/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 20:25:02,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 20:25:02,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 20:25:02,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 20:25:02,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 20:25:02,614 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 20:25:02,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 20:25:02,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 20:25:02,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 20:25:02,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 20:25:02,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 20:25:02,615 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 20:25:02,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 20:25:02,616 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 20:25:02,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 20:25:02,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 20:25:02,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 20:25:02,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 20:25:02,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 20:25:02,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 20:25:02,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 20:25:02,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 20:25:02,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 20:25:02,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 20:25:02,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 20:25:02,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 20:25:02,618 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 20:25:02,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 20:25:02,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:25:02,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 20:25:02,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 20:25:02,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 20:25:02,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 20:25:02,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 20:25:02,619 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 20:25:02,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 20:25:02,619 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 20:25:02,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 20:25:02,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 20:25:02,975 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 20:25:02,976 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 20:25:02,979 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 20:25:02,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl [2021-07-13 20:25:02,980 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-series-array.wvr.bpl' [2021-07-13 20:25:03,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 20:25:03,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 20:25:03,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 20:25:03,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 20:25:03,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 20:25:03,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 20:25:03,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 20:25:03,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 20:25:03,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 20:25:03,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,082 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,084 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... [2021-07-13 20:25:03,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 20:25:03,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 20:25:03,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 20:25:03,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 20:25:03,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 20:25:03,156 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 20:25:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 20:25:03,156 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 20:25:03,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 20:25:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 20:25:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 20:25:03,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 20:25:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 20:25:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 20:25:03,157 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 20:25:03,157 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 20:25:03,157 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 20:25:03,158 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-07-13 20:25:03,158 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-07-13 20:25:03,158 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-07-13 20:25:03,159 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 20:25:03,376 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 20:25:03,377 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 20:25:03,378 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:25:03 BoogieIcfgContainer [2021-07-13 20:25:03,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 20:25:03,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 20:25:03,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 20:25:03,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 20:25:03,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 08:25:03" (1/2) ... [2021-07-13 20:25:03,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38597135 and model type buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:25:03, skipping insertion in model container [2021-07-13 20:25:03,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:25:03" (2/2) ... [2021-07-13 20:25:03,385 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-series-array.wvr.bpl [2021-07-13 20:25:03,390 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 20:25:03,390 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 20:25:03,391 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 20:25:03,391 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 20:25:03,434 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 20:25:03,459 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-07-13 20:25:03,476 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 20:25:03,476 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 20:25:03,476 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 20:25:03,477 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 20:25:03,477 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 20:25:03,477 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 20:25:03,477 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 20:25:03,477 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 20:25:03,486 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-07-13 20:25:03,560 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 20:25:03,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:03,597 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:03,597 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:03,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-07-13 20:25:03,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:03,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262610373] [2021-07-13 20:25:03,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:03,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:03,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262610373] [2021-07-13 20:25:03,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262610373] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:03,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:03,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 20:25:03,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212169013] [2021-07-13 20:25:03,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 20:25:03,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 20:25:03,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:25:03,837 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 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 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:03,933 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-07-13 20:25:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 20:25:03,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 20:25:03,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:03,972 INFO L225 Difference]: With dead ends: 1236 [2021-07-13 20:25:03,973 INFO L226 Difference]: Without dead ends: 1109 [2021-07-13 20:25:03,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 20:25:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-07-13 20:25:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-07-13 20:25:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-07-13 20:25:04,103 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-07-13 20:25:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:04,104 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-07-13 20:25:04,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-07-13 20:25:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:25:04,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:04,110 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:04,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 20:25:04,111 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:04,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-07-13 20:25:04,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:04,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459137589] [2021-07-13 20:25:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:04,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:04,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459137589] [2021-07-13 20:25:04,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459137589] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:04,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:04,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:04,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868284355] [2021-07-13 20:25:04,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:04,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:04,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:04,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:04,199 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:04,260 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-07-13 20:25:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:04,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:25:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:04,276 INFO L225 Difference]: With dead ends: 1524 [2021-07-13 20:25:04,276 INFO L226 Difference]: Without dead ends: 1418 [2021-07-13 20:25:04,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-07-13 20:25:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-07-13 20:25:04,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-07-13 20:25:04,343 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-07-13 20:25:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:04,344 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-07-13 20:25:04,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-07-13 20:25:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 20:25:04,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:04,349 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:04,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 20:25:04,349 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:04,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:04,350 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-07-13 20:25:04,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:04,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213231989] [2021-07-13 20:25:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:04,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:04,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213231989] [2021-07-13 20:25:04,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213231989] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:04,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:04,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:04,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092592314] [2021-07-13 20:25:04,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:04,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:04,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:04,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:04,401 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:04,463 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-07-13 20:25:04,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 20:25:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:04,482 INFO L225 Difference]: With dead ends: 2017 [2021-07-13 20:25:04,482 INFO L226 Difference]: Without dead ends: 1875 [2021-07-13 20:25:04,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:04,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-07-13 20:25:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-07-13 20:25:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-07-13 20:25:04,588 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-07-13 20:25:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:04,589 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-07-13 20:25:04,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-07-13 20:25:04,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:04,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:04,603 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:04,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 20:25:04,604 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-07-13 20:25:04,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:04,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033860512] [2021-07-13 20:25:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:04,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:04,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033860512] [2021-07-13 20:25:04,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033860512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:04,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035030802] [2021-07-13 20:25:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:04,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:25:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:04,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035030802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:04,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:04,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-07-13 20:25:04,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750286687] [2021-07-13 20:25:04,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:25:04,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:04,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:25:04,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:04,944 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-07-13 20:25:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:05,134 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-07-13 20:25:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:25:05,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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 [2021-07-13 20:25:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:05,150 INFO L225 Difference]: With dead ends: 2308 [2021-07-13 20:25:05,150 INFO L226 Difference]: Without dead ends: 2108 [2021-07-13 20:25:05,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:05,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-07-13 20:25:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-07-13 20:25:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-07-13 20:25:05,258 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-07-13 20:25:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:05,258 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-07-13 20:25:05,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 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) [2021-07-13 20:25:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-07-13 20:25:05,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:05,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:05,265 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:05,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:05,489 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash -239710988, now seen corresponding path program 1 times [2021-07-13 20:25:05,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:05,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567949036] [2021-07-13 20:25:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:05,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567949036] [2021-07-13 20:25:05,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567949036] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:05,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:05,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:05,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393336598] [2021-07-13 20:25:05,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:05,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:05,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:05,525 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:05,626 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-07-13 20:25:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:05,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:25:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:05,655 INFO L225 Difference]: With dead ends: 1950 [2021-07-13 20:25:05,655 INFO L226 Difference]: Without dead ends: 1860 [2021-07-13 20:25:05,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:05,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-07-13 20:25:05,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-07-13 20:25:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-07-13 20:25:05,727 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-07-13 20:25:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:05,727 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-07-13 20:25:05,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-07-13 20:25:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:05,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:05,733 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:05,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 20:25:05,733 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:05,734 INFO L82 PathProgramCache]: Analyzing trace with hash -647935628, now seen corresponding path program 2 times [2021-07-13 20:25:05,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:05,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738379564] [2021-07-13 20:25:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:05,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:05,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738379564] [2021-07-13 20:25:05,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738379564] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:05,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:05,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432290773] [2021-07-13 20:25:05,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:05,794 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:05,880 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-07-13 20:25:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:05,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:25:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:05,888 INFO L225 Difference]: With dead ends: 1308 [2021-07-13 20:25:05,888 INFO L226 Difference]: Without dead ends: 1308 [2021-07-13 20:25:05,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-13 20:25:05,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-07-13 20:25:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-07-13 20:25:05,923 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-07-13 20:25:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:05,923 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-07-13 20:25:05,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-07-13 20:25:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 20:25:05,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:05,927 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:05,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 20:25:05,928 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:05,928 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-07-13 20:25:05,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:05,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955319804] [2021-07-13 20:25:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:05,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955319804] [2021-07-13 20:25:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955319804] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:05,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:05,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:05,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501680245] [2021-07-13 20:25:05,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:05,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:05,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:05,989 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:06,036 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-07-13 20:25:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-13 20:25:06,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:06,045 INFO L225 Difference]: With dead ends: 1142 [2021-07-13 20:25:06,045 INFO L226 Difference]: Without dead ends: 1120 [2021-07-13 20:25:06,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-13 20:25:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-07-13 20:25:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-07-13 20:25:06,082 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-07-13 20:25:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:06,082 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-07-13 20:25:06,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-07-13 20:25:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:25:06,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:06,088 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:06,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 20:25:06,088 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:06,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:06,089 INFO L82 PathProgramCache]: Analyzing trace with hash -236313260, now seen corresponding path program 1 times [2021-07-13 20:25:06,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:06,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065706865] [2021-07-13 20:25:06,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:06,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:06,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065706865] [2021-07-13 20:25:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065706865] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:06,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:06,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 20:25:06,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014681893] [2021-07-13 20:25:06,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:06,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:06,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:06,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:06,140 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:06,165 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2021-07-13 20:25:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:06,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:25:06,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:06,175 INFO L225 Difference]: With dead ends: 1334 [2021-07-13 20:25:06,176 INFO L226 Difference]: Without dead ends: 1334 [2021-07-13 20:25:06,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 20:25:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-07-13 20:25:06,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2021-07-13 20:25:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2021-07-13 20:25:06,211 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2021-07-13 20:25:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:06,212 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2021-07-13 20:25:06,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2021-07-13 20:25:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 20:25:06,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:06,219 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:06,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 20:25:06,219 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2123280916, now seen corresponding path program 1 times [2021-07-13 20:25:06,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:06,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017086935] [2021-07-13 20:25:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:06,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017086935] [2021-07-13 20:25:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017086935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385004055] [2021-07-13 20:25:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 20:25:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:06,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385004055] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:06,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:25:06,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-07-13 20:25:06,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654011363] [2021-07-13 20:25:06,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:06,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:06,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:06,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:06,415 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:06,452 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2021-07-13 20:25:06,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 20:25:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:06,464 INFO L225 Difference]: With dead ends: 1658 [2021-07-13 20:25:06,464 INFO L226 Difference]: Without dead ends: 1658 [2021-07-13 20:25:06,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2021-07-13 20:25:06,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2021-07-13 20:25:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2021-07-13 20:25:06,501 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2021-07-13 20:25:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:06,501 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2021-07-13 20:25:06,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2021-07-13 20:25:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:06,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:06,505 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:06,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:06,729 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:06,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1655387498, now seen corresponding path program 1 times [2021-07-13 20:25:06,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:06,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278061874] [2021-07-13 20:25:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:06,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278061874] [2021-07-13 20:25:06,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278061874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:06,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000511573] [2021-07-13 20:25:06,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:06,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:07,023 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 17 treesize of output 13 [2021-07-13 20:25:07,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:07,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:07,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:07,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:07,068 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 15 treesize of output 11 [2021-07-13 20:25:07,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:07,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:07,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:07,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:07,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000511573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:07,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:07,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:07,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700754179] [2021-07-13 20:25:07,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:07,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:07,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:07,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:07,131 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-07-13 20:25:07,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:07,404 INFO L93 Difference]: Finished difference Result 2437 states and 9137 transitions. [2021-07-13 20:25:07,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:25:07,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-07-13 20:25:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:07,416 INFO L225 Difference]: With dead ends: 2437 [2021-07-13 20:25:07,416 INFO L226 Difference]: Without dead ends: 2358 [2021-07-13 20:25:07,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-07-13 20:25:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1653. [2021-07-13 20:25:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.7421307506053267) internal successors, (6182), 1652 states have internal predecessors, (6182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 6182 transitions. [2021-07-13 20:25:07,474 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 6182 transitions. Word has length 29 [2021-07-13 20:25:07,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:07,474 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 6182 transitions. [2021-07-13 20:25:07,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-07-13 20:25:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 6182 transitions. [2021-07-13 20:25:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:07,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:07,481 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:07,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 20:25:07,697 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1973616880, now seen corresponding path program 2 times [2021-07-13 20:25:07,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:07,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294425934] [2021-07-13 20:25:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:07,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:07,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294425934] [2021-07-13 20:25:07,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294425934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:07,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345501354] [2021-07-13 20:25:07,867 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:07,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:07,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:07,995 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 17 treesize of output 13 [2021-07-13 20:25:07,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:08,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:08,039 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 15 treesize of output 11 [2021-07-13 20:25:08,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:08,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:08,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345501354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:08,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:08,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:08,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629854015] [2021-07-13 20:25:08,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:08,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:08,087 INFO L87 Difference]: Start difference. First operand 1653 states and 6182 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-07-13 20:25:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:08,304 INFO L93 Difference]: Finished difference Result 2489 states and 9353 transitions. [2021-07-13 20:25:08,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:25:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29 [2021-07-13 20:25:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:08,316 INFO L225 Difference]: With dead ends: 2489 [2021-07-13 20:25:08,317 INFO L226 Difference]: Without dead ends: 2410 [2021-07-13 20:25:08,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2021-07-13 20:25:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 1791. [2021-07-13 20:25:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.7452513966480447) internal successors, (6704), 1790 states have internal predecessors, (6704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6704 transitions. [2021-07-13 20:25:08,379 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6704 transitions. Word has length 29 [2021-07-13 20:25:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:08,380 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6704 transitions. [2021-07-13 20:25:08,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-07-13 20:25:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6704 transitions. [2021-07-13 20:25:08,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:08,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:08,387 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:08,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:08,606 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash -2042339794, now seen corresponding path program 3 times [2021-07-13 20:25:08,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:08,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258081489] [2021-07-13 20:25:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:08,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:08,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258081489] [2021-07-13 20:25:08,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258081489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:08,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688080319] [2021-07-13 20:25:08,775 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:08,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:08,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:08,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:08,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:08,896 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 13 treesize of output 9 [2021-07-13 20:25:08,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:08,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-07-13 20:25:08,932 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 15 treesize of output 11 [2021-07-13 20:25:08,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:08,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:08,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688080319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:08,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:08,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:08,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794559302] [2021-07-13 20:25:08,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:08,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:08,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:08,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:08,984 INFO L87 Difference]: Start difference. First operand 1791 states and 6704 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-07-13 20:25:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:09,164 INFO L93 Difference]: Finished difference Result 3013 states and 11337 transitions. [2021-07-13 20:25:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 20:25:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 29 [2021-07-13 20:25:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:09,176 INFO L225 Difference]: With dead ends: 3013 [2021-07-13 20:25:09,177 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 20:25:09,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 20:25:09,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1887. [2021-07-13 20:25:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:09,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2021-07-13 20:25:09,238 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2021-07-13 20:25:09,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:09,239 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2021-07-13 20:25:09,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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) [2021-07-13 20:25:09,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2021-07-13 20:25:09,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:09,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:09,245 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:09,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 20:25:09,469 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:09,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:09,470 INFO L82 PathProgramCache]: Analyzing trace with hash 582053582, now seen corresponding path program 4 times [2021-07-13 20:25:09,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:09,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930894858] [2021-07-13 20:25:09,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:09,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:09,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:09,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930894858] [2021-07-13 20:25:09,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930894858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:09,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465170536] [2021-07-13 20:25:09,624 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:09,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:09,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 20:25:09,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:09,721 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 17 treesize of output 13 [2021-07-13 20:25:09,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:09,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:09,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:09,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:09,758 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 15 treesize of output 11 [2021-07-13 20:25:09,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:09,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:09,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:09,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:09,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465170536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:09,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:09,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:09,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094630487] [2021-07-13 20:25:09,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:09,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:09,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:09,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:09,807 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-07-13 20:25:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:10,061 INFO L93 Difference]: Finished difference Result 3013 states and 11358 transitions. [2021-07-13 20:25:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:25:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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 29 [2021-07-13 20:25:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:10,073 INFO L225 Difference]: With dead ends: 3013 [2021-07-13 20:25:10,073 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 20:25:10,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:25:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 20:25:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2081. [2021-07-13 20:25:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2021-07-13 20:25:10,139 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2021-07-13 20:25:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:10,139 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2021-07-13 20:25:10,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 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) [2021-07-13 20:25:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2021-07-13 20:25:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:10,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:10,146 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:10,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:10,361 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash -83909336, now seen corresponding path program 5 times [2021-07-13 20:25:10,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:10,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997636886] [2021-07-13 20:25:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:10,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:10,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:10,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997636886] [2021-07-13 20:25:10,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997636886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:10,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443866235] [2021-07-13 20:25:10,503 