on average 3.8780936918385933) internal successors, (195867), 50506 states have internal predecessors, (195867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50507 states to 50507 states and 195867 transitions. [2021-06-05 17:12:37,694 INFO L78 Accepts]: Start accepts. Automaton has 50507 states and 195867 transitions. Word has length 30 [2021-06-05 17:12:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:37,694 INFO L482 AbstractCegarLoop]: Abstraction has 50507 states and 195867 transitions. [2021-06-05 17:12:37,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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 17:12:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 50507 states and 195867 transitions. [2021-06-05 17:12:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:37,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:37,766 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:37,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable754 [2021-06-05 17:12:37,966 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:37,966 INFO L82 PathProgramCache]: Analyzing trace with hash -781323053, now seen corresponding path program 198 times [2021-06-05 17:12:37,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:37,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418528740] [2021-06-05 17:12:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:38,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418528740] [2021-06-05 17:12:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418528740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:38,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752797156] [2021-06-05 17:12:38,102 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:38,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:12:38,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:38,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:12:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:38,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:38,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:38,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:12:38,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:38,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:38,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:38,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:12:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:38,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752797156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:38,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:38,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:12:38,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305523178] [2021-06-05 17:12:38,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:38,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:38,373 INFO L87 Difference]: Start difference. First operand 50507 states and 195867 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:39,877 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-06-05 17:12:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:43,453 INFO L93 Difference]: Finished difference Result 99478 states and 365820 transitions. [2021-06-05 17:12:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 17:12:43,453 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:43,717 INFO L225 Difference]: With dead ends: 99478 [2021-06-05 17:12:43,717 INFO L226 Difference]: Without dead ends: 99448 [2021-06-05 17:12:43,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 3683.0ms TimeCoverageRelationStatistics Valid=1062, Invalid=7868, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 17:12:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99448 states. [2021-06-05 17:12:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99448 to 50525. [2021-06-05 17:12:45,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50525 states, 50524 states have (on average 3.8780777452299895) internal successors, (195936), 50524 states have internal predecessors, (195936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50525 states to 50525 states and 195936 transitions. [2021-06-05 17:12:45,261 INFO L78 Accepts]: Start accepts. Automaton has 50525 states and 195936 transitions. Word has length 30 [2021-06-05 17:12:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:45,261 INFO L482 AbstractCegarLoop]: Abstraction has 50525 states and 195936 transitions. [2021-06-05 17:12:45,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 50525 states and 195936 transitions. [2021-06-05 17:12:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:45,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:45,334 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:45,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:45,534 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:45,535 INFO L82 PathProgramCache]: Analyzing trace with hash 25852971, now seen corresponding path program 199 times [2021-06-05 17:12:45,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:45,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614369749] [2021-06-05 17:12:45,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:45,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:45,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614369749] [2021-06-05 17:12:45,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614369749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:45,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681437382] [2021-06-05 17:12:45,766 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:12:45,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:46,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:12:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:46,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:46,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:12:46,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:12:46,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:46,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:46,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-06-05 17:12:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:46,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681437382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:46,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:46,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 17:12:46,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635051706] [2021-06-05 17:12:46,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:12:46,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:46,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:12:46,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:12:46,327 INFO L87 Difference]: Start difference. First operand 50525 states and 195936 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:12:48,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:48,225 INFO L93 Difference]: Finished difference Result 77721 states and 294719 transitions. [2021-06-05 17:12:48,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:12:48,226 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:12:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:48,427 INFO L225 Difference]: With dead ends: 77721 [2021-06-05 17:12:48,427 INFO L226 Difference]: Without dead ends: 77706 [2021-06-05 17:12:48,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1546.6ms TimeCoverageRelationStatistics Valid=400, Invalid=1670, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 17:12:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77706 states. [2021-06-05 17:12:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77706 to 50552. [2021-06-05 17:12:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50552 states, 50551 states have (on average 3.878043955609187) internal successors, (196039), 50551 states have internal predecessors, (196039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50552 states to 50552 states and 196039 transitions. [2021-06-05 17:12:49,858 INFO L78 Accepts]: Start accepts. Automaton has 50552 states and 196039 transitions. Word has length 30 [2021-06-05 17:12:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:49,858 INFO L482 AbstractCegarLoop]: Abstraction has 50552 states and 196039 transitions. [2021-06-05 17:12:49,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:12:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 50552 states and 196039 transitions. [2021-06-05 17:12:49,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:49,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:49,929 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:50,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable758 [2021-06-05 17:12:50,129 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:50,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:50,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1615723347, now seen corresponding path program 200 times [2021-06-05 17:12:50,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:50,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557615224] [2021-06-05 17:12:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:50,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:50,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557615224] [2021-06-05 17:12:50,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557615224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:50,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117185935] [2021-06-05 17:12:50,345 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:50,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:12:50,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:50,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:12:50,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:50,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:50,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:50,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:50,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-06-05 17:12:50,514 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 17:12:50,519 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:50,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:50,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 17:12:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:50,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117185935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:50,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:50,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 17:12:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854701183] [2021-06-05 17:12:50,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:12:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:12:50,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:12:50,552 INFO L87 Difference]: Start difference. First operand 50552 states and 196039 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 17:12:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:53,024 INFO L93 Difference]: Finished difference Result 77561 states and 294327 transitions. [2021-06-05 17:12:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:12:53,025 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 17:12:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:53,220 INFO L225 Difference]: With dead ends: 77561 [2021-06-05 17:12:53,220 INFO L226 Difference]: Without dead ends: 77546 [2021-06-05 17:12:53,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1632.0ms TimeCoverageRelationStatistics Valid=480, Invalid=2600, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 17:12:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77546 states. [2021-06-05 17:12:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77546 to 50543. [2021-06-05 17:12:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50543 states, 50542 states have (on average 3.8782596652289185) internal successors, (196015), 50542 states have internal predecessors, (196015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50543 states to 50543 states and 196015 transitions. [2021-06-05 17:12:54,601 INFO L78 Accepts]: Start accepts. Automaton has 50543 states and 196015 transitions. Word has length 30 [2021-06-05 17:12:54,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:54,601 INFO L482 AbstractCegarLoop]: Abstraction has 50543 states and 196015 transitions. [2021-06-05 17:12:54,601 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 17:12:54,601 INFO L276 IsEmpty]: Start isEmpty. Operand 50543 states and 196015 transitions. [2021-06-05 17:12:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:54,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:54,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:12:54,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:54,872 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:12:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:12:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2130621987, now seen corresponding path program 201 times [2021-06-05 17:12:54,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:12:54,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096085956] [2021-06-05 17:12:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:12:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:12:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:55,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:12:55,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096085956] [2021-06-05 17:12:55,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096085956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:55,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108318785] [2021-06-05 17:12:55,007 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:12:55,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:12:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:12:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:12:55,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:12:55,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:55,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:12:55,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:55,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 57 [2021-06-05 17:12:55,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:12:55,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:12:55,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:12:55,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-06-05 17:12:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:12:55,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108318785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:12:55,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:12:55,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:12:55,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463639171] [2021-06-05 17:12:55,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:12:55,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:12:55,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:12:55,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:12:55,543 INFO L87 Difference]: Start difference. First operand 50543 states and 196015 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:12:58,037 INFO L93 Difference]: Finished difference Result 98552 states and 363159 transitions. [2021-06-05 17:12:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 17:12:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:12:58,325 INFO L225 Difference]: With dead ends: 98552 [2021-06-05 17:12:58,325 INFO L226 Difference]: Without dead ends: 98537 [2021-06-05 17:12:58,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1534.7ms TimeCoverageRelationStatistics Valid=415, Invalid=2555, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 17:12:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98537 states. [2021-06-05 17:12:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98537 to 50554. [2021-06-05 17:12:59,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50554 states, 50553 states have (on average 3.8781872490257747) internal successors, (196054), 50553 states have internal predecessors, (196054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:12:59,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50554 states to 50554 states and 196054 transitions. [2021-06-05 17:12:59,840 INFO L78 Accepts]: Start accepts. Automaton has 50554 states and 196054 transitions. Word has length 30 [2021-06-05 17:12:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:12:59,840 INFO L482 AbstractCegarLoop]: Abstraction has 50554 states and 196054 transitions. [2021-06-05 17:12:59,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:12:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 50554 states and 196054 transitions. [2021-06-05 17:12:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:12:59,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:12:59,910 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:00,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 17:13:00,111 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash 636714265, now seen corresponding