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:10,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:10,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:10,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:25:10,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:10,626 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 17 treesize of output 13 [2021-07-13 20:25:10,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:10,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:10,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:10,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-07-13 20:25:10,678 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 15 treesize of output 11 [2021-07-13 20:25:10,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:10,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:10,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:10,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:10,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443866235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:10,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:10,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-13 20:25:10,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123643754] [2021-07-13 20:25:10,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 20:25:10,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:10,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 20:25:10,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 20:25:10,728 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-07-13 20:25:10,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:10,981 INFO L93 Difference]: Finished difference Result 2791 states and 10482 transitions. [2021-07-13 20:25:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 20:25:10,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29 [2021-07-13 20:25:10,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:10,996 INFO L225 Difference]: With dead ends: 2791 [2021-07-13 20:25:10,996 INFO L226 Difference]: Without dead ends: 2712 [2021-07-13 20:25:10,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 20:25:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-07-13 20:25:11,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 1882. [2021-07-13 20:25:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:11,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2021-07-13 20:25:11,057 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2021-07-13 20:25:11,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:11,058 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2021-07-13 20:25:11,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-07-13 20:25:11,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2021-07-13 20:25:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 20:25:11,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:11,063 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:11,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 20:25:11,283 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2053161624, now seen corresponding path program 6 times [2021-07-13 20:25:11,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:11,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849314595] [2021-07-13 20:25:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:11,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:11,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849314595] [2021-07-13 20:25:11,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849314595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:11,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485962369] [2021-07-13 20:25:11,458 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:11,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:25:11,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 20:25:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:11,570 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 15 treesize of output 11 [2021-07-13 20:25:11,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:11,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:11,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:11,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-07-13 20:25:11,601 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 15 treesize of output 11 [2021-07-13 20:25:11,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:11,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:11,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:11,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:7 [2021-07-13 20:25:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:11,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485962369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:11,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:11,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-07-13 20:25:11,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899977334] [2021-07-13 20:25:11,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 20:25:11,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 20:25:11,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 20:25:11,684 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-07-13 20:25:12,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:12,008 INFO L93 Difference]: Finished difference Result 2687 states and 10043 transitions. [2021-07-13 20:25:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 20:25:12,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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 29 [2021-07-13 20:25:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:12,018 INFO L225 Difference]: With dead ends: 2687 [2021-07-13 20:25:12,019 INFO L226 Difference]: Without dead ends: 2608 [2021-07-13 20:25:12,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 20:25:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-07-13 20:25:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1926. [2021-07-13 20:25:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2021-07-13 20:25:12,079 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2021-07-13 20:25:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:12,079 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2021-07-13 20:25:12,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 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) [2021-07-13 20:25:12,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2021-07-13 20:25:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:25:12,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:12,084 INFO L508 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:12,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 20:25:12,301 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash 586599064, now seen corresponding path program 7 times [2021-07-13 20:25:12,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:12,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36179939] [2021-07-13 20:25:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:12,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36179939] [2021-07-13 20:25:12,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36179939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:12,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147135555] [2021-07-13 20:25:12,340 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:12,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 20:25:12,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:12,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147135555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:12,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:12,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-07-13 20:25:12,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394458367] [2021-07-13 20:25:12,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 20:25:12,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:12,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 20:25:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 20:25:12,440 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-07-13 20:25:12,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:12,554 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2021-07-13 20:25:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 20:25:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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 31 [2021-07-13 20:25:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:12,566 INFO L225 Difference]: With dead ends: 3472 [2021-07-13 20:25:12,566 INFO L226 Difference]: Without dead ends: 3318 [2021-07-13 20:25:12,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-07-13 20:25:12,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-07-13 20:25:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2021-07-13 20:25:12,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:12,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2021-07-13 20:25:12,695 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2021-07-13 20:25:12,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:12,695 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2021-07-13 20:25:12,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 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) [2021-07-13 20:25:12,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2021-07-13 20:25:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 20:25:12,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:12,703 INFO L508 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, 1, 1, 1, 1, 1] [2021-07-13 20:25:12,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 20:25:12,927 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash 413869912, now seen corresponding path program 8 times [2021-07-13 20:25:12,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:12,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141955321] [2021-07-13 20:25:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:12,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:12,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141955321] [2021-07-13 20:25:12,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141955321] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:12,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 20:25:12,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 20:25:12,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683125766] [2021-07-13 20:25:12,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:25:12,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:12,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:25:12,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:12,972 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:13,029 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2021-07-13 20:25:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 20:25:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:13,045 INFO L225 Difference]: With dead ends: 5761 [2021-07-13 20:25:13,045 INFO L226 Difference]: Without dead ends: 5510 [2021-07-13 20:25:13,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2021-07-13 20:25:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2021-07-13 20:25:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2021-07-13 20:25:13,194 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2021-07-13 20:25:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:13,194 INFO L482 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2021-07-13 20:25:13,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2021-07-13 20:25:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:13,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:13,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:13,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-13 20:25:13,209 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash -973577864, now seen corresponding path program 9 times [2021-07-13 20:25:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:13,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264763473] [2021-07-13 20:25:13,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:25:13,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:13,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264763473] [2021-07-13 20:25:13,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264763473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:13,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820166090] [2021-07-13 20:25:13,237 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:13,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:13,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:13,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:13,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 20:25:13,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820166090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:13,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:13,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:25:13,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173712797] [2021-07-13 20:25:13,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:25:13,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:13,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:25:13,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:25:13,390 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:13,745 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2021-07-13 20:25:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 20:25:13,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:13,789 INFO L225 Difference]: With dead ends: 17927 [2021-07-13 20:25:13,789 INFO L226 Difference]: Without dead ends: 15301 [2021-07-13 20:25:13,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-13 20:25:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2021-07-13 20:25:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2021-07-13 20:25:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2021-07-13 20:25:14,218 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2021-07-13 20:25:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:14,219 INFO L482 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2021-07-13 20:25:14,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2021-07-13 20:25:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:14,245 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:14,245 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:14,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 20:25:14,461 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash 726243605, now seen corresponding path program 10 times [2021-07-13 20:25:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:14,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446000809] [2021-07-13 20:25:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:14,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:14,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446000809] [2021-07-13 20:25:14,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446000809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:14,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834800239] [2021-07-13 20:25:14,566 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:14,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:14,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:14,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:14,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:14,721 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:14,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834800239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:14,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:14,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:25:14,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581471041] [2021-07-13 20:25:14,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:25:14,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:14,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:25:14,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:25:14,723 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-07-13 20:25:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:15,216 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2021-07-13 20:25:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 20:25:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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 34 [2021-07-13 20:25:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:15,294 INFO L225 Difference]: With dead ends: 21371 [2021-07-13 20:25:15,295 INFO L226 Difference]: Without dead ends: 20932 [2021-07-13 20:25:15,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-13 20:25:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2021-07-13 20:25:15,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2021-07-13 20:25:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2021-07-13 20:25:15,931 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2021-07-13 20:25:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:15,931 INFO L482 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2021-07-13 20:25:15,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 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) [2021-07-13 20:25:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2021-07-13 20:25:15,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:15,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:15,971 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:16,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:16,193 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash 493451422, now seen corresponding path program 11 times [2021-07-13 20:25:16,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:16,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518310951] [2021-07-13 20:25:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:16,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518310951] [2021-07-13 20:25:16,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518310951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:16,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045332668] [2021-07-13 20:25:16,222 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:16,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:25:16,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:16,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:16,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045332668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:16,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:16,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:16,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290662699] [2021-07-13 20:25:16,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:16,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:16,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:16,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:16,361 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-07-13 20:25:16,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:16,769 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2021-07-13 20:25:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:25:16,770 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2021-07-13 20:25:16,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:16,834 INFO L225 Difference]: With dead ends: 20596 [2021-07-13 20:25:16,834 INFO L226 Difference]: Without dead ends: 20518 [2021-07-13 20:25:16,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:25:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2021-07-13 20:25:17,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2021-07-13 20:25:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2021-07-13 20:25:17,442 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2021-07-13 20:25:17,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:17,442 INFO L482 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2021-07-13 20:25:17,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-07-13 20:25:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2021-07-13 20:25:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:17,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:17,485 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:17,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:17,701 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:17,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-07-13 20:25:17,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:17,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636863492] [2021-07-13 20:25:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:17,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:17,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636863492] [2021-07-13 20:25:17,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636863492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:17,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850567781] [2021-07-13 20:25:17,742 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:17,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:25:17,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:17,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850567781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:17,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:17,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:17,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220513737] [2021-07-13 20:25:17,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:17,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:17,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:17,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:17,891 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-07-13 20:25:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:18,378 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2021-07-13 20:25:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:25:18,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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 34 [2021-07-13 20:25:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:18,545 INFO L225 Difference]: With dead ends: 22733 [2021-07-13 20:25:18,545 INFO L226 Difference]: Without dead ends: 21028 [2021-07-13 20:25:18,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:25:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2021-07-13 20:25:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2021-07-13 20:25:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2021-07-13 20:25:19,079 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2021-07-13 20:25:19,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:19,079 INFO L482 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2021-07-13 20:25:19,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2021-07-13 20:25:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2021-07-13 20:25:19,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:19,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:19,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:19,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 20:25:19,322 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:19,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:19,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1422790198, now seen corresponding path program 13 times [2021-07-13 20:25:19,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:19,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042915558] [2021-07-13 20:25:19,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:19,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:19,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042915558] [2021-07-13 20:25:19,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042915558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:19,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764095448] [2021-07-13 20:25:19,375 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:19,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764095448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:19,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:19,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 20:25:19,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87727171] [2021-07-13 20:25:19,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 20:25:19,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:19,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 20:25:19,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 20:25:19,518 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-07-13 20:25:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:20,158 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2021-07-13 20:25:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 20:25:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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 34 [2021-07-13 20:25:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:20,275 INFO L225 Difference]: With dead ends: 31402 [2021-07-13 20:25:20,276 INFO L226 Difference]: Without dead ends: 31094 [2021-07-13 20:25:20,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-13 20:25:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2021-07-13 20:25:20,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2021-07-13 20:25:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2021-07-13 20:25:20,995 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2021-07-13 20:25:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:20,995 INFO L482 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2021-07-13 20:25:20,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 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) [2021-07-13 20:25:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2021-07-13 20:25:21,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:21,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:21,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:21,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:21,398 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash 959184970, now seen corresponding path program 14 times [2021-07-13 20:25:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:21,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5952767] [2021-07-13 20:25:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:21,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:21,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5952767] [2021-07-13 20:25:21,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5952767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:21,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752913504] [2021-07-13 20:25:21,425 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:21,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:21,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:21,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:21,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:21,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752913504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:21,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:21,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:21,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753474231] [2021-07-13 20:25:21,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:21,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:21,544 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:22,079 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2021-07-13 20:25:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 20:25:22,079 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 20:25:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:22,204 INFO L225 Difference]: With dead ends: 33709 [2021-07-13 20:25:22,204 INFO L226 Difference]: Without dead ends: 32656 [2021-07-13 20:25:22,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 20:25:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2021-07-13 20:25:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2021-07-13 20:25:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2021-07-13 20:25:23,088 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2021-07-13 20:25:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:23,089 INFO L482 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2021-07-13 20:25:23,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2021-07-13 20:25:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 20:25:23,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:23,165 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:23,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 20:25:23,381 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1446275945, now seen corresponding path program 15 times [2021-07-13 20:25:23,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:23,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458953016] [2021-07-13 20:25:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:25:23,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:23,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458953016] [2021-07-13 20:25:23,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458953016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:23,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204963414] [2021-07-13 20:25:23,408 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:23,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:25:23,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:23,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 20:25:23,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 20:25:23,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204963414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:23,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:23,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 20:25:23,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667403299] [2021-07-13 20:25:23,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 20:25:23,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 20:25:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 20:25:23,537 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-07-13 20:25:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:24,112 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2021-07-13 20:25:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 20:25:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 34 [2021-07-13 20:25:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:24,434 INFO L225 Difference]: With dead ends: 31214 [2021-07-13 20:25:24,434 INFO L226 Difference]: Without dead ends: 31106 [2021-07-13 20:25:24,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 20:25:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2021-07-13 20:25:25,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2021-07-13 20:25:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2021-07-13 20:25:25,324 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2021-07-13 20:25:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:25,324 INFO L482 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2021-07-13 20:25:25,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-07-13 20:25:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2021-07-13 20:25:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:25:25,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:25,386 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:25,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:25,586 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:25,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:25,587 INFO L82 PathProgramCache]: Analyzing trace with hash 351777995, now seen corresponding path program 16 times [2021-07-13 20:25:25,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:25,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943456825] [2021-07-13 20:25:25,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:25,624 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 20:25:25,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:25,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943456825] [2021-07-13 20:25:25,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943456825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:25,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100167698] [2021-07-13 20:25:25,625 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:25,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:25,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:25:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 20:25:25,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100167698] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:25,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:25:25,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-07-13 20:25:25,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922297496] [2021-07-13 20:25:25,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 20:25:25,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:25,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 20:25:25,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:25,737 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:25,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:25,977 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2021-07-13 20:25:25,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 20:25:25,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-07-13 20:25:25,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:26,314 INFO L225 Difference]: With dead ends: 29524 [2021-07-13 20:25:26,314 INFO L226 Difference]: Without dead ends: 29524 [2021-07-13 20:25:26,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 20:25:26,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2021-07-13 20:25:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2021-07-13 20:25:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2021-07-13 20:25:26,957 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2021-07-13 20:25:26,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:26,957 INFO L482 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2021-07-13 20:25:26,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2021-07-13 20:25:27,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:25:27,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:27,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:27,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 20:25:27,211 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:27,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2034805493, now seen corresponding path program 17 times [2021-07-13 20:25:27,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:27,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411784776] [2021-07-13 20:25:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 20:25:27,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:27,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411784776] [2021-07-13 20:25:27,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411784776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:27,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077999715] [2021-07-13 20:25:27,262 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:27,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:25:27,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:25:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-13 20:25:27,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077999715] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 20:25:27,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 20:25:27,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-07-13 20:25:27,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569327149] [2021-07-13 20:25:27,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 20:25:27,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:27,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 20:25:27,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:27,361 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:27,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:27,763 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2021-07-13 20:25:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 20:25:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 37 [2021-07-13 20:25:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:27,881 INFO L225 Difference]: With dead ends: 30000 [2021-07-13 20:25:27,881 INFO L226 Difference]: Without dead ends: 30000 [2021-07-13 20:25:27,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2021-07-13 20:25:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2021-07-13 20:25:28,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2021-07-13 20:25:28,892 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2021-07-13 20:25:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:28,892 INFO L482 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2021-07-13 20:25:28,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2021-07-13 20:25:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-07-13 20:25:28,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:28,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:29,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 20:25:29,158 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1631458869, now seen corresponding path program 18 times [2021-07-13 20:25:29,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:29,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883793566] [2021-07-13 20:25:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:25:29,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:29,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883793566] [2021-07-13 20:25:29,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883793566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:29,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701903395] [2021-07-13 20:25:29,180 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:29,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:25:29,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 20:25:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 20:25:29,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701903395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:29,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:29,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 20:25:29,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381496162] [2021-07-13 20:25:29,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 20:25:29,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 20:25:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:29,260 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:29,486 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2021-07-13 20:25:29,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 20:25:29,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 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 37 [2021-07-13 20:25:29,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:29,892 INFO L225 Difference]: With dead ends: 37294 [2021-07-13 20:25:29,892 INFO L226 Difference]: Without dead ends: 37294 [2021-07-13 20:25:29,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 20:25:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2021-07-13 20:25:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2021-07-13 20:25:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2021-07-13 20:25:31,074 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2021-07-13 20:25:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:31,074 INFO L482 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2021-07-13 20:25:31,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:31,074 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2021-07-13 20:25:31,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:31,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:31,216 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:31,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 20:25:31,416 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:31,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1763377011, now seen corresponding path program 19 times [2021-07-13 20:25:31,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:31,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733117670] [2021-07-13 20:25:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:31,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733117670] [2021-07-13 20:25:31,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733117670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:31,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223644816] [2021-07-13 20:25:31,896 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:31,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:25:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:32,173 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:25:32,174 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 28 treesize of output 16 [2021-07-13 20:25:32,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:32,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:32,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:32,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:25:32,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:25:32,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:32,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:32,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:32,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:25:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:32,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223644816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:32,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:32,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:25:32,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164124991] [2021-07-13 20:25:32,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:25:32,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:32,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:25:32,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:25:32,353 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:34,501 INFO L93 Difference]: Finished difference Result 61929 states and 253070 transitions. [2021-07-13 20:25:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:25:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:34,793 INFO L225 Difference]: With dead ends: 61929 [2021-07-13 20:25:34,793 INFO L226 Difference]: Without dead ends: 61737 [2021-07-13 20:25:34,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1210.5ms TimeCoverageRelationStatistics Valid=305, Invalid=1417, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:25:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61737 states. [2021-07-13 20:25:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61737 to 34859. [2021-07-13 20:25:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34859 states, 34858 states have (on average 4.136668770440071) internal successors, (144196), 34858 states have internal predecessors, (144196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34859 states to 34859 states and 144196 transitions. [2021-07-13 20:25:36,547 INFO L78 Accepts]: Start accepts. Automaton has 34859 states and 144196 transitions. Word has length 39 [2021-07-13 20:25:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:36,548 INFO L482 AbstractCegarLoop]: Abstraction has 34859 states and 144196 transitions. [2021-07-13 20:25:36,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 34859 states and 144196 transitions. [2021-07-13 20:25:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:36,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:36,659 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:36,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 20:25:36,860 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:36,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1529459447, now seen corresponding path program 20 times [2021-07-13 20:25:36,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:36,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67726108] [2021-07-13 20:25:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:37,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67726108] [2021-07-13 20:25:37,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67726108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:37,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091778312] [2021-07-13 20:25:37,279 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:37,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:25:37,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:37,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:25:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:37,526 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:25:37,526 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 28 treesize of output 16 [2021-07-13 20:25:37,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:37,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:37,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:37,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:25:37,651 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 35 treesize of output 27 [2021-07-13 20:25:37,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:37,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:37,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:37,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:25:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:37,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091778312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:37,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:37,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:25:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476794695] [2021-07-13 20:25:37,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:25:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:25:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:25:37,712 INFO L87 Difference]: Start difference. First operand 34859 states and 144196 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:39,907 INFO L93 Difference]: Finished difference Result 62927 states and 257215 transitions. [2021-07-13 20:25:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:25:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:40,208 INFO L225 Difference]: With dead ends: 62927 [2021-07-13 20:25:40,208 INFO L226 Difference]: Without dead ends: 62711 [2021-07-13 20:25:40,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1442.8ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:25:40,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62711 states. [2021-07-13 20:25:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62711 to 35009. [2021-07-13 20:25:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35009 states, 35008 states have (on average 4.135283363802559) internal successors, (144768), 35008 states have internal predecessors, (144768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35009 states to 35009 states and 144768 transitions. [2021-07-13 20:25:41,953 INFO L78 Accepts]: Start accepts. Automaton has 35009 states and 144768 transitions. Word has length 39 [2021-07-13 20:25:41,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:41,954 INFO L482 AbstractCegarLoop]: Abstraction has 35009 states and 144768 transitions. [2021-07-13 20:25:41,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 35009 states and 144768 transitions. [2021-07-13 20:25:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:42,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:42,092 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:42,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 20:25:42,292 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash -953652233, now seen corresponding path program 21 times [2021-07-13 20:25:42,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:42,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549046962] [2021-07-13 20:25:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:42,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:42,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549046962] [2021-07-13 20:25:42,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549046962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:42,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862865663] [2021-07-13 20:25:42,708 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 [2021-07-13 20:25:42,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:25:42,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:25:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:42,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:42,968 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 30 treesize of output 36 [2021-07-13 20:25:42,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:42,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:43,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:43,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:91 [2021-07-13 20:25:43,150 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 32 treesize of output 24 [2021-07-13 20:25:43,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:43,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:43,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:43,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-07-13 20:25:43,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:43,224 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 16 [2021-07-13 20:25:43,226 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:43,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:43,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:43,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:25:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:43,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862865663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:43,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:43,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:25:43,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250635166] [2021-07-13 20:25:43,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:25:43,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:25:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:25:43,311 INFO L87 Difference]: Start difference. First operand 35009 states and 144768 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:46,179 INFO L93 Difference]: Finished difference Result 64186 states and 261937 transitions. [2021-07-13 20:25:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:25:46,179 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:46,687 INFO L225 Difference]: With dead ends: 64186 [2021-07-13 20:25:46,687 INFO L226 Difference]: Without dead ends: 64076 [2021-07-13 20:25:46,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1831.5ms TimeCoverageRelationStatistics Valid=717, Invalid=3065, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:25:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64076 states. [2021-07-13 20:25:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64076 to 35529. [2021-07-13 20:25:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35529 states, 35528 states have (on average 4.1301790137356456) internal successors, (146737), 35528 states have internal predecessors, (146737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:48,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35529 states to 35529 states and 146737 transitions. [2021-07-13 20:25:48,297 INFO L78 Accepts]: Start accepts. Automaton has 35529 states and 146737 transitions. Word has length 39 [2021-07-13 20:25:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:48,297 INFO L482 AbstractCegarLoop]: Abstraction has 35529 states and 146737 transitions. [2021-07-13 20:25:48,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 35529 states and 146737 transitions. [2021-07-13 20:25:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:48,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:48,387 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:48,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:48,588 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2033805687, now seen corresponding path program 22 times [2021-07-13 20:25:48,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:48,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656780796] [2021-07-13 20:25:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:48,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:48,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656780796] [2021-07-13 20:25:48,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656780796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:48,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973343492] [2021-07-13 20:25:48,946 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:48,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:25:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:25:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:49,172 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:25:49,173 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 28 treesize of output 16 [2021-07-13 20:25:49,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:49,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:49,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:49,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:25:49,251 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 30 treesize of output 22 [2021-07-13 20:25:49,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:49,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:49,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:49,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:25:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:49,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973343492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:49,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:49,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:25:49,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563801933] [2021-07-13 20:25:49,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:25:49,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:49,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:25:49,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:25:49,323 INFO L87 Difference]: Start difference. First operand 35529 states and 146737 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:51,425 INFO L93 Difference]: Finished difference Result 81268 states and 331701 transitions. [2021-07-13 20:25:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:25:51,426 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:52,050 INFO L225 Difference]: With dead ends: 81268 [2021-07-13 20:25:52,050 INFO L226 Difference]: Without dead ends: 81213 [2021-07-13 20:25:52,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1015.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1642, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:25:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81213 states. [2021-07-13 20:25:53,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81213 to 35699. [2021-07-13 20:25:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35699 states, 35698 states have (on average 4.142865146506807) internal successors, (147892), 35698 states have internal predecessors, (147892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35699 states to 35699 states and 147892 transitions. [2021-07-13 20:25:53,790 INFO L78 Accepts]: Start accepts. Automaton has 35699 states and 147892 transitions. Word has length 39 [2021-07-13 20:25:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:25:53,791 INFO L482 AbstractCegarLoop]: Abstraction has 35699 states and 147892 transitions. [2021-07-13 20:25:53,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 35699 states and 147892 transitions. [2021-07-13 20:25:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:25:53,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:25:53,883 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:25:54,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 20:25:54,085 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:25:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:25:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1355985241, now seen corresponding path program 23 times [2021-07-13 20:25:54,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:25:54,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030114815] [2021-07-13 20:25:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:25:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:25:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:54,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:25:54,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030114815] [2021-07-13 20:25:54,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030114815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:54,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194398130] [2021-07-13 20:25:54,505 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:25:54,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:25:54,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:25:54,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:25:54,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:25:54,913 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-07-13 20:25:55,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:55,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:55,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:55,080 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 35 treesize of output 53 [2021-07-13 20:25:55,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:55,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:55,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:25:55,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:50 [2021-07-13 20:25:55,256 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 35 treesize of output 27 [2021-07-13 20:25:55,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:25:55,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:55,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:25:55,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:25:55,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:55,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:25:55,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:55,383 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 20 treesize of output 39 [2021-07-13 20:25:55,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:25:55,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:25:55,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:25:55,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:25:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:25:55,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194398130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:25:55,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:25:55,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:25:55,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372017844] [2021-07-13 20:25:55,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:25:55,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:25:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:25:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:25:55,478 INFO L87 Difference]: Start difference. First operand 35699 states and 147892 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:25:56,657 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-07-13 20:25:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:25:59,400 INFO L93 Difference]: Finished difference Result 67639 states and 276324 transitions. [2021-07-13 20:25:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 20:25:59,400 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:25:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:25:59,931 INFO L225 Difference]: With dead ends: 67639 [2021-07-13 20:25:59,931 INFO L226 Difference]: Without dead ends: 67418 [2021-07-13 20:25:59,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1134 ImplicationChecksByTransitivity, 3090.9ms TimeCoverageRelationStatistics Valid=710, Invalid=3982, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:26:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67418 states. [2021-07-13 20:26:01,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67418 to 36148. [2021-07-13 20:26:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36148 states, 36147 states have (on average 4.136857830525355) internal successors, (149535), 36147 states have internal predecessors, (149535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36148 states to 36148 states and 149535 transitions. [2021-07-13 20:26:01,591 INFO L78 Accepts]: Start accepts. Automaton has 36148 states and 149535 transitions. Word has length 39 [2021-07-13 20:26:01,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:01,591 INFO L482 AbstractCegarLoop]: Abstraction has 36148 states and 149535 transitions. [2021-07-13 20:26:01,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:01,591 INFO L276 IsEmpty]: Start isEmpty. Operand 36148 states and 149535 transitions. [2021-07-13 20:26:01,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:01,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:01,692 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:01,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:01,897 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash -768675797, now seen corresponding path program 24 times [2021-07-13 20:26:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202142703] [2021-07-13 20:26:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:02,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:02,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202142703] [2021-07-13 20:26:02,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202142703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:02,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566315623] [2021-07-13 20:26:02,343 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:02,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:26:02,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:02,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:26:02,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:02,595 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:02,595 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 33 treesize of output 21 [2021-07-13 20:26:02,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:02,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:26:02,688 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 35 treesize of output 27 [2021-07-13 20:26:02,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:02,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:02,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:02,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566315623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:02,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:02,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:02,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150963056] [2021-07-13 20:26:02,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:02,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:02,751 INFO L87 Difference]: Start difference. First operand 36148 states and 149535 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:03,177 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 24 [2021-07-13 20:26:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:04,829 INFO L93 Difference]: Finished difference Result 77150 states and 313355 transitions. [2021-07-13 20:26:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:05,184 INFO L225 Difference]: With dead ends: 77150 [2021-07-13 20:26:05,184 INFO L226 Difference]: Without dead ends: 76966 [2021-07-13 20:26:05,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1493.9ms TimeCoverageRelationStatistics Valid=385, Invalid=1777, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:26:05,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76966 states. [2021-07-13 20:26:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76966 to 35834. [2021-07-13 20:26:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35834 states, 35833 states have (on average 4.141601317221555) internal successors, (148406), 35833 states have internal predecessors, (148406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:07,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35834 states to 35834 states and 148406 transitions. [2021-07-13 20:26:07,086 INFO L78 Accepts]: Start accepts. Automaton has 35834 states and 148406 transitions. Word has length 39 [2021-07-13 20:26:07,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:07,086 INFO L482 AbstractCegarLoop]: Abstraction has 35834 states and 148406 transitions. [2021-07-13 20:26:07,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:07,086 INFO L276 IsEmpty]: Start isEmpty. Operand 35834 states and 148406 transitions. [2021-07-13 20:26:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:07,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:07,186 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:07,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 20:26:07,388 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash -789200017, now seen corresponding path program 25 times [2021-07-13 20:26:07,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:07,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518069723] [2021-07-13 20:26:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:07,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:07,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518069723] [2021-07-13 20:26:07,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518069723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:07,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920094057] [2021-07-13 20:26:07,809 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:07,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:07,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:08,097 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:08,097 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 33 treesize of output 21 [2021-07-13 20:26:08,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:08,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:08,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:08,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:26:08,142 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 35 treesize of output 27 [2021-07-13 20:26:08,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:08,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:08,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:08,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:08,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920094057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:08,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:08,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:08,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24319410] [2021-07-13 20:26:08,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:08,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:08,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:08,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:08,191 INFO L87 Difference]: Start difference. First operand 35834 states and 148406 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:10,111 INFO L93 Difference]: Finished difference Result 64096 states and 261990 transitions. [2021-07-13 20:26:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:10,112 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:10,391 INFO L225 Difference]: With dead ends: 64096 [2021-07-13 20:26:10,391 INFO L226 Difference]: Without dead ends: 63848 [2021-07-13 20:26:10,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1204.6ms TimeCoverageRelationStatistics Valid=352, Invalid=1454, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:26:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63848 states. [2021-07-13 20:26:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63848 to 36020. [2021-07-13 20:26:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36020 states, 36019 states have (on average 4.13964851883728) internal successors, (149106), 36019 states have internal predecessors, (149106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:11,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36020 states to 36020 states and 149106 transitions. [2021-07-13 20:26:11,851 INFO L78 Accepts]: Start accepts. Automaton has 36020 states and 149106 transitions. Word has length 39 [2021-07-13 20:26:11,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:11,851 INFO L482 AbstractCegarLoop]: Abstraction has 36020 states and 149106 transitions. [2021-07-13 20:26:11,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:11,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36020 states and 149106 transitions. [2021-07-13 20:26:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:11,948 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:11,948 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:12,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:12,148 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:12,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:12,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900731, now seen corresponding path program 26 times [2021-07-13 20:26:12,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:12,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360050916] [2021-07-13 20:26:12,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:12,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:12,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360050916] [2021-07-13 20:26:12,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360050916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:12,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339162238] [2021-07-13 20:26:12,518 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:12,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:12,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:12,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:13,052 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 37 treesize of output 29 [2021-07-13 20:26:13,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:26:13,092 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:13,092 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 39 treesize of output 27 [2021-07-13 20:26:13,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:13,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:13,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:26:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:13,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339162238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:13,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:13,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:13,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71940863] [2021-07-13 20:26:13,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:13,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:13,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:13,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:13,143 INFO L87 Difference]: Start difference. First operand 36020 states and 149106 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:15,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:15,561 INFO L93 Difference]: Finished difference Result 81375 states and 330962 transitions. [2021-07-13 20:26:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:15,561 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:16,013 INFO L225 Difference]: With dead ends: 81375 [2021-07-13 20:26:16,013 INFO L226 Difference]: Without dead ends: 81223 [2021-07-13 20:26:16,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1555.0ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:26:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81223 states. [2021-07-13 20:26:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81223 to 36090. [2021-07-13 20:26:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36090 states, 36089 states have (on average 4.140486020671118) internal successors, (149426), 36089 states have internal predecessors, (149426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36090 states to 36090 states and 149426 transitions. [2021-07-13 20:26:17,921 INFO L78 Accepts]: Start accepts. Automaton has 36090 states and 149426 transitions. Word has length 39 [2021-07-13 20:26:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:17,922 INFO L482 AbstractCegarLoop]: Abstraction has 36090 states and 149426 transitions. [2021-07-13 20:26:17,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:17,922 INFO L276 IsEmpty]: Start isEmpty. Operand 36090 states and 149426 transitions. [2021-07-13 20:26:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:18,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:18,055 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:18,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 20:26:18,271 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash -908979985, now seen corresponding path program 27 times [2021-07-13 20:26:18,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:18,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489355321] [2021-07-13 20:26:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:18,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:18,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489355321] [2021-07-13 20:26:18,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489355321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:19,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896674769] [2021-07-13 20:26:19,005 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:19,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:26:19,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:19,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:26:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:19,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,395 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 41 treesize of output 49 [2021-07-13 20:26:19,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:19,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:19,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:74 [2021-07-13 20:26:19,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:19,473 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 32 treesize of output 20 [2021-07-13 20:26:19,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:19,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:19,480 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 58 treesize of output 38 [2021-07-13 20:26:19,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:19,487 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 45 treesize of output 29 [2021-07-13 20:26:19,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:19,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2021-07-13 20:26:19,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:19,560 INFO L628 ElimStorePlain]: treesize reduction 30, result has 68.4 percent of original size [2021-07-13 20:26:19,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:26:19,568 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:233, output treesize:65 [2021-07-13 20:26:19,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,663 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 16 [2021-07-13 20:26:19,665 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:19,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,713 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 16 [2021-07-13 20:26:19,714 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:19,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:19,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:26:19,758 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:88, output treesize:95 [2021-07-13 20:26:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:20,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896674769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:20,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:20,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:26:20,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122529159] [2021-07-13 20:26:20,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:26:20,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:20,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:26:20,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:26:20,008 INFO L87 Difference]: Start difference. First operand 36090 states and 149426 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:23,623 INFO L93 Difference]: Finished difference Result 64235 states and 260613 transitions. [2021-07-13 20:26:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:26:23,623 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:23,961 INFO L225 Difference]: With dead ends: 64235 [2021-07-13 20:26:23,961 INFO L226 Difference]: Without dead ends: 64063 [2021-07-13 20:26:23,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 3122.0ms TimeCoverageRelationStatistics Valid=889, Invalid=3271, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 20:26:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64063 states. [2021-07-13 20:26:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64063 to 36112. [2021-07-13 20:26:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36112 states, 36111 states have (on average 4.140289662429731) internal successors, (149510), 36111 states have internal predecessors, (149510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36112 states to 36112 states and 149510 transitions. [2021-07-13 20:26:25,578 INFO L78 Accepts]: Start accepts. Automaton has 36112 states and 149510 transitions. Word has length 39 [2021-07-13 20:26:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:25,578 INFO L482 AbstractCegarLoop]: Abstraction has 36112 states and 149510 transitions. [2021-07-13 20:26:25,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 36112 states and 149510 transitions. [2021-07-13 20:26:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:25,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:25,678 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:25,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:25,879 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:25,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1386806843, now seen corresponding path program 28 times [2021-07-13 20:26:25,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:25,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951622120] [2021-07-13 20:26:25,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:26,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:26,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951622120] [2021-07-13 20:26:26,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951622120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:26,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85579060] [2021-07-13 20:26:26,272 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:26,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:26:26,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:26,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:26,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:26,554 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 37 treesize of output 29 [2021-07-13 20:26:26,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:26,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:26,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:26,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:26:26,595 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:26,595 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 39 treesize of output 27 [2021-07-13 20:26:26,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:26,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:26,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:26,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:26:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85579060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:26,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:26,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:26,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831327116] [2021-07-13 20:26:26,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:26,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:26,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:26,646 INFO L87 Difference]: Start difference. First operand 36112 states and 149510 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:27,189 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-07-13 20:26:28,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:28,912 INFO L93 Difference]: Finished difference Result 81804 states and 333218 transitions. [2021-07-13 20:26:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:26:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:29,280 INFO L225 Difference]: With dead ends: 81804 [2021-07-13 20:26:29,280 INFO L226 Difference]: Without dead ends: 81722 [2021-07-13 20:26:29,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1482.9ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:26:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81722 states. [2021-07-13 20:26:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81722 to 36088. [2021-07-13 20:26:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36088 states, 36087 states have (on average 4.143431152492587) internal successors, (149524), 36087 states have internal predecessors, (149524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36088 states to 36088 states and 149524 transitions. [2021-07-13 20:26:31,223 INFO L78 Accepts]: Start accepts. Automaton has 36088 states and 149524 transitions. Word has length 39 [2021-07-13 20:26:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:31,223 INFO L482 AbstractCegarLoop]: Abstraction has 36088 states and 149524 transitions. [2021-07-13 20:26:31,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 36088 states and 149524 transitions. [2021-07-13 20:26:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:31,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:31,326 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:31,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 20:26:31,527 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:31,527 INFO L82 PathProgramCache]: Analyzing trace with hash -835335761, now seen corresponding path program 29 times [2021-07-13 20:26:31,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:31,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420162378] [2021-07-13 20:26:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:31,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420162378] [2021-07-13 20:26:31,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420162378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:31,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707950250] [2021-07-13 20:26:31,902 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:31,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:26:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:31,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:31,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:32,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:32,188 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 26 treesize of output 44 [2021-07-13 20:26:32,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:32,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:32,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:32,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:42 [2021-07-13 20:26:32,315 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 37 treesize of output 29 [2021-07-13 