path program 202 times [2021-06-05 17:13:00,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:00,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923804580] [2021-06-05 17:13:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:00,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:00,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923804580] [2021-06-05 17:13:00,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923804580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:00,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425952076] [2021-06-05 17:13:00,262 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:00,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:13:00,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 17:13:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:00,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:00,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:00,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:00,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:13:00,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:00,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:00,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:00,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:15 [2021-06-05 17:13:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:00,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425952076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:00,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:00,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 17:13:00,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134553456] [2021-06-05 17:13:00,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 17:13:00,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:00,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 17:13:00,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:13:00,603 INFO L87 Difference]: Start difference. First operand 50554 states and 196054 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 17:13:04,542 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 17:13:05,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:05,058 INFO L93 Difference]: Finished difference Result 87806 states and 326906 transitions. [2021-06-05 17:13:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:13:05,059 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 17:13:05,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:05,269 INFO L225 Difference]: With dead ends: 87806 [2021-06-05 17:13:05,269 INFO L226 Difference]: Without dead ends: 87758 [2021-06-05 17:13:05,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2408 ImplicationChecksByTransitivity, 3121.3ms TimeCoverageRelationStatistics Valid=870, Invalid=6270, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 17:13:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87758 states. [2021-06-05 17:13:06,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87758 to 50572. [2021-06-05 17:13:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50572 states, 50571 states have (on average 3.877854897075399) internal successors, (196107), 50571 states have internal predecessors, (196107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50572 states to 50572 states and 196107 transitions. [2021-06-05 17:13:06,707 INFO L78 Accepts]: Start accepts. Automaton has 50572 states and 196107 transitions. Word has length 30 [2021-06-05 17:13:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:06,707 INFO L482 AbstractCegarLoop]: Abstraction has 50572 states and 196107 transitions. [2021-06-05 17:13:06,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 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 17:13:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 50572 states and 196107 transitions. [2021-06-05 17:13:06,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:06,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:06,779 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:06,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:06,979 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:06,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:06,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1155811945, now seen corresponding path program 203 times [2021-06-05 17:13:06,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:06,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692331395] [2021-06-05 17:13:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:06,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:07,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:07,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692331395] [2021-06-05 17:13:07,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692331395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:07,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295752331] [2021-06-05 17:13:07,115 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:07,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:13:07,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 17:13:07,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:07,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:07,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:07,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:07,671 INFO L244 Elim1Store]: Index analysis took 219 ms [2021-06-05 17:13:07,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 17:13:07,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:07,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:07,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:07,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:3 [2021-06-05 17:13:07,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:07,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295752331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:07,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:07,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:13:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524470587] [2021-06-05 17:13:07,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:13:07,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:07,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:13:07,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:13:07,700 INFO L87 Difference]: Start difference. First operand 50572 states and 196107 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:13:11,083 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-05 17:13:13,137 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-05 17:13:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:13,737 INFO L93 Difference]: Finished difference Result 99700 states and 367419 transitions. [2021-06-05 17:13:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 17:13:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:13:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:13,995 INFO L225 Difference]: With dead ends: 99700 [2021-06-05 17:13:13,995 INFO L226 Difference]: Without dead ends: 99670 [2021-06-05 17:13:13,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4350.6ms TimeCoverageRelationStatistics Valid=1197, Invalid=7545, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 17:13:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99670 states. [2021-06-05 17:13:15,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99670 to 50590. [2021-06-05 17:13:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-06-05 17:13:15,583 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-06-05 17:13:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:15,583 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-06-05 17:13:15,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:13:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-06-05 17:13:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:15,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:15,655 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:15,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:15,855 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:15,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1521622571, now seen corresponding path program 204 times [2021-06-05 17:13:15,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:15,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265664613] [2021-06-05 17:13:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:16,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:16,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265664613] [2021-06-05 