20:26:32,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:32,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:32,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:32,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:22 [2021-07-13 20:26:32,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:32,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:32,370 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 22 treesize of output 41 [2021-07-13 20:26:32,374 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:32,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:32,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:32,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-13 20:26:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:32,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707950250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:32,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:32,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:26:32,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372812279] [2021-07-13 20:26:32,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:26:32,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:26:32,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:26:32,476 INFO L87 Difference]: Start difference. First operand 36088 states and 149524 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:36,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:36,989 INFO L93 Difference]: Finished difference Result 69670 states and 283586 transitions. [2021-07-13 20:26:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-13 20:26:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:37,307 INFO L225 Difference]: With dead ends: 69670 [2021-07-13 20:26:37,307 INFO L226 Difference]: Without dead ends: 69241 [2021-07-13 20:26:37,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 3067.3ms TimeCoverageRelationStatistics Valid=919, Invalid=5723, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:26:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69241 states. [2021-07-13 20:26:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69241 to 36951. [2021-07-13 20:26:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36951 states, 36950 states have (on average 4.1375372124492555) internal successors, (152882), 36950 states have internal predecessors, (152882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36951 states to 36951 states and 152882 transitions. [2021-07-13 20:26:38,777 INFO L78 Accepts]: Start accepts. Automaton has 36951 states and 152882 transitions. Word has length 39 [2021-07-13 20:26:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:38,778 INFO L482 AbstractCegarLoop]: Abstraction has 36951 states and 152882 transitions. [2021-07-13 20:26:38,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 36951 states and 152882 transitions. [2021-07-13 20:26:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:38,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:38,871 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:39,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:39,077 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:39,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:39,077 INFO L82 PathProgramCache]: Analyzing trace with hash 976519855, now seen corresponding path program 30 times [2021-07-13 20:26:39,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:39,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109416251] [2021-07-13 20:26:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:39,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:39,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109416251] [2021-07-13 20:26:39,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109416251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:39,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365603212] [2021-07-13 20:26:39,675 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:39,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:26:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:26:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:39,893 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:39,894 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 28 treesize of output 16 [2021-07-13 20:26:39,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-13 20:26:39,931 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 30 treesize of output 22 [2021-07-13 20:26:39,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:39,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:26:39,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:39,985 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 16 [2021-07-13 20:26:39,986 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:39,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:40,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:40,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:26:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:40,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365603212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:40,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:40,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:26:40,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417405632] [2021-07-13 20:26:40,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:26:40,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:26:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:26:40,072 INFO L87 Difference]: Start difference. First operand 36951 states and 152882 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:41,058 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-07-13 20:26:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:42,594 INFO L93 Difference]: Finished difference Result 69773 states and 285641 transitions. [2021-07-13 20:26:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 20:26:42,595 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:42,921 INFO L225 Difference]: With dead ends: 69773 [2021-07-13 20:26:42,921 INFO L226 Difference]: Without dead ends: 69718 [2021-07-13 20:26:42,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1429.4ms TimeCoverageRelationStatistics Valid=414, Invalid=2136, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 20:26:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69718 states. [2021-07-13 20:26:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69718 to 37115. [2021-07-13 20:26:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37115 states, 37114 states have (on average 4.138114997036159) internal successors, (153582), 37114 states have internal predecessors, (153582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37115 states to 37115 states and 153582 transitions. [2021-07-13 20:26:44,479 INFO L78 Accepts]: Start accepts. Automaton has 37115 states and 153582 transitions. Word has length 39 [2021-07-13 20:26:44,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:44,479 INFO L482 AbstractCegarLoop]: Abstraction has 37115 states and 153582 transitions. [2021-07-13 20:26:44,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:44,479 INFO L276 IsEmpty]: Start isEmpty. Operand 37115 states and 153582 transitions. [2021-07-13 20:26:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:44,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:44,581 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:44,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:44,782 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash 747788741, now seen corresponding path program 31 times [2021-07-13 20:26:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:44,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593228097] [2021-07-13 20:26:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:45,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:45,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593228097] [2021-07-13 20:26:45,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593228097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:45,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117960176] [2021-07-13 20:26:45,440 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:45,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:45,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:45,810 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:45,811 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 28 treesize of output 16 [2021-07-13 20:26:45,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-13 20:26:45,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:26:45,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:45,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:45,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:45,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117960176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:45,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:45,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:45,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666371318] [2021-07-13 20:26:45,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:45,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:45,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:45,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:45,961 INFO L87 Difference]: Start difference. First operand 37115 states and 153582 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:48,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:48,332 INFO L93 Difference]: Finished difference Result 79233 states and 321882 transitions. [2021-07-13 20:26:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:26:48,333 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:48,709 INFO L225 Difference]: With dead ends: 79233 [2021-07-13 20:26:48,710 INFO L226 Difference]: Without dead ends: 79017 [2021-07-13 20:26:48,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1643.1ms TimeCoverageRelationStatistics Valid=437, Invalid=2215, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:26:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79017 states. [2021-07-13 20:26:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79017 to 36721. [2021-07-13 20:26:50,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 36720 states have (on average 4.142184095860566) internal successors, (152101), 36720 states have internal predecessors, (152101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:50,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 152101 transitions. [2021-07-13 20:26:50,353 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 152101 transitions. Word has length 39 [2021-07-13 20:26:50,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:50,353 INFO L482 AbstractCegarLoop]: Abstraction has 36721 states and 152101 transitions. [2021-07-13 20:26:50,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 152101 transitions. [2021-07-13 20:26:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:50,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:50,453 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:50,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 20:26:50,653 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:50,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:50,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1618032043, now seen corresponding path program 32 times [2021-07-13 20:26:50,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:50,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20675263] [2021-07-13 20:26:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:51,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20675263] [2021-07-13 20:26:51,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20675263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138284524] [2021-07-13 20:26:51,096 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:51,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:26:51,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:51,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:26:51,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:51,348 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-07-13 20:26:51,599 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:26:51,599 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 33 treesize of output 21 [2021-07-13 20:26:51,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:51,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:51,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:51,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:26:51,643 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 35 treesize of output 27 [2021-07-13 20:26:51,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:51,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:51,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:26:51,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:26:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:51,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138284524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:51,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:51,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:26:51,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126908074] [2021-07-13 20:26:51,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:26:51,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:51,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:26:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:26:51,690 INFO L87 Difference]: Start difference. First operand 36721 states and 152101 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:26:53,519 INFO L93 Difference]: Finished difference Result 65192 states and 266420 transitions. [2021-07-13 20:26:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:26:53,519 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:26:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:26:53,990 INFO L225 Difference]: With dead ends: 65192 [2021-07-13 20:26:53,990 INFO L226 Difference]: Without dead ends: 64944 [2021-07-13 20:26:53,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1138.7ms TimeCoverageRelationStatistics Valid=335, Invalid=1471, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:26:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64944 states. [2021-07-13 20:26:55,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64944 to 36907. [2021-07-13 20:26:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36907 states, 36906 states have (on average 4.140275293990137) internal successors, (152801), 36906 states have internal predecessors, (152801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36907 states to 36907 states and 152801 transitions. [2021-07-13 20:26:55,288 INFO L78 Accepts]: Start accepts. Automaton has 36907 states and 152801 transitions. Word has length 39 [2021-07-13 20:26:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:26:55,289 INFO L482 AbstractCegarLoop]: Abstraction has 36907 states and 152801 transitions. [2021-07-13 20:26:55,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:26:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 36907 states and 152801 transitions. [2021-07-13 20:26:55,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:26:55,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:26:55,640 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:26:55,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:55,862 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:26:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:26:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash 980871553, now seen corresponding path program 33 times [2021-07-13 20:26:55,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:26:55,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597119332] [2021-07-13 20:26:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:26:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:26:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:56,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:26:56,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597119332] [2021-07-13 20:26:56,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597119332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:56,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237785664] [2021-07-13 20:26:56,274 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:26:56,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:26:56,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:26:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:26:56,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:26:56,716 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:56,716 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 39 treesize of output 47 [2021-07-13 20:26:56,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:56,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:56,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:26:56,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:64 [2021-07-13 20:26:56,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:56,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:56,870 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 39 treesize of output 45 [2021-07-13 20:26:56,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:56,885 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:26:56,885 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 26 treesize of output 22 [2021-07-13 20:26:56,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:26:56,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:56,907 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 39 treesize of output 45 [2021-07-13 20:26:56,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:56,924 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:26:56,925 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 26 treesize of output 22 [2021-07-13 20:26:56,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:26:56,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:57,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2021-07-13 20:26:57,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:233, output treesize:216 [2021-07-13 20:26:57,292 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:57,293 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 16 [2021-07-13 20:26:57,295 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:57,579 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-07-13 20:26:57,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:26:57,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:26:57,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-13 20:26:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:26:57,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237785664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:26:57,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:26:57,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:26:57,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030733211] [2021-07-13 20:26:57,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:26:57,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:26:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:26:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:26:57,685 INFO L87 Difference]: Start difference. First operand 36907 states and 152801 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:00,296 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 71 [2021-07-13 20:27:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:02,975 INFO L93 Difference]: Finished difference Result 77297 states and 311441 transitions. [2021-07-13 20:27:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:27:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:03,311 INFO L225 Difference]: With dead ends: 77297 [2021-07-13 20:27:03,312 INFO L226 Difference]: Without dead ends: 76962 [2021-07-13 20:27:03,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 4412.3ms TimeCoverageRelationStatistics Valid=1240, Invalid=6242, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:27:03,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76962 states. [2021-07-13 20:27:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76962 to 37046. [2021-07-13 20:27:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37046 states, 37045 states have (on average 4.137454447293832) internal successors, (153272), 37045 states have internal predecessors, (153272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37046 states to 37046 states and 153272 transitions. [2021-07-13 20:27:04,979 INFO L78 Accepts]: Start accepts. Automaton has 37046 states and 153272 transitions. Word has length 39 [2021-07-13 20:27:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:04,979 INFO L482 AbstractCegarLoop]: Abstraction has 37046 states and 153272 transitions. [2021-07-13 20:27:04,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 37046 states and 153272 transitions. [2021-07-13 20:27:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:05,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:05,365 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:05,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 20:27:05,573 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:05,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:05,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1184792299, now seen corresponding path program 34 times [2021-07-13 20:27:05,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:05,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262681425] [2021-07-13 20:27:05,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:06,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:06,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262681425] [2021-07-13 20:27:06,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262681425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366326462] [2021-07-13 20:27:06,012 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:06,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:06,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:06,351 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 37 treesize of output 29 [2021-07-13 20:27:06,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:06,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:06,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:06,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:27:06,399 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:06,400 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 39 treesize of output 27 [2021-07-13 20:27:06,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:06,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:06,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:06,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:27:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:06,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366326462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:06,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:06,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218012736] [2021-07-13 20:27:06,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:06,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:06,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:06,451 INFO L87 Difference]: Start difference. First operand 37046 states and 153272 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:08,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:08,532 INFO L93 Difference]: Finished difference Result 69957 states and 285446 transitions. [2021-07-13 20:27:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:27:08,537 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:08,865 INFO L225 Difference]: With dead ends: 69957 [2021-07-13 20:27:08,865 INFO L226 Difference]: Without dead ends: 69867 [2021-07-13 20:27:08,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1147.9ms TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:27:08,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69867 states. [2021-07-13 20:27:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69867 to 37170. [2021-07-13 20:27:10,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37170 states, 37169 states have (on average 4.137749199601819) internal successors, (153796), 37169 states have internal predecessors, (153796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37170 states to 37170 states and 153796 transitions. [2021-07-13 20:27:10,386 INFO L78 Accepts]: Start accepts. Automaton has 37170 states and 153796 transitions. Word has length 39 [2021-07-13 20:27:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:10,386 INFO L482 AbstractCegarLoop]: Abstraction has 37170 states and 153796 transitions. [2021-07-13 20:27:10,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 37170 states and 153796 transitions. [2021-07-13 20:27:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:10,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:10,478 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:10,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:10,679 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:10,679 INFO L82 PathProgramCache]: Analyzing trace with hash -946859157, now seen corresponding path program 35 times [2021-07-13 20:27:10,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:10,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631027407] [2021-07-13 20:27:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:11,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:11,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631027407] [2021-07-13 20:27:11,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631027407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:11,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119148794] [2021-07-13 20:27:11,026 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:11,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:27:11,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:27:11,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:11,547 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 37 treesize of output 29 [2021-07-13 20:27:11,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:11,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:11,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:11,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-13 20:27:11,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:11,644 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 37 treesize of output 55 [2021-07-13 20:27:11,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:11,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:11,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:11,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:55, output treesize:37 [2021-07-13 20:27:11,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:11,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:11,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:11,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:11,853 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 20 treesize of output 39 [2021-07-13 20:27:11,858 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:11,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:11,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:11,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:27:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:11,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119148794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:11,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:11,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:27:11,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935579845] [2021-07-13 20:27:11,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:27:11,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:11,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:27:11,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:11,953 INFO L87 Difference]: Start difference. First operand 37170 states and 153796 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:13,174 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-07-13 20:27:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:18,924 INFO L93 Difference]: Finished difference Result 120785 states and 490537 transitions. [2021-07-13 20:27:18,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-07-13 20:27:18,924 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:19,572 INFO L225 Difference]: With dead ends: 120785 [2021-07-13 20:27:19,572 INFO L226 Difference]: Without dead ends: 120491 [2021-07-13 20:27:19,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2480 ImplicationChecksByTransitivity, 4365.7ms TimeCoverageRelationStatistics Valid=1442, Invalid=7114, Unknown=0, NotChecked=0, Total=8556 [2021-07-13 20:27:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120491 states. [2021-07-13 20:27:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120491 to 36914. [2021-07-13 20:27:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36914 states, 36913 states have (on average 4.138812884349687) internal successors, (152776), 36913 states have internal predecessors, (152776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36914 states to 36914 states and 152776 transitions. [2021-07-13 20:27:21,974 INFO L78 Accepts]: Start accepts. Automaton has 36914 states and 152776 transitions. Word has length 39 [2021-07-13 20:27:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:21,976 INFO L482 AbstractCegarLoop]: Abstraction has 36914 states and 152776 transitions. [2021-07-13 20:27:21,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:21,976 INFO L276 IsEmpty]: Start isEmpty. Operand 36914 states and 152776 transitions. [2021-07-13 20:27:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:22,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:22,075 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:22,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:22,277 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:22,277 INFO L82 PathProgramCache]: Analyzing trace with hash 475346227, now seen corresponding path program 36 times [2021-07-13 20:27:22,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:22,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262734221] [2021-07-13 20:27:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:22,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262734221] [2021-07-13 20:27:22,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262734221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:22,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939156146] [2021-07-13 20:27:22,590 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:22,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:27:22,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:27:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:22,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,905 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 37 treesize of output 45 [2021-07-13 20:27:22,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:22,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:22,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:22,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:60 [2021-07-13 20:27:23,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-13 20:27:23,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:23,068 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:27:23,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:27:23,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:23,086 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:27:23,086 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 30 treesize of output 26 [2021-07-13 20:27:23,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:23,124 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:27:23,125 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 32 treesize of output 46 [2021-07-13 20:27:23,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:23,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:27:23,226 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:149 [2021-07-13 20:27:23,477 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-07-13 20:27:23,724 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,724 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 16 [2021-07-13 20:27:23,726 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:23,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:23,762 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 11 treesize of output 3 [2021-07-13 20:27:23,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:23,798 INFO L628 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2021-07-13 20:27:23,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:23,801 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:41 [2021-07-13 20:27:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:23,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939156146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:23,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:23,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:27:23,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046226353] [2021-07-13 20:27:23,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:27:23,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:27:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:23,933 INFO L87 Difference]: Start difference. First operand 36914 states and 152776 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:25,134 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-07-13 20:27:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:27,312 INFO L93 Difference]: Finished difference Result 72719 states and 295712 transitions. [2021-07-13 20:27:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:27:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:27,608 INFO L225 Difference]: With dead ends: 72719 [2021-07-13 20:27:27,608 INFO L226 Difference]: Without dead ends: 72609 [2021-07-13 20:27:27,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 2697.9ms TimeCoverageRelationStatistics Valid=875, Invalid=3681, Unknown=0, NotChecked=0, Total=4556 [2021-07-13 20:27:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72609 states. [2021-07-13 20:27:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72609 to 37105. [2021-07-13 20:27:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37105 states, 37104 states have (on average 4.1379905131522206) internal successors, (153536), 37104 states have internal predecessors, (153536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37105 states to 37105 states and 153536 transitions. [2021-07-13 20:27:29,460 INFO L78 Accepts]: Start accepts. Automaton has 37105 states and 153536 transitions. Word has length 39 [2021-07-13 20:27:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:29,460 INFO L482 AbstractCegarLoop]: Abstraction has 37105 states and 153536 transitions. [2021-07-13 20:27:29,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 37105 states and 153536 transitions. [2021-07-13 20:27:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:29,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:29,591 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:29,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 20:27:29,805 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:29,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:29,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1206490683, now seen corresponding path program 37 times [2021-07-13 20:27:29,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:29,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392354383] [2021-07-13 20:27:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:30,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:30,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392354383] [2021-07-13 20:27:30,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392354383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:30,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195831300] [2021-07-13 20:27:30,161 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:30,434 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 37 treesize of output 29 [2021-07-13 20:27:30,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:30,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:30,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:30,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:30,473 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:30,473 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 34 treesize of output 22 [2021-07-13 20:27:30,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:30,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:30,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:30,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-13 20:27:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:30,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195831300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:30,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:30,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:30,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202807072] [2021-07-13 20:27:30,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:30,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:30,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:30,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:30,540 INFO L87 Difference]: Start difference. First operand 37105 states and 153536 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:31,342 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-07-13 20:27:32,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:32,951 INFO L93 Difference]: Finished difference Result 87448 states and 357230 transitions. [2021-07-13 20:27:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:27:32,952 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:33,406 INFO L225 Difference]: With dead ends: 87448 [2021-07-13 20:27:33,406 INFO L226 Difference]: Without dead ends: 87393 [2021-07-13 20:27:33,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1327.7ms TimeCoverageRelationStatistics Valid=350, Invalid=1630, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:27:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87393 states. [2021-07-13 20:27:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87393 to 37362. [2021-07-13 20:27:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37362 states, 37361 states have (on average 4.1416450309145905) internal successors, (154736), 37361 states have internal predecessors, (154736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37362 states to 37362 states and 154736 transitions. [2021-07-13 20:27:35,274 INFO L78 Accepts]: Start accepts. Automaton has 37362 states and 154736 transitions. Word has length 39 [2021-07-13 20:27:35,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:35,274 INFO L482 AbstractCegarLoop]: Abstraction has 37362 states and 154736 transitions. [2021-07-13 20:27:35,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:35,275 INFO L276 IsEmpty]: Start isEmpty. Operand 37362 states and 154736 transitions. [2021-07-13 20:27:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:35,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:35,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:35,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 20:27:35,933 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:35,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1832087599, now seen corresponding path program 38 times [2021-07-13 20:27:35,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:35,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749488632] [2021-07-13 20:27:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:36,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749488632] [2021-07-13 20:27:36,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749488632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293078370] [2021-07-13 20:27:36,284 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:36,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:27:36,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:36,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:36,516 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 37 treesize of output 29 [2021-07-13 20:27:36,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:36,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:36,580 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:36,580 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 39 treesize of output 27 [2021-07-13 20:27:36,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:36,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:36,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:27:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:36,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293078370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:36,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:36,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:36,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458275667] [2021-07-13 20:27:36,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:36,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:36,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:36,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:36,630 INFO L87 Difference]: Start difference. First operand 37362 states and 154736 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:38,327 INFO L93 Difference]: Finished difference Result 73280 states and 301017 transitions. [2021-07-13 20:27:38,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:27:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:38,911 INFO L225 Difference]: With dead ends: 73280 [2021-07-13 20:27:38,912 INFO L226 Difference]: Without dead ends: 73225 [2021-07-13 20:27:38,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1126.0ms TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:27:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73225 states. [2021-07-13 20:27:40,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73225 to 37610. [2021-07-13 20:27:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37610 states, 37609 states have (on average 4.143263580525938) internal successors, (155824), 37609 states have internal predecessors, (155824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37610 states to 37610 states and 155824 transitions. [2021-07-13 20:27:40,572 INFO L78 Accepts]: Start accepts. Automaton has 37610 states and 155824 transitions. Word has length 39 [2021-07-13 20:27:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:40,572 INFO L482 AbstractCegarLoop]: Abstraction has 37610 states and 155824 transitions. [2021-07-13 20:27:40,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 37610 states and 155824 transitions. [2021-07-13 20:27:40,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:40,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:40,674 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:40,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 20:27:40,874 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:40,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:40,875 INFO L82 PathProgramCache]: Analyzing trace with hash -973527573, now seen corresponding path program 39 times [2021-07-13 20:27:40,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:40,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863719736] [2021-07-13 20:27:40,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:41,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:41,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863719736] [2021-07-13 20:27:41,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863719736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:41,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247419073] [2021-07-13 20:27:41,182 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:41,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:27:41,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:27:41,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:41,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,463 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 39 treesize of output 47 [2021-07-13 20:27:41,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:57, output treesize:66 [2021-07-13 20:27:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:41,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:27:41,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:41,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:27:41,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,652 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:27:41,653 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 30 treesize of output 26 [2021-07-13 20:27:41,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:41,662 INFO L354 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 20:27:41,662 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 56 treesize of output 1 [2021-07-13 20:27:41,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:41,943 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-07-13 20:27:41,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:41,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:27:41,959 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:245, output treesize:189 [2021-07-13 20:27:42,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:42,080 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 16 [2021-07-13 20:27:42,082 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:42,188 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-13 20:27:42,189 INFO L628 ElimStorePlain]: treesize reduction 27, result has 83.5 percent of original size [2021-07-13 20:27:42,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:42,197 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 16 [2021-07-13 20:27:42,198 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:42,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:42,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:42,258 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 16 [2021-07-13 20:27:42,259 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:42,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:42,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:27:42,321 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:165, output treesize:152 [2021-07-13 20:27:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:42,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247419073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:42,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:42,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:27:42,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423543197] [2021-07-13 20:27:42,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:27:42,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:27:42,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:27:42,560 INFO L87 Difference]: Start difference. First operand 37610 states and 155824 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:43,193 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-07-13 20:27:43,508 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-07-13 20:27:44,357 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-13 20:27:45,331 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-07-13 20:27:45,658 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-07-13 20:27:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:46,815 INFO L93 Difference]: Finished difference Result 72090 states and 292918 transitions. [2021-07-13 20:27:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 20:27:46,815 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:47,150 INFO L225 Difference]: With dead ends: 72090 [2021-07-13 20:27:47,150 INFO L226 Difference]: Without dead ends: 71980 [2021-07-13 20:27:47,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 3358.0ms TimeCoverageRelationStatistics Valid=850, Invalid=3572, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 20:27:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71980 states. [2021-07-13 20:27:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71980 to 37688. [2021-07-13 20:27:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37688 states, 37687 states have (on average 4.1424894525963865) internal successors, (156118), 37687 states have internal predecessors, (156118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37688 states to 37688 states and 156118 transitions. [2021-07-13 20:27:48,722 INFO L78 Accepts]: Start accepts. Automaton has 37688 states and 156118 transitions. Word has length 39 [2021-07-13 20:27:48,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:48,722 INFO L482 AbstractCegarLoop]: Abstraction has 37688 states and 156118 transitions. [2021-07-13 20:27:48,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 37688 states and 156118 transitions. [2021-07-13 20:27:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:48,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:48,824 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:49,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,025 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1451354431, now seen corresponding path program 40 times [2021-07-13 20:27:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:49,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568313716] [2021-07-13 20:27:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:49,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:49,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568313716] [2021-07-13 20:27:49,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568313716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:49,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759565375] [2021-07-13 20:27:49,602 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:49,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:27:49,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:27:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:49,886 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 37 treesize of output 29 [2021-07-13 20:27:49,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:49,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:49,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:49,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:27:49,971 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:27:49,972 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 39 treesize of output 27 [2021-07-13 20:27:49,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:49,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:49,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:49,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:27:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:50,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759565375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:50,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:50,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:27:50,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743263220] [2021-07-13 20:27:50,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:27:50,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:27:50,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:27:50,032 INFO L87 Difference]: Start difference. First operand 37688 states and 156118 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:52,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:27:52,488 INFO L93 Difference]: Finished difference Result 86865 states and 355556 transitions. [2021-07-13 20:27:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:27:52,489 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:27:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:27:52,918 INFO L225 Difference]: With dead ends: 86865 [2021-07-13 20:27:52,918 INFO L226 Difference]: Without dead ends: 86810 [2021-07-13 20:27:52,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1337.4ms TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:27:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86810 states. [2021-07-13 20:27:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86810 to 37742. [2021-07-13 20:27:54,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37742 states, 37741 states have (on average 4.146207042738666) internal successors, (156482), 37741 states have internal predecessors, (156482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37742 states to 37742 states and 156482 transitions. [2021-07-13 20:27:54,635 INFO L78 Accepts]: Start accepts. Automaton has 37742 states and 156482 transitions. Word has length 39 [2021-07-13 20:27:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:27:54,635 INFO L482 AbstractCegarLoop]: Abstraction has 37742 states and 156482 transitions. [2021-07-13 20:27:54,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:27:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 37742 states and 156482 transitions. [2021-07-13 20:27:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:27:54,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:27:54,738 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:27:54,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 20:27:54,938 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:27:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:27:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash -653921383, now seen corresponding path program 41 times [2021-07-13 20:27:54,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:27:54,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233217013] [2021-07-13 20:27:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:27:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:27:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:55,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:27:55,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233217013] [2021-07-13 20:27:55,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233217013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:55,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432506731] [2021-07-13 20:27:55,726 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:27:55,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:27:55,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:27:55,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:27:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:27:55,994 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:55,994 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 31 treesize of output 49 [2021-07-13 20:27:55,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:56,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:56,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:27:56,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:50 [2021-07-13 20:27:56,137 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 35 treesize of output 27 [2021-07-13 20:27:56,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:27:56,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:56,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:27:56,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:27:56,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:27:56,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:56,237 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 20 treesize of output 39 [2021-07-13 20:27:56,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:27:56,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:27:56,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:27:56,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:27:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:27:56,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432506731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:27:56,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:27:56,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:27:56,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589019863] [2021-07-13 20:27:56,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:27:56,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:27:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:27:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:27:56,327 INFO L87 Difference]: Start difference. First operand 37742 states and 156482 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:00,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:00,563 INFO L93 Difference]: Finished difference Result 68588 states and 279888 transitions. [2021-07-13 20:28:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 20:28:00,564 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:00,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:00,897 INFO L225 Difference]: With dead ends: 68588 [2021-07-13 20:28:00,898 INFO L226 Difference]: Without dead ends: 68367 [2021-07-13 20:28:00,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1230 ImplicationChecksByTransitivity, 3232.7ms TimeCoverageRelationStatistics Valid=756, Invalid=4356, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 20:28:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68367 states. [2021-07-13 20:28:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68367 to 38069. [2021-07-13 20:28:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38069 states, 38068 states have (on average 4.141194704213513) internal successors, (157647), 38068 states have internal predecessors, (157647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38069 states to 38069 states and 157647 transitions. [2021-07-13 20:28:02,494 INFO L78 Accepts]: Start accepts. Automaton has 38069 states and 157647 transitions. Word has length 39 [2021-07-13 20:28:02,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:02,494 INFO L482 AbstractCegarLoop]: Abstraction has 38069 states and 157647 transitions. [2021-07-13 20:28:02,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:02,494 INFO L276 IsEmpty]: Start isEmpty. Operand 38069 states and 157647 transitions. [2021-07-13 20:28:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:02,597 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:02,597 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:02,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:02,797 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:02,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1516384875, now seen corresponding path program 42 times [2021-07-13 20:28:02,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:02,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572768013] [2021-07-13 20:28:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:03,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572768013] [2021-07-13 20:28:03,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572768013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:03,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121489471] [2021-07-13 20:28:03,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:03,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:28:03,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:03,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:28:03,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:03,638 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:03,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:28:03,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:03,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:03,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:03,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:28 [2021-07-13 20:28:03,851 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-07-13 20:28:03,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:03,928 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 33 treesize of output 41 [2021-07-13 20:28:03,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:03,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:03,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:03,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-13 20:28:04,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:04,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:28:04,045 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:04,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:04,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:04,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:51 [2021-07-13 20:28:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:04,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121489471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:04,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:04,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-13 20:28:04,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283166354] [2021-07-13 20:28:04,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:28:04,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:04,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:28:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:28:04,184 INFO L87 Difference]: Start difference. First operand 38069 states and 157647 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:09,084 INFO L93 Difference]: Finished difference Result 76057 states and 306680 transitions. [2021-07-13 20:28:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-13 20:28:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:09,427 INFO L225 Difference]: With dead ends: 76057 [2021-07-13 20:28:09,428 INFO L226 Difference]: Without dead ends: 75706 [2021-07-13 20:28:09,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3794.2ms TimeCoverageRelationStatistics Valid=992, Invalid=5980, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 20:28:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75706 states. [2021-07-13 20:28:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75706 to 37904. [2021-07-13 20:28:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37904 states, 37903 states have (on average 4.142891064031871) internal successors, (157028), 37903 states have internal predecessors, (157028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37904 states to 37904 states and 157028 transitions. [2021-07-13 20:28:11,097 INFO L78 Accepts]: Start accepts. Automaton has 37904 states and 157028 transitions. Word has length 39 [2021-07-13 20:28:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:11,097 INFO L482 AbstractCegarLoop]: Abstraction has 37904 states and 157028 transitions. [2021-07-13 20:28:11,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:11,098 INFO L276 IsEmpty]: Start isEmpty. Operand 37904 states and 157028 transitions. [2021-07-13 20:28:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:11,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:11,188 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:11,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 20:28:11,388 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1495860655, now seen corresponding path program 43 times [2021-07-13 20:28:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:11,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301231421] [2021-07-13 20:28:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:11,727 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-07-13 20:28:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:12,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:12,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301231421] [2021-07-13 20:28:12,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301231421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:12,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305055284] [2021-07-13 20:28:12,103 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:12,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:12,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:12,369 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:12,370 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 33 treesize of output 21 [2021-07-13 20:28:12,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:12,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:12,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:12,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:28:12,414 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 35 treesize of output 27 [2021-07-13 20:28:12,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:12,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:12,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:12,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:28:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:12,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305055284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:12,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:12,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:12,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809485301] [2021-07-13 20:28:12,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:12,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:12,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:12,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:12,462 INFO L87 Difference]: Start difference. First operand 37904 states and 157028 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:13,428 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-07-13 20:28:14,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:14,357 INFO L93 Difference]: Finished difference Result 66378 states and 271263 transitions. [2021-07-13 20:28:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:28:14,357 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:14,821 INFO L225 Difference]: With dead ends: 66378 [2021-07-13 20:28:14,822 INFO L226 Difference]: Without dead ends: 66130 [2021-07-13 20:28:14,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1653.7ms TimeCoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 20:28:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66130 states. [2021-07-13 20:28:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66130 to 38078. [2021-07-13 20:28:16,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38078 states, 38077 states have (on average 4.141345168999659) internal successors, (157690), 38077 states have internal predecessors, (157690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38078 states to 38078 states and 157690 transitions. [2021-07-13 20:28:16,483 INFO L78 Accepts]: Start accepts. Automaton has 38078 states and 157690 transitions. Word has length 39 [2021-07-13 20:28:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:16,483 INFO L482 AbstractCegarLoop]: Abstraction has 38078 states and 157690 transitions. [2021-07-13 20:28:16,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 38078 states and 157690 transitions. [2021-07-13 20:28:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:16,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:16,578 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:16,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:16,779 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:16,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1172159941, now seen corresponding path program 44 times [2021-07-13 20:28:16,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:16,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582287516] [2021-07-13 20:28:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:17,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:17,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582287516] [2021-07-13 20:28:17,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582287516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:17,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230431941] [2021-07-13 20:28:17,210 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:17,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:17,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:17,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:17,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:17,487 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 37 treesize of output 29 [2021-07-13 20:28:17,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:17,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:17,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:17,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:17,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:17,529 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 39 treesize of output 27 [2021-07-13 20:28:17,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:17,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:17,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:17,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:17,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230431941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:17,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:17,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:17,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405336784] [2021-07-13 20:28:17,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:17,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:17,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:17,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:17,580 INFO L87 Difference]: Start difference. First operand 38078 states and 157690 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:20,086 INFO L93 Difference]: Finished difference Result 83791 states and 340816 transitions. [2021-07-13 20:28:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:28:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:20,700 INFO L225 Difference]: With dead ends: 83791 [2021-07-13 20:28:20,701 INFO L226 Difference]: Without dead ends: 83639 [2021-07-13 20:28:20,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1340.4ms TimeCoverageRelationStatistics Valid=399, Invalid=1857, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:28:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83639 states. [2021-07-13 20:28:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83639 to 38148. [2021-07-13 20:28:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38148 states, 38147 states have (on average 4.14213437491808) internal successors, (158010), 38147 states have internal predecessors, (158010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38148 states to 38148 states and 158010 transitions. [2021-07-13 20:28:22,461 INFO L78 Accepts]: Start accepts. Automaton has 38148 states and 158010 transitions. Word has length 39 [2021-07-13 20:28:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:22,461 INFO L482 AbstractCegarLoop]: Abstraction has 38148 states and 158010 transitions. [2021-07-13 20:28:22,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 38148 states and 158010 transitions. [2021-07-13 20:28:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:22,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:22,556 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:22,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:22,761 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:22,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1376080687, now seen corresponding path program 45 times [2021-07-13 20:28:22,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:22,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691442853] [2021-07-13 20:28:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:23,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:23,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691442853] [2021-07-13 20:28:23,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691442853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:23,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226481887] [2021-07-13 20:28:23,204 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:23,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:28:23,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:23,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:28:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:23,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:23,623 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 41 treesize of output 49 [2021-07-13 20:28:23,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:23,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:23,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:23,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:82 [2021-07-13 20:28:23,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:23,975 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 30 treesize of output 30 [2021-07-13 20:28:23,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:28:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,001 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 56 treesize of output 58 [2021-07-13 20:28:24,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:28:24,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:28:24,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:28:24,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:24,149 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-07-13 20:28:24,149 INFO L628 ElimStorePlain]: treesize reduction 58, result has 71.3 percent of original size [2021-07-13 20:28:24,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:28:24,163 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:247, output treesize:206 [2021-07-13 20:28:24,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,282 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 16 [2021-07-13 20:28:24,284 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:24,398 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2021-07-13 20:28:24,398 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.6 percent of original size [2021-07-13 20:28:24,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,407 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 16 [2021-07-13 20:28:24,408 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:24,511 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:28:24,512 INFO L628 ElimStorePlain]: treesize reduction 4, result has 97.2 percent of original size [2021-07-13 20:28:24,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,520 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 16 [2021-07-13 20:28:24,521 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:24,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:24,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:28:24,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:168, output treesize:154 [2021-07-13 20:28:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:24,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226481887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:24,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:24,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:28:24,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410371413] [2021-07-13 20:28:24,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:28:24,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:24,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:28:24,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:28:24,814 INFO L87 Difference]: Start difference. First operand 38148 states and 158010 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:28,430 INFO L93 Difference]: Finished difference Result 69869 states and 283258 transitions. [2021-07-13 20:28:28,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:28:28,430 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:28,777 INFO L225 Difference]: With dead ends: 69869 [2021-07-13 20:28:28,777 INFO L226 Difference]: Without dead ends: 69705 [2021-07-13 20:28:28,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 3177.6ms TimeCoverageRelationStatistics Valid=781, Invalid=3001, Unknown=0, NotChecked=0, Total=3782 [2021-07-13 20:28:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69705 states. [2021-07-13 20:28:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69705 to 38170. [2021-07-13 20:28:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38170 states, 38169 states have (on average 4.1419476538552225) internal successors, (158094), 38169 states have internal predecessors, (158094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38170 states to 38170 states and 158094 transitions. [2021-07-13 20:28:30,321 INFO L78 Accepts]: Start accepts. Automaton has 38170 states and 158094 transitions. Word has length 39 [2021-07-13 20:28:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:30,321 INFO L482 AbstractCegarLoop]: Abstraction has 38170 states and 158094 transitions. [2021-07-13 20:28:30,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 38170 states and 158094 transitions. [2021-07-13 20:28:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:30,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:30,405 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:30,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-07-13 20:28:30,606 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:30,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:30,606 INFO L82 PathProgramCache]: Analyzing trace with hash 898253829, now seen corresponding path program 46 times [2021-07-13 20:28:30,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:30,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060327265] [2021-07-13 20:28:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:30,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060327265] [2021-07-13 20:28:30,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060327265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:30,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651024312] [2021-07-13 20:28:30,979 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:31,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:28:31,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:31,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:31,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:31,257 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 37 treesize of output 29 [2021-07-13 20:28:31,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:31,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:31,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:31,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:31,313 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:31,314 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 39 treesize of output 27 [2021-07-13 20:28:31,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:31,486 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:28:31,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:31,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:31,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:31,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651024312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:31,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:31,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:31,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910566547] [2021-07-13 20:28:31,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:31,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:31,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:31,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:31,538 INFO L87 Difference]: Start difference. First operand 38170 states and 158094 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:33,614 INFO L93 Difference]: Finished difference Result 84103 states and 342659 transitions. [2021-07-13 20:28:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:28:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:34,208 INFO L225 Difference]: With dead ends: 84103 [2021-07-13 20:28:34,208 INFO L226 Difference]: Without dead ends: 84021 [2021-07-13 20:28:34,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1218.1ms TimeCoverageRelationStatistics Valid=395, Invalid=1767, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:28:34,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84021 states. [2021-07-13 20:28:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84021 to 37868. [2021-07-13 20:28:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37868 states, 37867 states have (on average 4.143607890775609) internal successors, (156906), 37867 states have internal predecessors, (156906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37868 states to 37868 states and 156906 transitions. [2021-07-13 20:28:35,955 INFO L78 Accepts]: Start accepts. Automaton has 37868 states and 156906 transitions. Word has length 39 [2021-07-13 20:28:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:35,956 INFO L482 AbstractCegarLoop]: Abstraction has 37868 states and 156906 transitions. [2021-07-13 20:28:35,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 37868 states and 156906 transitions. [2021-07-13 20:28:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:36,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:36,053 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:36,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:36,255 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:36,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:36,255 INFO L82 PathProgramCache]: Analyzing trace with hash 575171183, now seen corresponding path program 47 times [2021-07-13 20:28:36,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:36,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806660744] [2021-07-13 20:28:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:36,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:36,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806660744] [2021-07-13 20:28:36,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806660744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:36,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270260418] [2021-07-13 20:28:36,641 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:36,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:28:36,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:28:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:37,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-07-13 20:28:37,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:37,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:37,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-13 20:28:37,364 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 31 treesize of output 23 [2021-07-13 20:28:37,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:37,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:37,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-13 20:28:37,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,430 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 9 treesize of output 14 [2021-07-13 20:28:37,432 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:37,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:37,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:37,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-13 20:28:37,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:37,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270260418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:37,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:37,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:28:37,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088152496] [2021-07-13 20:28:37,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:28:37,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:37,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:28:37,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:28:37,520 INFO L87 Difference]: Start difference. First operand 37868 states and 156906 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:41,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:41,570 INFO L93 Difference]: Finished difference Result 72342 states and 294304 transitions. [2021-07-13 20:28:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 20:28:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:41,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:42,223 