17:13:16,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265664613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:16,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460503236] [2021-06-05 17:13:16,004 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:16,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:13:16,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:16,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:13:16,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:16,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:16,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:16,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 67 [2021-06-05 17:13:16,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:13:16,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:16,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:16,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:35 [2021-06-05 17:13:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:16,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460503236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:16,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:16,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:13:16,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565811328] [2021-06-05 17:13:16,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:13:16,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:16,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:13:16,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:13:16,327 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) 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 17:13:17,906 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 17:13:21,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:21,201 INFO L93 Difference]: Finished difference Result 97442 states and 361782 transitions. [2021-06-05 17:13:21,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 17:13:21,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:13:21,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:21,430 INFO L225 Difference]: With dead ends: 97442 [2021-06-05 17:13:21,430 INFO L226 Difference]: Without dead ends: 97427 [2021-06-05 17:13:21,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 3301.4ms TimeCoverageRelationStatistics Valid=921, Invalid=5241, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 17:13:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97427 states. [2021-06-05 17:13:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97427 to 50590. [2021-06-05 17:13:22,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50590 states, 50589 states have (on average 3.8781355630670697) internal successors, (196191), 50589 states have internal predecessors, (196191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50590 states to 50590 states and 196191 transitions. [2021-06-05 17:13:22,957 INFO L78 Accepts]: Start accepts. Automaton has 50590 states and 196191 transitions. Word has length 30 [2021-06-05 17:13:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:22,957 INFO L482 AbstractCegarLoop]: Abstraction has 50590 states and 196191 transitions. [2021-06-05 17:13:22,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) 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 17:13:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 50590 states and 196191 transitions. [2021-06-05 17:13:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:23,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:23,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:23,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:23,229 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash -725796723, now seen corresponding path program 205 times [2021-06-05 17:13:23,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:23,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753026472] [2021-06-05 17:13:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:23,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753026472] [2021-06-05 17:13:23,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753026472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:23,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525946050] [2021-06-05 17:13:23,403 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:13:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:23,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:23,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:23,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 39 [2021-06-05 17:13:23,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 17:13:23,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:23,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:23,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:17 [2021-06-05 17:13:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:23,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525946050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:23,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:23,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 17:13:23,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449125516] [2021-06-05 17:13:23,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:13:23,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:23,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:13:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:13:23,630 INFO L87 Difference]: Start difference. First operand 50590 states and 196191 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:13:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:27,044 INFO L93 Difference]: Finished difference Result 74459 states and 279252 transitions. [2021-06-05 17:13:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 17:13:27,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:13:27,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:27,219 INFO L225 Difference]: With dead ends: 74459 [2021-06-05 17:13:27,219 INFO L226 Difference]: Without dead ends: 74429 [2021-06-05 17:13:27,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2362.3ms TimeCoverageRelationStatistics Valid=596, Invalid=3064, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 17:13:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74429 states. [2021-06-05 17:13:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74429 to 50603. [2021-06-05 17:13:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50603 states, 50602 states have (on average 3.878364491522074) internal successors, (196253), 50602 states have internal predecessors, (196253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50603 states to 50603 states and 196253 transitions. [2021-06-05 17:13:28,466 INFO L78 Accepts]: Start accepts. Automaton has 50603 states and 196253 transitions. Word has length 30 [2021-06-05 17:13:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:28,466 INFO L482 AbstractCegarLoop]: Abstraction has 50603 states and 196253 transitions. [2021-06-05 17:13:28,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 21 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 17:13:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50603 states and 196253 transitions. [2021-06-05 17:13:28,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:28,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:28,537 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:28,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:28,738 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:28,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:28,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1490477859, now seen corresponding path program 206 times [2021-06-05 17:13:28,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:28,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597868746] [2021-06-05 17:13:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:28,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:28,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:28,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597868746] [2021-06-05 17:13:28,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597868746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:28,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759458985] [2021-06-05 17:13:28,870 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:28,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:13:28,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 17:13:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:29,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:29,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:29,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 17:13:29,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:29,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:29,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:29,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:3 [2021-06-05 17:13:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:29,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759458985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:29,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:29,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 17:13:29,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024727939] [2021-06-05 17:13:29,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 17:13:29,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 17:13:29,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:13:29,151 INFO L87 Difference]: Start difference. First operand 50603 states and 196253 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 17:13:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:33,400 INFO L93 Difference]: Finished difference Result 88595 states and 329278 transitions. [2021-06-05 17:13:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 17:13:33,400 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 17:13:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:33,609 INFO L225 Difference]: With dead ends: 88595 [2021-06-05 17:13:33,610 INFO L226 Difference]: Without dead ends: 88580 [2021-06-05 17:13:33,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2734.3ms TimeCoverageRelationStatistics Valid=752, Invalid=6054, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 17:13:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88580 states. [2021-06-05 17:13:34,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88580 to 50612. [2021-06-05 17:13:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-06-05 17:13:35,024 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-06-05 17:13:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:35,024 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-06-05 17:13:35,024 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 17:13:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-06-05 17:13:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:35,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:35,095 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:35,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-06-05 17:13:35,296 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:35,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1594859171, now seen corresponding path program 91 times [2021-06-05 17:13:35,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:35,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718542938] [2021-06-05 17:13:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:35,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718542938] [2021-06-05 17:13:35,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718542938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491825312] [2021-06-05 17:13:35,603 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:35,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:13:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:35,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:35,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:35,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:35,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:35,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:35,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:35,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:13:35,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:35,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:35,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:35,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 17:13:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:35,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491825312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:35,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:35,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 17:13:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288753643] [2021-06-05 17:13:35,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:13:35,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:35,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:13:35,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:13:35,844 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:13:38,301 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-06-05 17:13:38,828 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-06-05 17:13:39,597 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-06-05 17:13:39,832 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-06-05 17:13:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:41,071 INFO L93 Difference]: Finished difference Result 64130 states and 241390 transitions. [2021-06-05 17:13:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:13:41,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:13:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:41,226 INFO L225 Difference]: With dead ends: 64130 [2021-06-05 17:13:41,226 INFO L226 Difference]: Without dead ends: 64115 [2021-06-05 17:13:41,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 4365.4ms TimeCoverageRelationStatistics Valid=783, Invalid=4767, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:13:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64115 states. [2021-06-05 17:13:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64115 to 50612. [2021-06-05 17:13:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50612 states, 50611 states have (on average 3.878208294639505) internal successors, (196280), 50611 states have internal predecessors, (196280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50612 states to 50612 states and 196280 transitions. [2021-06-05 17:13:42,365 INFO L78 Accepts]: Start accepts. Automaton has 50612 states and 196280 transitions. Word has length 30 [2021-06-05 17:13:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:42,365 INFO L482 AbstractCegarLoop]: Abstraction has 50612 states and 196280 transitions. [2021-06-05 17:13:42,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:13:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 50612 states and 196280 transitions. [2021-06-05 17:13:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:42,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:42,437 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:42,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable785 [2021-06-05 17:13:42,638 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:42,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:42,638 INFO L82 PathProgramCache]: Analyzing trace with hash -344679385, now seen corresponding path program 92 times [2021-06-05 17:13:42,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:42,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245059379] [2021-06-05 17:13:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:42,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:42,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245059379] [2021-06-05 17:13:42,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245059379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:42,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724249948] [2021-06-05 17:13:42,950 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:42,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:13:42,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:42,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 17:13:42,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:43,265 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 17:13:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:43,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:43,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:43,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 17:13:43,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 17:13:43,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:13:43,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:43,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:43,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:3 [2021-06-05 17:13:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:43,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724249948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:43,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:43,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-06-05 