INFO L225 Difference]: With dead ends: 72342 [2021-07-13 20:28:42,223 INFO L226 Difference]: Without dead ends: 72001 [2021-07-13 20:28:42,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2542.0ms TimeCoverageRelationStatistics Valid=672, Invalid=4020, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:28:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72001 states. [2021-07-13 20:28:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72001 to 38419. [2021-07-13 20:28:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38419 states, 38418 states have (on average 4.137045135092925) internal successors, (158937), 38418 states have internal predecessors, (158937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38419 states to 38419 states and 158937 transitions. [2021-07-13 20:28:44,201 INFO L78 Accepts]: Start accepts. Automaton has 38419 states and 158937 transitions. Word has length 39 [2021-07-13 20:28:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:44,201 INFO L482 AbstractCegarLoop]: Abstraction has 38419 states and 158937 transitions. [2021-07-13 20:28:44,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 38419 states and 158937 transitions. [2021-07-13 20:28:44,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:44,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:44,355 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:44,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 20:28:44,556 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:44,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:44,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1727088047, now seen corresponding path program 48 times [2021-07-13 20:28:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:44,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881671615] [2021-07-13 20:28:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:44,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881671615] [2021-07-13 20:28:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881671615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202588248] [2021-07-13 20:28:44,970 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:45,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:28:45,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:45,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:28:45,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:45,258 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:45,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-07-13 20:28:45,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:45,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:45,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:45,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-07-13 20:28:45,306 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 31 treesize of output 23 [2021-07-13 20:28:45,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:45,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:45,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:28:45,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:18 [2021-07-13 20:28:45,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:45,367 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 9 treesize of output 14 [2021-07-13 20:28:45,369 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:45,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:45,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:28:45,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-13 20:28:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:45,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202588248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:45,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:45,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:28:45,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711262242] [2021-07-13 20:28:45,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:28:45,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:45,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:28:45,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:28:45,433 INFO L87 Difference]: Start difference. First operand 38419 states and 158937 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:49,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:49,147 INFO L93 Difference]: Finished difference Result 91087 states and 370453 transitions. [2021-07-13 20:28:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 20:28:49,147 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:49,595 INFO L225 Difference]: With dead ends: 91087 [2021-07-13 20:28:49,595 INFO L226 Difference]: Without dead ends: 90900 [2021-07-13 20:28:49,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 2136.3ms TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:28:49,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90900 states. [2021-07-13 20:28:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90900 to 38186. [2021-07-13 20:28:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38186 states, 38185 states have (on average 4.1405787612937015) internal successors, (158108), 38185 states have internal predecessors, (158108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38186 states to 38186 states and 158108 transitions. [2021-07-13 20:28:51,652 INFO L78 Accepts]: Start accepts. Automaton has 38186 states and 158108 transitions. Word has length 39 [2021-07-13 20:28:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:51,668 INFO L482 AbstractCegarLoop]: Abstraction has 38186 states and 158108 transitions. [2021-07-13 20:28:51,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 38186 states and 158108 transitions. [2021-07-13 20:28:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:51,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:51,805 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:52,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:52,005 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash 251470469, now seen corresponding path program 49 times [2021-07-13 20:28:52,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:52,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083770094] [2021-07-13 20:28:52,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:52,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:52,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083770094] [2021-07-13 20:28:52,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083770094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:52,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872588919] [2021-07-13 20:28:52,370 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:52,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:52,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:52,649 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 37 treesize of output 29 [2021-07-13 20:28:52,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:52,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:52,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:52,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:52,688 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:52,689 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 39 treesize of output 27 [2021-07-13 20:28:52,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:52,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:52,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:52,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:52,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:52,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872588919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:52,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:52,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:52,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001131332] [2021-07-13 20:28:52,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:52,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:52,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:52,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:52,739 INFO L87 Difference]: Start difference. First operand 38186 states and 158108 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:28:55,036 INFO L93 Difference]: Finished difference Result 84472 states and 343708 transitions. [2021-07-13 20:28:55,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:28:55,036 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:28:55,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:28:55,415 INFO L225 Difference]: With dead ends: 84472 [2021-07-13 20:28:55,415 INFO L226 Difference]: Without dead ends: 84320 [2021-07-13 20:28:55,415 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=411, Invalid=2039, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:28:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84320 states. [2021-07-13 20:28:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84320 to 38354. [2021-07-13 20:28:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 4.140797330065444) internal successors, (158812), 38353 states have internal predecessors, (158812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 158812 transitions. [2021-07-13 20:28:57,415 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 158812 transitions. Word has length 39 [2021-07-13 20:28:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:28:57,415 INFO L482 AbstractCegarLoop]: Abstraction has 38354 states and 158812 transitions. [2021-07-13 20:28:57,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 158812 transitions. [2021-07-13 20:28:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:28:57,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:28:57,538 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:28:57,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 20:28:57,739 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:28:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:28:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash 455391215, now seen corresponding path program 50 times [2021-07-13 20:28:57,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:28:57,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545384437] [2021-07-13 20:28:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:28:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:28:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:58,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:28:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545384437] [2021-07-13 20:28:58,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545384437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:58,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629299408] [2021-07-13 20:28:58,117 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:28:58,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:28:58,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:28:58,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:28:58,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:28:58,366 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 37 treesize of output 29 [2021-07-13 20:28:58,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:58,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:58,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:58,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:28:58,403 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:28:58,404 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 39 treesize of output 27 [2021-07-13 20:28:58,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:28:58,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:28:58,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:28:58,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:28:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:28:58,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629299408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:28:58,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:28:58,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:28:58,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421536647] [2021-07-13 20:28:58,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:28:58,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:28:58,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:28:58,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:28:58,452 INFO L87 Difference]: Start difference. First operand 38354 states and 158812 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:28:59,020 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-07-13 20:29:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:00,438 INFO L93 Difference]: Finished difference Result 72197 states and 294895 transitions. [2021-07-13 20:29:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:29:00,438 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:00,781 INFO L225 Difference]: With dead ends: 72197 [2021-07-13 20:29:00,781 INFO L226 Difference]: Without dead ends: 72091 [2021-07-13 20:29:00,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1276.8ms TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:29:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72091 states. [2021-07-13 20:29:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72091 to 38120. [2021-07-13 20:29:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38120 states, 38119 states have (on average 4.141661638552953) internal successors, (157876), 38119 states have internal predecessors, (157876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:02,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38120 states to 38120 states and 157876 transitions. [2021-07-13 20:29:02,365 INFO L78 Accepts]: Start accepts. Automaton has 38120 states and 157876 transitions. Word has length 39 [2021-07-13 20:29:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:02,366 INFO L482 AbstractCegarLoop]: Abstraction has 38120 states and 157876 transitions. [2021-07-13 20:29:02,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:02,366 INFO L276 IsEmpty]: Start isEmpty. Operand 38120 states and 157876 transitions. [2021-07-13 20:29:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:02,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:02,466 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:02,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 20:29:02,669 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash -175003259, now seen corresponding path program 51 times [2021-07-13 20:29:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:02,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982385479] [2021-07-13 20:29:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:03,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:03,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982385479] [2021-07-13 20:29:03,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982385479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:03,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086056532] [2021-07-13 20:29:03,226 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:03,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:29:03,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:03,530 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 39 treesize of output 31 [2021-07-13 20:29:03,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:03,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:03,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:03,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:35 [2021-07-13 20:29:03,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:03,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:03,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2021-07-13 20:29:03,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:03,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:03,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-13 20:29:03,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:71 [2021-07-13 20:29:03,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:03,774 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 16 [2021-07-13 20:29:03,775 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:03,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:03,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:03,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:29:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:03,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086056532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:03,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:03,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:29:03,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333406249] [2021-07-13 20:29:03,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:29:03,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:03,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:29:03,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:29:03,833 INFO L87 Difference]: Start difference. First operand 38120 states and 157876 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:04,880 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-07-13 20:29:07,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:07,878 INFO L93 Difference]: Finished difference Result 83885 states and 339235 transitions. [2021-07-13 20:29:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-13 20:29:07,878 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:08,281 INFO L225 Difference]: With dead ends: 83885 [2021-07-13 20:29:08,281 INFO L226 Difference]: Without dead ends: 83494 [2021-07-13 20:29:08,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2954.9ms TimeCoverageRelationStatistics Valid=827, Invalid=4723, Unknown=0, NotChecked=0, Total=5550 [2021-07-13 20:29:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83494 states. [2021-07-13 20:29:09,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83494 to 38451. [2021-07-13 20:29:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.140988296488946) internal successors, (159221), 38450 states have internal predecessors, (159221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 159221 transitions. [2021-07-13 20:29:09,945 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 159221 transitions. Word has length 39 [2021-07-13 20:29:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:09,945 INFO L482 AbstractCegarLoop]: Abstraction has 38451 states and 159221 transitions. [2021-07-13 20:29:09,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 159221 transitions. [2021-07-13 20:29:10,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:10,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:10,036 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:10,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:10,241 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash -448909371, now seen corresponding path program 52 times [2021-07-13 20:29:10,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:10,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393249339] [2021-07-13 20:29:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:10,810 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-07-13 20:29:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:10,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:10,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393249339] [2021-07-13 20:29:10,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393249339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:10,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652377093] [2021-07-13 20:29:10,830 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:10,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:29:10,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:10,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:11,084 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 37 treesize of output 29 [2021-07-13 20:29:11,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:11,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:11,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:11,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:29:11,149 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:11,149 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 39 treesize of output 27 [2021-07-13 20:29:11,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:11,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:11,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:11,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:29:11,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:11,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652377093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:11,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:11,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:29:11,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139404277] [2021-07-13 20:29:11,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:29:11,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:11,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:29:11,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:29:11,197 INFO L87 Difference]: Start difference. First operand 38451 states and 159221 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:13,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:13,431 INFO L93 Difference]: Finished difference Result 91888 states and 374497 transitions. [2021-07-13 20:29:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:29:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:13,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:13,901 INFO L225 Difference]: With dead ends: 91888 [2021-07-13 20:29:13,902 INFO L226 Difference]: Without dead ends: 91806 [2021-07-13 20:29:13,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1323.5ms TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:29:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91806 states. [2021-07-13 20:29:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91806 to 38617. [2021-07-13 20:29:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38617 states, 38616 states have (on average 4.140692977004351) internal successors, (159897), 38616 states have internal predecessors, (159897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38617 states to 38617 states and 159897 transitions. [2021-07-13 20:29:15,714 INFO L78 Accepts]: Start accepts. Automaton has 38617 states and 159897 transitions. Word has length 39 [2021-07-13 20:29:15,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:15,714 INFO L482 AbstractCegarLoop]: Abstraction has 38617 states and 159897 transitions. [2021-07-13 20:29:15,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38617 states and 159897 transitions. [2021-07-13 20:29:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:15,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:15,818 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:16,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-13 20:29:16,019 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:16,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:16,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1568844437, now seen corresponding path program 53 times [2021-07-13 20:29:16,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:16,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785958440] [2021-07-13 20:29:16,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:16,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:16,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785958440] [2021-07-13 20:29:16,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785958440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:16,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438715569] [2021-07-13 20:29:16,641 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:16,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:29:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:29:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:17,037 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,038 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 41 treesize of output 49 [2021-07-13 20:29:17,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:17,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:17,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:100 [2021-07-13 20:29:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,219 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 30 treesize of output 42 [2021-07-13 20:29:17,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:17,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,247 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 43 treesize of output 61 [2021-07-13 20:29:17,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:17,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:29:17,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-07-13 20:29:17,257 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:17,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:29:17,290 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:168, output treesize:90 [2021-07-13 20:29:17,378 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_10], 6=[q2]} [2021-07-13 20:29:17,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,394 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 32 [2021-07-13 20:29:17,397 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:17,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:17,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,448 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 22 treesize of output 41 [2021-07-13 20:29:17,451 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:17,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:17,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:29:17,490 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:110, output treesize:77 [2021-07-13 20:29:17,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:17,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438715569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:17,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:17,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:29:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362531525] [2021-07-13 20:29:17,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:29:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:17,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:29:17,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:29:17,621 INFO L87 Difference]: Start difference. First operand 38617 states and 159897 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:18,052 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-07-13 20:29:23,971 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 72 [2021-07-13 20:29:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:27,169 INFO L93 Difference]: Finished difference Result 103801 states and 418808 transitions. [2021-07-13 20:29:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-07-13 20:29:27,170 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:27,636 INFO L225 Difference]: With dead ends: 103801 [2021-07-13 20:29:27,636 INFO L226 Difference]: Without dead ends: 103476 [2021-07-13 20:29:27,636 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 7721.0ms TimeCoverageRelationStatistics Valid=2280, Invalid=12482, Unknown=0, NotChecked=0, Total=14762 [2021-07-13 20:29:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103476 states. [2021-07-13 20:29:29,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103476 to 38764. [2021-07-13 20:29:29,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.139566081056678) internal successors, (160462), 38763 states have internal predecessors, (160462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160462 transitions. [2021-07-13 20:29:29,853 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160462 transitions. Word has length 39 [2021-07-13 20:29:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:29,853 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160462 transitions. [2021-07-13 20:29:29,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160462 transitions. [2021-07-13 20:29:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:29,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:29,949 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:30,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 20:29:30,153 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:30,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:30,153 INFO L82 PathProgramCache]: Analyzing trace with hash -259731149, now seen corresponding path program 54 times [2021-07-13 20:29:30,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:30,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535265555] [2021-07-13 20:29:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:30,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:30,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535265555] [2021-07-13 20:29:30,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535265555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:30,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544771152] [2021-07-13 20:29:30,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:30,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:29:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:30,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:29:30,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:30,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:30,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-07-13 20:29:30,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:30,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:31,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:69 [2021-07-13 20:29:31,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:31,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,205 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 30 treesize of output 38 [2021-07-13 20:29:31,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:31,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 36 [2021-07-13 20:29:31,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:31,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2021-07-13 20:29:31,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 20:29:31,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:31,246 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-07-13 20:29:31,246 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 39 treesize of output 1 [2021-07-13 20:29:31,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:31,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:29:31,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:246, output treesize:116 [2021-07-13 20:29:31,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,507 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 16 [2021-07-13 20:29:31,509 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:31,595 INFO L628 ElimStorePlain]: treesize reduction 21, result has 83.2 percent of original size [2021-07-13 20:29:31,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,603 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 16 [2021-07-13 20:29:31,604 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:31,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:31,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:29:31,652 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:112 [2021-07-13 20:29:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:31,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544771152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:31,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:31,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:29:31,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859360498] [2021-07-13 20:29:31,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:29:31,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:31,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:29:31,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:29:31,899 INFO L87 Difference]: Start difference. First operand 38764 states and 160462 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:32,275 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-07-13 20:29:32,446 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-07-13 20:29:33,281 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-13 20:29:35,929 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-07-13 20:29:36,186 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-07-13 20:29:36,568 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-13 20:29:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:37,165 INFO L93 Difference]: Finished difference Result 74351 states and 301109 transitions. [2021-07-13 20:29:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-13 20:29:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:37,704 INFO L225 Difference]: With dead ends: 74351 [2021-07-13 20:29:37,705 INFO L226 Difference]: Without dead ends: 74179 [2021-07-13 20:29:37,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 4374.7ms TimeCoverageRelationStatistics Valid=1204, Invalid=4958, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 20:29:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74179 states. [2021-07-13 20:29:39,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74179 to 38810. [2021-07-13 20:29:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38810 states, 38809 states have (on average 4.139194516735809) internal successors, (160638), 38809 states have internal predecessors, (160638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38810 states to 38810 states and 160638 transitions. [2021-07-13 20:29:39,424 INFO L78 Accepts]: Start accepts. Automaton has 38810 states and 160638 transitions. Word has length 39 [2021-07-13 20:29:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:39,424 INFO L482 AbstractCegarLoop]: Abstraction has 38810 states and 160638 transitions. [2021-07-13 20:29:39,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 38810 states and 160638 transitions. [2021-07-13 20:29:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:39,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:39,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:39,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:39,714 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:39,715 INFO L82 PathProgramCache]: Analyzing trace with hash -737558007, now seen corresponding path program 55 times [2021-07-13 20:29:39,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:39,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872689996] [2021-07-13 20:29:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:40,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:40,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872689996] [2021-07-13 20:29:40,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872689996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:40,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048752229] [2021-07-13 20:29:40,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:40,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:40,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:40,293 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 37 treesize of output 29 [2021-07-13 20:29:40,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:40,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:40,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:40,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:29:40,332 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:40,332 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 34 treesize of output 22 [2021-07-13 20:29:40,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:40,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:40,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:40,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:29:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:40,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048752229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:40,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:40,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:29:40,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588242384] [2021-07-13 20:29:40,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:29:40,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:29:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:29:40,399 INFO L87 Difference]: Start difference. First operand 38810 states and 160638 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:42,471 INFO L93 Difference]: Finished difference Result 90479 states and 368460 transitions. [2021-07-13 20:29:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:29:42,471 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:43,119 INFO L225 Difference]: With dead ends: 90479 [2021-07-13 20:29:43,119 INFO L226 Difference]: Without dead ends: 90397 [2021-07-13 20:29:43,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1315.8ms TimeCoverageRelationStatistics Valid=356, Invalid=1714, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:29:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90397 states. [2021-07-13 20:29:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90397 to 38948. [2021-07-13 20:29:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38948 states, 38947 states have (on average 4.1378796826456465) internal successors, (161158), 38947 states have internal predecessors, (161158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38948 states to 38948 states and 161158 transitions. [2021-07-13 20:29:44,910 INFO L78 Accepts]: Start accepts. Automaton has 38948 states and 161158 transitions. Word has length 39 [2021-07-13 20:29:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:44,910 INFO L482 AbstractCegarLoop]: Abstraction has 38948 states and 161158 transitions. [2021-07-13 20:29:44,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 38948 states and 161158 transitions. [2021-07-13 20:29:45,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:45,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:45,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:45,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:45,211 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -707566413, now seen corresponding path program 56 times [2021-07-13 20:29:45,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:45,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221667413] [2021-07-13 20:29:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:45,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:45,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221667413] [2021-07-13 20:29:45,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221667413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:45,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127325504] [2021-07-13 20:29:45,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:29:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:29:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:46,025 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 37 treesize of output 29 [2021-07-13 20:29:46,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:29:46,096 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:29:46,096 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 39 treesize of output 27 [2021-07-13 20:29:46,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:46,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:46,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:29:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:46,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127325504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:46,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:46,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:29:46,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435726339] [2021-07-13 20:29:46,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:29:46,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:46,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:29:46,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:29:46,142 INFO L87 Difference]: Start difference. First operand 38948 states and 161158 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:49,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:49,038 INFO L93 Difference]: Finished difference Result 111695 states and 453391 transitions. [2021-07-13 20:29:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:29:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:49,647 INFO L225 Difference]: With dead ends: 111695 [2021-07-13 20:29:49,647 INFO L226 Difference]: Without dead ends: 111575 [2021-07-13 20:29:49,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1387.2ms TimeCoverageRelationStatistics Valid=462, Invalid=2294, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:29:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111575 states. [2021-07-13 20:29:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111575 to 38320. [2021-07-13 20:29:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38320 states, 38319 states have (on average 4.140922257887732) internal successors, (158676), 38319 states have internal predecessors, (158676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38320 states to 38320 states and 158676 transitions. [2021-07-13 20:29:52,069 INFO L78 Accepts]: Start accepts. Automaton has 38320 states and 158676 transitions. Word has length 39 [2021-07-13 20:29:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:29:52,069 INFO L482 AbstractCegarLoop]: Abstraction has 38320 states and 158676 transitions. [2021-07-13 20:29:52,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 38320 states and 158676 transitions. [2021-07-13 20:29:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:29:52,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:29:52,193 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:29:52,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:52,415 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:29:52,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:29:52,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1646067281, now seen corresponding path program 57 times [2021-07-13 20:29:52,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:29:52,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144090898] [2021-07-13 20:29:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:29:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:29:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:52,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:29:52,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144090898] [2021-07-13 20:29:52,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144090898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:52,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518961648] [2021-07-13 20:29:52,858 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:29:52,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:29:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:29:52,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:29:52,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:29:53,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:29:53,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-13 20:29:53,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:53,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:53,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:29:53,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-13 20:29:53,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:53,612 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 33 treesize of output 41 [2021-07-13 20:29:53,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:29:53,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:53,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:29:53,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-13 20:29:53,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:53,689 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 16 [2021-07-13 20:29:53,691 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:53,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:29:53,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:29:53,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-13 20:29:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:29:53,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518961648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:29:53,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:29:53,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:29:53,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589145613] [2021-07-13 20:29:53,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:29:53,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:29:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:29:53,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:29:53,885 INFO L87 Difference]: Start difference. First operand 38320 states and 158676 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:29:59,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:29:59,060 INFO L93 Difference]: Finished difference Result 66215 states and 267753 transitions. [2021-07-13 20:29:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-07-13 20:29:59,060 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:29:59,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:29:59,344 INFO L225 Difference]: With dead ends: 66215 [2021-07-13 20:29:59,344 INFO L226 Difference]: Without dead ends: 66067 [2021-07-13 20:29:59,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 4506.4ms TimeCoverageRelationStatistics Valid=977, Invalid=6855, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:29:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66067 states. [2021-07-13 20:30:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66067 to 38912. [2021-07-13 20:30:00,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38912 states, 38911 states have (on average 4.136722263627252) internal successors, (160964), 38911 states have internal predecessors, (160964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38912 states to 38912 states and 160964 transitions. [2021-07-13 20:30:00,823 INFO L78 Accepts]: Start accepts. Automaton has 38912 states and 160964 transitions. Word has length 39 [2021-07-13 20:30:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:00,824 INFO L482 AbstractCegarLoop]: Abstraction has 38912 states and 160964 transitions. [2021-07-13 20:30:00,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:00,824 INFO L276 IsEmpty]: Start isEmpty. Operand 38912 states and 160964 transitions. [2021-07-13 20:30:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:01,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:01,261 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:01,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2021-07-13 20:30:01,466 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:01,467 INFO L82 PathProgramCache]: Analyzing trace with hash 967063105, now seen corresponding path program 58 times [2021-07-13 20:30:01,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:01,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587508526] [2021-07-13 20:30:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:01,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587508526] [2021-07-13 20:30:01,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587508526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423462571] [2021-07-13 20:30:01,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:01,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:01,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:02,146 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:02,146 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 28 treesize of output 16 [2021-07-13 20:30:02,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:02,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:02,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:02,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:30:02,239 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 35 treesize of output 27 [2021-07-13 20:30:02,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:02,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:02,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:02,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:30:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:02,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423462571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:02,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:02,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:02,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748607355] [2021-07-13 20:30:02,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:02,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:02,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:02,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:02,287 INFO L87 Difference]: Start difference. First operand 38912 states and 160964 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:04,845 INFO L93 Difference]: Finished difference Result 85324 states and 346778 transitions. [2021-07-13 20:30:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:30:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:05,231 INFO L225 Difference]: With dead ends: 85324 [2021-07-13 20:30:05,232 INFO L226 Difference]: Without dead ends: 85108 [2021-07-13 20:30:05,232 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1462.9ms TimeCoverageRelationStatistics Valid=439, Invalid=2423, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:30:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85108 states. [2021-07-13 20:30:06,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85108 to 38662. [2021-07-13 20:30:06,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38662 states, 38661 states have (on average 4.14127932541838) internal successors, (160106), 38661 states have internal predecessors, (160106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:07,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38662 states to 38662 states and 160106 transitions. [2021-07-13 20:30:07,301 INFO L78 Accepts]: Start accepts. Automaton has 38662 states and 160106 transitions. Word has length 39 [2021-07-13 20:30:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:07,301 INFO L482 AbstractCegarLoop]: Abstraction has 38662 states and 160106 transitions. [2021-07-13 20:30:07,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 38662 states and 160106 transitions. [2021-07-13 20:30:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:07,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:07,418 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:07,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:07,625 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:07,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:07,625 INFO L82 PathProgramCache]: Analyzing trace with hash 165788335, now seen corresponding path program 59 times [2021-07-13 20:30:07,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:07,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412989972] [2021-07-13 20:30:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:07,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:07,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:07,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412989972] [2021-07-13 20:30:07,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412989972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:07,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98117085] [2021-07-13 20:30:07,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:07,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:30:07,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:30:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:08,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:08,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:08,158 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 30 treesize of output 48 [2021-07-13 20:30:08,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:08,187 INFO L628 ElimStorePlain]: treesize reduction 37, result has 51.3 percent of original size [2021-07-13 20:30:08,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:08,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:40 [2021-07-13 20:30:08,250 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 32 treesize of output 24 [2021-07-13 20:30:08,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:08,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:08,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:08,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:14 [2021-07-13 20:30:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:08,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:08,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:08,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:08,328 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 22 treesize of output 41 [2021-07-13 20:30:08,331 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:08,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:08,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:08,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-13 20:30:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:08,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98117085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:08,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:08,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:30:08,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143682870] [2021-07-13 20:30:08,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:30:08,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:08,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:30:08,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:30:08,387 INFO L87 Difference]: Start difference. First operand 38662 states and 160106 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:11,874 INFO L93 Difference]: Finished difference Result 64664 states and 263109 transitions. [2021-07-13 20:30:11,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 20:30:11,874 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:12,170 INFO L225 Difference]: With dead ends: 64664 [2021-07-13 20:30:12,170 INFO L226 Difference]: Without dead ends: 64554 [2021-07-13 20:30:12,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 2307.9ms TimeCoverageRelationStatistics Valid=687, Invalid=4005, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 20:30:12,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64554 states. [2021-07-13 20:30:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64554 to 38976. [2021-07-13 20:30:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38976 states, 38975 states have (on average 4.139345734445157) internal successors, (161331), 38975 states have internal predecessors, (161331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:13,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38976 states to 38976 states and 161331 transitions. [2021-07-13 20:30:13,695 INFO L78 Accepts]: Start accepts. Automaton has 38976 states and 161331 transitions. Word has length 39 [2021-07-13 20:30:13,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:13,695 INFO L482 AbstractCegarLoop]: Abstraction has 38976 states and 161331 transitions. [2021-07-13 20:30:13,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 38976 states and 161331 transitions. [2021-07-13 20:30:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:13,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:13,795 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:13,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:13,995 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:13,996 INFO L82 PathProgramCache]: Analyzing trace with hash -560742591, now seen corresponding path program 60 times [2021-07-13 20:30:13,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:13,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449330442] [2021-07-13 20:30:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:14,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449330442] [2021-07-13 20:30:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449330442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846792406] [2021-07-13 20:30:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:14,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:30:14,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:14,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 20:30:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:14,591 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:14,591 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 28 treesize of output 16 [2021-07-13 20:30:14,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,607 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-07-13 20:30:14,639 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 30 treesize of output 22 [2021-07-13 20:30:14,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:14,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:30:14,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,920 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 16 [2021-07-13 20:30:14,921 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:14,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:14,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:14,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:30:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:14,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846792406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:14,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:14,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:30:14,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628289703] [2021-07-13 20:30:14,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:30:14,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:14,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:30:14,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:30:14,972 INFO L87 Difference]: Start difference. First operand 38976 states and 161331 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:17,848 INFO L93 Difference]: Finished difference Result 88281 states and 358606 transitions. [2021-07-13 20:30:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:30:17,849 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:18,277 INFO L225 Difference]: With dead ends: 88281 [2021-07-13 20:30:18,277 INFO L226 Difference]: Without dead ends: 88226 [2021-07-13 20:30:18,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1907.4ms TimeCoverageRelationStatistics Valid=526, Invalid=3014, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:30:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88226 states. [2021-07-13 20:30:20,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88226 to 38600. [2021-07-13 20:30:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38600 states, 38599 states have (on average 4.1400554418508255) internal successors, (159802), 38599 states have internal predecessors, (159802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38600 states to 38600 states and 159802 transitions. [2021-07-13 20:30:20,423 INFO L78 Accepts]: Start accepts. Automaton has 38600 states and 159802 transitions. Word has length 39 [2021-07-13 20:30:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:20,423 INFO L482 AbstractCegarLoop]: Abstraction has 38600 states and 159802 transitions. [2021-07-13 20:30:20,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 38600 states and 159802 transitions. [2021-07-13 20:30:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:20,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:20,849 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:21,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,065 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:21,065 INFO L82 PathProgramCache]: Analyzing trace with hash 807300523, now seen corresponding path program 61 times [2021-07-13 20:30:21,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:21,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172203885] [2021-07-13 20:30:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:21,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172203885] [2021-07-13 20:30:21,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172203885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250893357] [2021-07-13 20:30:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:21,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:21,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:21,693 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:21,694 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 33 treesize of output 21 [2021-07-13 20:30:21,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:21,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:21,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:30:21,736 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 35 treesize of output 27 [2021-07-13 20:30:21,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:21,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:21,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:21,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:30:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:21,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250893357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:21,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:21,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:21,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140247208] [2021-07-13 20:30:21,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:21,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:21,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:21,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:21,784 INFO L87 Difference]: Start difference. First operand 38600 states and 159802 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:22,593 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2021-07-13 20:30:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:24,064 INFO L93 Difference]: Finished difference Result 71434 states and 291667 transitions. [2021-07-13 20:30:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:30:24,064 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:24,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:24,408 INFO L225 Difference]: With dead ends: 71434 [2021-07-13 20:30:24,409 INFO L226 Difference]: Without dead ends: 71186 [2021-07-13 20:30:24,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1376.2ms TimeCoverageRelationStatistics Valid=352, Invalid=1628, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:30:24,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71186 states. [2021-07-13 20:30:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71186 to 38786. [2021-07-13 20:30:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.138249323191956) internal successors, (160502), 38785 states have internal predecessors, (160502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160502 transitions. [2021-07-13 20:30:25,963 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160502 transitions. Word has length 39 [2021-07-13 20:30:25,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:25,963 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160502 transitions. [2021-07-13 20:30:25,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:25,963 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160502 transitions. [2021-07-13 20:30:26,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:26,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:26,062 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:26,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-13 20:30:26,263 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:26,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1900909765, now seen corresponding path program 62 times [2021-07-13 20:30:26,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:26,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937848935] [2021-07-13 20:30:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:26,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:26,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937848935] [2021-07-13 20:30:26,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937848935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:26,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5463698] [2021-07-13 20:30:26,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:26,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:30:26,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:27,141 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 37 treesize of output 29 [2021-07-13 20:30:27,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:27,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:27,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:30:27,179 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:27,179 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 39 treesize of output 27 [2021-07-13 20:30:27,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:27,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:27,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:27,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:30:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:27,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5463698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:27,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:27,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:27,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925875149] [2021-07-13 20:30:27,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:27,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:27,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:27,230 INFO L87 Difference]: Start difference. First operand 38786 states and 160502 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:28,458 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-07-13 20:30:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:29,568 INFO L93 Difference]: Finished difference Result 88085 states and 358572 transitions. [2021-07-13 20:30:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:30:29,569 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:30,029 INFO L225 Difference]: With dead ends: 88085 [2021-07-13 20:30:30,029 INFO L226 Difference]: Without dead ends: 87917 [2021-07-13 20:30:30,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1591.8ms TimeCoverageRelationStatistics Valid=415, Invalid=2035, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:30:30,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87917 states. [2021-07-13 20:30:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87917 to 38764. [2021-07-13 20:30:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38764 states, 38763 states have (on average 4.1404174083533265) internal successors, (160495), 38763 states have internal predecessors, (160495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38764 states to 38764 states and 160495 transitions. [2021-07-13 20:30:31,859 INFO L78 Accepts]: Start accepts. Automaton has 38764 states and 160495 transitions. Word has length 39 [2021-07-13 20:30:31,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:31,859 INFO L482 AbstractCegarLoop]: Abstraction has 38764 states and 160495 transitions. [2021-07-13 20:30:31,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:31,860 INFO L276 IsEmpty]: Start isEmpty. Operand 38764 states and 160495 transitions. [2021-07-13 20:30:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:31,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:31,959 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:32,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:32,161 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 374060779, now seen corresponding path program 63 times [2021-07-13 20:30:32,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:32,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42017532] [2021-07-13 20:30:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:32,602 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-13 20:30:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:32,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:32,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42017532] [2021-07-13 20:30:32,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42017532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:32,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135259259] [2021-07-13 20:30:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:32,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:30:32,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:32,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:30:32,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:33,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:33,380 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 39 treesize of output 55 [2021-07-13 20:30:33,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:33,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:33,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:146 [2021-07-13 20:30:33,707 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:33,707 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 39 treesize of output 47 [2021-07-13 20:30:33,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:33,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 57 [2021-07-13 20:30:33,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,776 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:33,777 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 39 treesize of output 47 [2021-07-13 20:30:33,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:33,792 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 26 treesize of output 28 [2021-07-13 20:30:33,793 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:33,811 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:33,811 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 26 treesize of output 24 [2021-07-13 20:30:33,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,830 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:30:33,830 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 52 treesize of output 1 [2021-07-13 20:30:33,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,865 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:33,865 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 52 treesize of output 56 [2021-07-13 20:30:33,867 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:30:33,879 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:33,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 30 [2021-07-13 20:30:33,881 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,921 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-07-13 20:30:33,921 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 39 treesize of output 53 [2021-07-13 20:30:33,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,940 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:30:33,940 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 39 treesize of output 1 [2021-07-13 20:30:33,941 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,958 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-07-13 20:30:33,959 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 52 treesize of output 1 [2021-07-13 20:30:33,960 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:33,973 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:33,973 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 26 treesize of output 24 [2021-07-13 20:30:33,974 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:34,364 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 20:30:34,364 INFO L628 ElimStorePlain]: treesize reduction 119, result has 71.3 percent of original size [2021-07-13 20:30:34,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 20:30:34,374 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 3 variables, input treesize:723, output treesize:201 [2021-07-13 20:30:34,537 INFO L446 ElimStorePlain]: Different costs {1=[q1, v_prenex_13, v_prenex_12, v_prenex_15], 3=[v_prenex_14]} [2021-07-13 20:30:34,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:34,549 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 16 [2021-07-13 20:30:34,550 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:34,735 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-07-13 20:30:34,735 INFO L628 ElimStorePlain]: treesize reduction 19, result has 93.0 percent of original size [2021-07-13 20:30:34,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:34,745 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 16 [2021-07-13 20:30:34,746 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:34,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:34,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:34,844 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 11 treesize of output 3 [2021-07-13 20:30:34,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:34,992 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-07-13 20:30:34,992 INFO L628 ElimStorePlain]: treesize reduction 48, result has 80.0 percent of original size [2021-07-13 20:30:35,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:35,002 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 16 [2021-07-13 20:30:35,003 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:35,128 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:30:35,129 INFO L628 ElimStorePlain]: treesize reduction 26, result has 86.4 percent of original size [2021-07-13 20:30:35,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:35,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:35,145 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 23 treesize of output 29 [2021-07-13 20:30:35,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:35,153 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 11 treesize of output 3 [2021-07-13 20:30:35,154 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:35,247 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.2 percent of original size [2021-07-13 20:30:35,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:30:35,250 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:272, output treesize:111 [2021-07-13 20:30:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:35,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135259259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:35,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:35,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2021-07-13 20:30:35,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838699205] [2021-07-13 20:30:35,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 20:30:35,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 20:30:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 20:30:35,510 INFO L87 Difference]: Start difference. First operand 38764 states and 160495 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:36,610 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 53 [2021-07-13 20:30:37,887 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2021-07-13 20:30:38,341 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-07-13 20:30:38,532 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-07-13 20:30:38,962 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2021-07-13 20:30:39,219 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-13 20:30:39,473 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 69 [2021-07-13 20:30:39,718 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2021-07-13 20:30:40,284 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2021-07-13 20:30:40,592 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-07-13 20:30:41,496 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-13 20:30:42,175 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2021-07-13 20:30:42,719 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2021-07-13 20:30:43,057 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 86 [2021-07-13 20:30:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:43,980 INFO L93 Difference]: Finished difference Result 74404 states and 301069 transitions. [2021-07-13 20:30:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:30:43,980 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:43,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:44,298 INFO L225 Difference]: With dead ends: 74404 [2021-07-13 20:30:44,298 INFO L226 Difference]: Without dead ends: 74256 [2021-07-13 20:30:44,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3203 ImplicationChecksByTransitivity, 7245.4ms TimeCoverageRelationStatistics Valid=1652, Invalid=8248, Unknown=0, NotChecked=0, Total=9900 [2021-07-13 20:30:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74256 states. [2021-07-13 20:30:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74256 to 38786. [2021-07-13 20:30:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38786 states, 38785 states have (on average 4.140234626788707) internal successors, (160579), 38785 states have internal predecessors, (160579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38786 states to 38786 states and 160579 transitions. [2021-07-13 20:30:46,038 INFO L78 Accepts]: Start accepts. Automaton has 38786 states and 160579 transitions. Word has length 39 [2021-07-13 20:30:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:46,038 INFO L482 AbstractCegarLoop]: Abstraction has 38786 states and 160579 transitions. [2021-07-13 20:30:46,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38786 states and 160579 transitions. [2021-07-13 20:30:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:46,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:46,163 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:46,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:46,379 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:46,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:46,379 INFO L82 PathProgramCache]: Analyzing trace with hash -103766079, now seen corresponding path program 64 times [2021-07-13 20:30:46,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:46,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524608122] [2021-07-13 20:30:46,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:46,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:46,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524608122] [2021-07-13 20:30:46,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524608122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:46,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523914039] [2021-07-13 20:30:46,736 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:46,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:30:46,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:46,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:30:46,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:47,023 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 37 treesize of output 29 [2021-07-13 20:30:47,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:47,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:30:47,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:30:47,063 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 39 treesize of output 27 [2021-07-13 20:30:47,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:47,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:30:47,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:30:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:47,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523914039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:47,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:47,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:30:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146664228] [2021-07-13 20:30:47,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:30:47,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:47,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:30:47,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:30:47,113 INFO L87 Difference]: Start difference. First operand 38786 states and 160579 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:49,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:49,807 INFO L93 Difference]: Finished difference Result 87653 states and 356978 transitions. [2021-07-13 20:30:49,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 20:30:49,808 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:49,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:50,471 INFO L225 Difference]: With dead ends: 87653 [2021-07-13 20:30:50,471 INFO L226 Difference]: Without dead ends: 87571 [2021-07-13 20:30:50,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1348.1ms TimeCoverageRelationStatistics Valid=411, Invalid=2241, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:30:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87571 states. [2021-07-13 20:30:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87571 to 38508. [2021-07-13 20:30:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38508 states, 38507 states have (on average 4.141454800425897) internal successors, (159475), 38507 states have internal predecessors, (159475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:52,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38508 states to 38508 states and 159475 transitions. [2021-07-13 20:30:52,171 INFO L78 Accepts]: Start accepts. Automaton has 38508 states and 159475 transitions. Word has length 39 [2021-07-13 20:30:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:30:52,171 INFO L482 AbstractCegarLoop]: Abstraction has 38508 states and 159475 transitions. [2021-07-13 20:30:52,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 38508 states and 159475 transitions. [2021-07-13 20:30:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:30:52,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:30:52,262 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:30:52,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-07-13 20:30:52,463 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:30:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:30:52,463 INFO L82 PathProgramCache]: Analyzing trace with hash -335385293, now seen corresponding path program 65 times [2021-07-13 20:30:52,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:30:52,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648029265] [2021-07-13 20:30:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:30:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:30:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:52,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:30:52,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648029265] [2021-07-13 20:30:52,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648029265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:52,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423753296] [2021-07-13 20:30:52,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:30:52,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:30:52,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:30:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:30:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:30:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,332 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 39 treesize of output 47 [2021-07-13 20:30:53,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:30:53,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:58, output treesize:108 [2021-07-13 20:30:53,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,508 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 21 treesize of output 23 [2021-07-13 20:30:53,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:30:53,544 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,544 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 34 