17:13:43,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289356007] [2021-06-05 17:13:43,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 17:13:43,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:43,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 17:13:43,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 17:13:43,406 INFO L87 Difference]: Start difference. First operand 50612 states and 196280 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:13:45,581 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-06-05 17:13:45,994 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-06-05 17:13:46,314 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-06-05 17:13:46,966 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2021-06-05 17:13:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:48,330 INFO L93 Difference]: Finished difference Result 64415 states and 242251 transitions. [2021-06-05 17:13:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 17:13:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:13:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:48,490 INFO L225 Difference]: With dead ends: 64415 [2021-06-05 17:13:48,490 INFO L226 Difference]: Without dead ends: 64400 [2021-06-05 17:13:48,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 4135.8ms TimeCoverageRelationStatistics Valid=826, Invalid=4724, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 17:13:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64400 states. [2021-06-05 17:13:49,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64400 to 50619. [2021-06-05 17:13:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50619 states, 50618 states have (on average 3.878323916393378) internal successors, (196313), 50618 states have internal predecessors, (196313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50619 states to 50619 states and 196313 transitions. [2021-06-05 17:13:49,648 INFO L78 Accepts]: Start accepts. Automaton has 50619 states and 196313 transitions. Word has length 30 [2021-06-05 17:13:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:49,648 INFO L482 AbstractCegarLoop]: Abstraction has 50619 states and 196313 transitions. [2021-06-05 17:13:49,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 17:13:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 50619 states and 196313 transitions. [2021-06-05 17:13:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:49,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:49,720 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:49,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable786,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:49,921 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1320998229, now seen corresponding path program 93 times [2021-06-05 17:13:49,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:49,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453267748] [2021-06-05 17:13:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:50,159 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-06-05 17:13:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:50,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:50,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453267748] [2021-06-05 17:13:50,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453267748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:50,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756915709] [2021-06-05 17:13:50,319 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:50,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:13:50,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:13:50,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:50,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:50,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:50,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 67 [2021-06-05 17:13:50,609 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 3 xjuncts. [2021-06-05 17:13:50,625 INFO L628 ElimStorePlain]: treesize reduction 19, result has 54.8 percent of original size [2021-06-05 17:13:50,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:13:50,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:35 [2021-06-05 17:13:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:50,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756915709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:50,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:13:50,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-06-05 17:13:50,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985277238] [2021-06-05 17:13:50,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 17:13:50,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:13:50,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 17:13:50,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:13:50,688 INFO L87 Difference]: Start difference. First operand 50619 states and 196313 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 17:13:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:13:53,722 INFO L93 Difference]: Finished difference Result 88005 states and 327696 transitions. [2021-06-05 17:13:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:13:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 17:13:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:13:53,936 INFO L225 Difference]: With dead ends: 88005 [2021-06-05 17:13:53,936 INFO L226 Difference]: Without dead ends: 87990 [2021-06-05 17:13:53,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 2271.5ms TimeCoverageRelationStatistics Valid=444, Invalid=3338, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 17:13:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87990 states. [2021-06-05 17:13:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87990 to 50624. [2021-06-05 17:13:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50624 states, 50623 states have (on average 3.878217411058215) internal successors, (196327), 50623 states have internal predecessors, (196327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:13:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50624 states to 50624 states and 196327 transitions. [2021-06-05 17:13:55,377 INFO L78 Accepts]: Start accepts. Automaton has 50624 states and 196327 transitions. Word has length 30 [2021-06-05 17:13:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:13:55,377 INFO L482 AbstractCegarLoop]: Abstraction has 50624 states and 196327 transitions. [2021-06-05 17:13:55,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 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 17:13:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 50624 states and 196327 transitions. [2021-06-05 17:13:55,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 17:13:55,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:13:55,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:13:55,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable787 [2021-06-05 17:13:55,648 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:13:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:13:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 241742567, now seen corresponding path program 207 times [2021-06-05 17:13:55,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:13:55,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539134810] [2021-06-05 17:13:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:13:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:13:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:13:55,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:13:55,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539134810] [2021-06-05 17:13:55,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539134810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:13:55,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580271126] [2021-06-05 17:13:55,786 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:13:55,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:13:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:13:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:13:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:13:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 17:13:56,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:13:56,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 85 [2021-06-05 17:13:56,309 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 88