treesize of output 52 [2021-07-13 20:30:53,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,571 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-07-13 20:30:53,571 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 34 treesize of output 42 [2021-07-13 20:30:53,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,580 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 20:30:53,581 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 21 treesize of output 19 [2021-07-13 20:30:53,582 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:30:53,681 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.3 percent of original size [2021-07-13 20:30:53,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:30:53,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:173, output treesize:99 [2021-07-13 20:30:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:30:53,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,877 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 22 treesize of output 41 [2021-07-13 20:30:53,881 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:53,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:30:53,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:30:53,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:19 [2021-07-13 20:30:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:30:53,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423753296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:30:53,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:30:53,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:30:53,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437738728] [2021-07-13 20:30:53,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:30:53,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:30:53,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:30:53,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:30:53,943 INFO L87 Difference]: Start difference. First operand 38508 states and 159475 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:30:54,938 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-07-13 20:30:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:30:59,242 INFO L93 Difference]: Finished difference Result 76510 states and 312073 transitions. [2021-07-13 20:30:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-13 20:30:59,243 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:30:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:30:59,792 INFO L225 Difference]: With dead ends: 76510 [2021-07-13 20:30:59,792 INFO L226 Difference]: Without dead ends: 76400 [2021-07-13 20:30:59,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 3355.4ms TimeCoverageRelationStatistics Valid=947, Invalid=6363, Unknown=0, NotChecked=0, Total=7310 [2021-07-13 20:30:59,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76400 states. [2021-07-13 20:31:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76400 to 39033. [2021-07-13 20:31:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39033 states, 39032 states have (on average 4.140525722484115) internal successors, (161613), 39032 states have internal predecessors, (161613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39033 states to 39033 states and 161613 transitions. [2021-07-13 20:31:01,389 INFO L78 Accepts]: Start accepts. Automaton has 39033 states and 161613 transitions. Word has length 39 [2021-07-13 20:31:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:01,389 INFO L482 AbstractCegarLoop]: Abstraction has 39033 states and 161613 transitions. [2021-07-13 20:31:01,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 39033 states and 161613 transitions. [2021-07-13 20:31:01,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:01,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:01,486 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:01,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-07-13 20:31:01,699 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:01,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:01,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1178071479, now seen corresponding path program 66 times [2021-07-13 20:31:01,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:01,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691071322] [2021-07-13 20:31:01,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:02,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:02,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691071322] [2021-07-13 20:31:02,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691071322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:02,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313564492] [2021-07-13 20:31:02,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:02,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:31:02,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:02,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:31:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:02,312 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 37 treesize of output 29 [2021-07-13 20:31:02,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:02,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:02,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:02,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:31:02,358 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:02,358 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 34 treesize of output 22 [2021-07-13 20:31:02,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:02,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:02,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:02,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:31:02,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:02,427 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 16 [2021-07-13 20:31:02,429 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:02,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:02,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:02,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:31:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:02,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313564492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:02,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:02,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:31:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022699760] [2021-07-13 20:31:02,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:31:02,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:31:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:31:02,503 INFO L87 Difference]: Start difference. First operand 39033 states and 161613 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:03,069 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-13 20:31:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:06,158 INFO L93 Difference]: Finished difference Result 98553 states and 401234 transitions. [2021-07-13 20:31:06,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 20:31:06,159 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:06,693 INFO L225 Difference]: With dead ends: 98553 [2021-07-13 20:31:06,693 INFO L226 Difference]: Without dead ends: 98498 [2021-07-13 20:31:06,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2147.5ms TimeCoverageRelationStatistics Valid=686, Invalid=3604, Unknown=0, NotChecked=0, Total=4290 [2021-07-13 20:31:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98498 states. [2021-07-13 20:31:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98498 to 38951. [2021-07-13 20:31:08,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38951 states, 38950 states have (on average 4.142028241335045) internal successors, (161332), 38950 states have internal predecessors, (161332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:08,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38951 states to 38951 states and 161332 transitions. [2021-07-13 20:31:08,849 INFO L78 Accepts]: Start accepts. Automaton has 38951 states and 161332 transitions. Word has length 39 [2021-07-13 20:31:08,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:08,850 INFO L482 AbstractCegarLoop]: Abstraction has 38951 states and 161332 transitions. [2021-07-13 20:31:08,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38951 states and 161332 transitions. [2021-07-13 20:31:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:08,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:08,973 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:09,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:09,174 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1021356079, now seen corresponding path program 67 times [2021-07-13 20:31:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:09,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566862306] [2021-07-13 20:31:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:09,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566862306] [2021-07-13 20:31:09,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566862306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:09,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503830078] [2021-07-13 20:31:09,452 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 [2021-07-13 20:31:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:09,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:09,670 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 37 treesize of output 29 [2021-07-13 20:31:09,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:09,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:09,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:09,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:31:09,733 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:09,733 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 39 treesize of output 27 [2021-07-13 20:31:09,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:09,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:09,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:09,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:31:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:09,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503830078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:09,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:09,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:31:09,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342281488] [2021-07-13 20:31:09,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:09,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:09,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:09,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:09,781 INFO L87 Difference]: Start difference. First operand 38951 states and 161332 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:11,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:11,823 INFO L93 Difference]: Finished difference Result 80550 states and 330912 transitions. [2021-07-13 20:31:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:31:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:12,169 INFO L225 Difference]: With dead ends: 80550 [2021-07-13 20:31:12,169 INFO L226 Difference]: Without dead ends: 80495 [2021-07-13 20:31:12,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:31:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80495 states. [2021-07-13 20:31:13,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80495 to 39901. [2021-07-13 20:31:13,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39901 states, 39900 states have (on average 4.144611528822055) internal successors, (165370), 39900 states have internal predecessors, (165370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:13,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39901 states to 39901 states and 165370 transitions. [2021-07-13 20:31:13,789 INFO L78 Accepts]: Start accepts. Automaton has 39901 states and 165370 transitions. Word has length 39 [2021-07-13 20:31:13,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:13,790 INFO L482 AbstractCegarLoop]: Abstraction has 39901 states and 165370 transitions. [2021-07-13 20:31:13,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:13,790 INFO L276 IsEmpty]: Start isEmpty. Operand 39901 states and 165370 transitions. [2021-07-13 20:31:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:14,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:14,161 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:14,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:14,386 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1784259093, now seen corresponding path program 68 times [2021-07-13 20:31:14,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:14,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732560773] [2021-07-13 20:31:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:14,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:14,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732560773] [2021-07-13 20:31:14,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732560773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:14,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604505607] [2021-07-13 20:31:14,732 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 [2021-07-13 20:31:14,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:14,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:14,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:15,002 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 37 treesize of output 29 [2021-07-13 20:31:15,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:15,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:15,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:15,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:31:15,064 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:15,064 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 39 treesize of output 27 [2021-07-13 20:31:15,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:15,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:15,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:15,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:31:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:15,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604505607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:15,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:15,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:31:15,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134819103] [2021-07-13 20:31:15,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:15,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:15,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:15,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:15,111 INFO L87 Difference]: Start difference. First operand 39901 states and 165370 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:17,430 INFO L93 Difference]: Finished difference Result 77926 states and 319907 transitions. [2021-07-13 20:31:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:31:17,430 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:17,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:17,780 INFO L225 Difference]: With dead ends: 77926 [2021-07-13 20:31:17,780 INFO L226 Difference]: Without dead ends: 77871 [2021-07-13 20:31:17,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1020.2ms TimeCoverageRelationStatistics Valid=302, Invalid=1504, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:31:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77871 states. [2021-07-13 20:31:19,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77871 to 39485. [2021-07-13 20:31:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39485 states, 39484 states have (on average 4.144666193901327) internal successors, (163648), 39484 states have internal predecessors, (163648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39485 states to 39485 states and 163648 transitions. [2021-07-13 20:31:19,388 INFO L78 Accepts]: Start accepts. Automaton has 39485 states and 163648 transitions. Word has length 39 [2021-07-13 20:31:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:19,389 INFO L482 AbstractCegarLoop]: Abstraction has 39485 states and 163648 transitions. [2021-07-13 20:31:19,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 39485 states and 163648 transitions. [2021-07-13 20:31:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:19,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:19,490 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:19,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:19,690 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:19,691 INFO L82 PathProgramCache]: Analyzing trace with hash -829473297, now seen corresponding path program 69 times [2021-07-13 20:31:19,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:19,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149874021] [2021-07-13 20:31:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:20,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:20,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149874021] [2021-07-13 20:31:20,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149874021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:20,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482607654] [2021-07-13 20:31:20,404 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 [2021-07-13 20:31:20,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 20:31:20,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:20,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-13 20:31:20,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:20,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:20,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:20,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2021-07-13 20:31:20,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:20,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:20,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:20,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:106 [2021-07-13 20:31:20,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:20,969 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 37 treesize of output 45 [2021-07-13 20:31:20,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:20,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:20,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:20,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:40 [2021-07-13 20:31:21,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:21,059 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 16 [2021-07-13 20:31:21,060 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:21,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,064 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 11 treesize of output 3 [2021-07-13 20:31:21,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:21,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:21,069 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 23 treesize of output 9 [2021-07-13 20:31:21,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:21,117 INFO L628 ElimStorePlain]: treesize reduction 46, result has 50.0 percent of original size [2021-07-13 20:31:21,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:21,120 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:123, output treesize:47 [2021-07-13 20:31:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:21,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482607654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:21,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:21,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:31:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687235694] [2021-07-13 20:31:21,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:31:21,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:21,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:31:21,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:31:21,284 INFO L87 Difference]: Start difference. First operand 39485 states and 163648 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:27,151 INFO L93 Difference]: Finished difference Result 65504 states and 265768 transitions. [2021-07-13 20:31:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:31:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:27,429 INFO L225 Difference]: With dead ends: 65504 [2021-07-13 20:31:27,429 INFO L226 Difference]: Without dead ends: 65356 [2021-07-13 20:31:27,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 4641.8ms TimeCoverageRelationStatistics Valid=1000, Invalid=6832, Unknown=0, NotChecked=0, Total=7832 [2021-07-13 20:31:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65356 states. [2021-07-13 20:31:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65356 to 39869. [2021-07-13 20:31:28,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39869 states, 39868 states have (on average 4.140614026286746) internal successors, (165078), 39868 states have internal predecessors, (165078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39869 states to 39869 states and 165078 transitions. [2021-07-13 20:31:28,839 INFO L78 Accepts]: Start accepts. Automaton has 39869 states and 165078 transitions. Word has length 39 [2021-07-13 20:31:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:28,839 INFO L482 AbstractCegarLoop]: Abstraction has 39869 states and 165078 transitions. [2021-07-13 20:31:28,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 39869 states and 165078 transitions. [2021-07-13 20:31:28,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:28,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:28,941 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:29,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-07-13 20:31:29,157 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 920414259, now seen corresponding path program 70 times [2021-07-13 20:31:29,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:29,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048875036] [2021-07-13 20:31:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:29,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:29,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:29,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048875036] [2021-07-13 20:31:29,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048875036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:29,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618226393] [2021-07-13 20:31:29,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:29,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:31:29,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:29,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:30,170 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:30,170 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 33 treesize of output 21 [2021-07-13 20:31:30,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:30,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:30,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:30,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:31:30,210 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 35 treesize of output 27 [2021-07-13 20:31:30,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:30,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:30,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:30,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:31:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:30,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618226393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:30,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:30,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:31:30,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598072569] [2021-07-13 20:31:30,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:30,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:30,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:30,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:30,258 INFO L87 Difference]: Start difference. First operand 39869 states and 165078 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:33,164 INFO L93 Difference]: Finished difference Result 86144 states and 349998 transitions. [2021-07-13 20:31:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:31:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:33,551 INFO L225 Difference]: With dead ends: 86144 [2021-07-13 20:31:33,551 INFO L226 Difference]: Without dead ends: 85920 [2021-07-13 20:31:33,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1997.7ms TimeCoverageRelationStatistics Valid=478, Invalid=2714, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:31:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85920 states. [2021-07-13 20:31:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85920 to 39648. [2021-07-13 20:31:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39648 states, 39647 states have (on average 4.144626327338765) internal successors, (164322), 39647 states have internal predecessors, (164322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39648 states to 39648 states and 164322 transitions. [2021-07-13 20:31:35,630 INFO L78 Accepts]: Start accepts. Automaton has 39648 states and 164322 transitions. Word has length 39 [2021-07-13 20:31:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:35,631 INFO L482 AbstractCegarLoop]: Abstraction has 39648 states and 164322 transitions. [2021-07-13 20:31:35,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:35,631 INFO L276 IsEmpty]: Start isEmpty. Operand 39648 states and 164322 transitions. [2021-07-13 20:31:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:35,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:35,739 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:35,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-13 20:31:35,940 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1466633787, now seen corresponding path program 71 times [2021-07-13 20:31:35,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:35,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966075924] [2021-07-13 20:31:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:36,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:36,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966075924] [2021-07-13 20:31:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966075924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:36,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580987765] [2021-07-13 20:31:36,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:36,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:31:36,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:31:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:36,608 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 35 treesize of output 27 [2021-07-13 20:31:36,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:36,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:36,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:43 [2021-07-13 20:31:36,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,687 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 33 treesize of output 51 [2021-07-13 20:31:36,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:36,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:36,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:31:36,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:28 [2021-07-13 20:31:36,933 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-07-13 20:31:37,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-13 20:31:37,012 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:37,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:37,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:31:37,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:13 [2021-07-13 20:31:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:37,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580987765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:37,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:37,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:31:37,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555096766] [2021-07-13 20:31:37,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:31:37,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:37,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:31:37,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:31:37,105 INFO L87 Difference]: Start difference. First operand 39648 states and 164322 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:43,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:43,136 INFO L93 Difference]: Finished difference Result 112657 states and 457618 transitions. [2021-07-13 20:31:43,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-07-13 20:31:43,137 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:43,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:44,017 INFO L225 Difference]: With dead ends: 112657 [2021-07-13 20:31:44,018 INFO L226 Difference]: Without dead ends: 112250 [2021-07-13 20:31:44,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2616 ImplicationChecksByTransitivity, 3549.3ms TimeCoverageRelationStatistics Valid=1144, Invalid=7228, Unknown=0, NotChecked=0, Total=8372 [2021-07-13 20:31:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112250 states. [2021-07-13 20:31:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112250 to 40068. [2021-07-13 20:31:45,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40068 states, 40067 states have (on average 4.142186837047944) internal successors, (165965), 40067 states have internal predecessors, (165965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40068 states to 40068 states and 165965 transitions. [2021-07-13 20:31:46,135 INFO L78 Accepts]: Start accepts. Automaton has 40068 states and 165965 transitions. Word has length 39 [2021-07-13 20:31:46,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:46,135 INFO L482 AbstractCegarLoop]: Abstraction has 40068 states and 165965 transitions. [2021-07-13 20:31:46,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:46,135 INFO L276 IsEmpty]: Start isEmpty. Operand 40068 states and 165965 transitions. [2021-07-13 20:31:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:46,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:46,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:46,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-13 20:31:46,849 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:46,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:46,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1262713041, now seen corresponding path program 72 times [2021-07-13 20:31:46,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:46,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314526766] [2021-07-13 20:31:46,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:47,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:47,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314526766] [2021-07-13 20:31:47,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314526766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:47,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150968697] [2021-07-13 20:31:47,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:47,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:31:47,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:47,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:31:47,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:31:47,482 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 39 treesize of output 29 [2021-07-13 20:31:47,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:47,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:39 [2021-07-13 20:31:47,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:47,523 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 39 treesize of output 27 [2021-07-13 20:31:47,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:47,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:47,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:11 [2021-07-13 20:31:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:47,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150968697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:47,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:47,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:31:47,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427190977] [2021-07-13 20:31:47,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:31:47,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:47,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:31:47,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:31:47,592 INFO L87 Difference]: Start difference. First operand 40068 states and 165965 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:49,786 INFO L93 Difference]: Finished difference Result 71486 states and 291440 transitions. [2021-07-13 20:31:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:31:49,786 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:50,143 INFO L225 Difference]: With dead ends: 71486 [2021-07-13 20:31:50,144 INFO L226 Difference]: Without dead ends: 71337 [2021-07-13 20:31:50,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1189.6ms TimeCoverageRelationStatistics Valid=375, Invalid=1787, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:31:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71337 states. [2021-07-13 20:31:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71337 to 40290. [2021-07-13 20:31:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40290 states, 40289 states have (on average 4.141949415473206) internal successors, (166875), 40289 states have internal predecessors, (166875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:51,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40290 states to 40290 states and 166875 transitions. [2021-07-13 20:31:51,790 INFO L78 Accepts]: Start accepts. Automaton has 40290 states and 166875 transitions. Word has length 39 [2021-07-13 20:31:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:51,790 INFO L482 AbstractCegarLoop]: Abstraction has 40290 states and 166875 transitions. [2021-07-13 20:31:51,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 40290 states and 166875 transitions. [2021-07-13 20:31:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:51,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:51,891 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:52,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:52,092 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:52,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:52,092 INFO L82 PathProgramCache]: Analyzing trace with hash -991443623, now seen corresponding path program 73 times [2021-07-13 20:31:52,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:52,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865416776] [2021-07-13 20:31:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:52,641 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-07-13 20:31:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:52,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:52,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865416776] [2021-07-13 20:31:52,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865416776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:52,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766241099] [2021-07-13 20:31:52,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:52,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:53,098 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 37 treesize of output 29 [2021-07-13 20:31:53,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:53,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:53,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:31:53,136 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:53,137 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 39 treesize of output 27 [2021-07-13 20:31:53,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:53,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:53,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:53,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:31:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:53,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766241099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:53,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:53,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-07-13 20:31:53,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514949049] [2021-07-13 20:31:53,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 20:31:53,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:53,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 20:31:53,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 20:31:53,186 INFO L87 Difference]: Start difference. First operand 40290 states and 166875 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:54,348 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-07-13 20:31:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:31:55,661 INFO L93 Difference]: Finished difference Result 74908 states and 306273 transitions. [2021-07-13 20:31:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:31:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:31:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:31:56,036 INFO L225 Difference]: With dead ends: 74908 [2021-07-13 20:31:56,036 INFO L226 Difference]: Without dead ends: 74834 [2021-07-13 20:31:56,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1680.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1748, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:31:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74834 states. [2021-07-13 20:31:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74834 to 40210. [2021-07-13 20:31:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40210 states, 40209 states have (on average 4.1430774204780025) internal successors, (166589), 40209 states have internal predecessors, (166589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40210 states to 40210 states and 166589 transitions. [2021-07-13 20:31:57,722 INFO L78 Accepts]: Start accepts. Automaton has 40210 states and 166589 transitions. Word has length 39 [2021-07-13 20:31:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:31:57,723 INFO L482 AbstractCegarLoop]: Abstraction has 40210 states and 166589 transitions. [2021-07-13 20:31:57,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:31:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 40210 states and 166589 transitions. [2021-07-13 20:31:57,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:31:57,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:31:57,826 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:31:58,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-13 20:31:58,027 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:31:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:31:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1434492331, now seen corresponding path program 74 times [2021-07-13 20:31:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:31:58,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018797244] [2021-07-13 20:31:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:31:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:31:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:58,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:31:58,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018797244] [2021-07-13 20:31:58,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018797244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:58,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276103490] [2021-07-13 20:31:58,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:31:58,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:31:58,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:31:58,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:31:58,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:31:58,942 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 37 treesize of output 29 [2021-07-13 20:31:58,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:58,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:58,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:58,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:31:58,987 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:31:58,987 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 39 treesize of output 27 [2021-07-13 20:31:58,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:31:58,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:31:58,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:31:58,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:31:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:31:59,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276103490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:31:59,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:31:59,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:31:59,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398642635] [2021-07-13 20:31:59,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:31:59,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:31:59,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:31:59,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:31:59,036 INFO L87 Difference]: Start difference. First operand 40210 states and 166589 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:02,087 INFO L93 Difference]: Finished difference Result 104360 states and 423551 transitions. [2021-07-13 20:32:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 20:32:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:02,895 INFO L225 Difference]: With dead ends: 104360 [2021-07-13 20:32:02,895 INFO L226 Difference]: Without dead ends: 104240 [2021-07-13 20:32:02,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 1924.0ms TimeCoverageRelationStatistics Valid=586, Invalid=3074, Unknown=0, NotChecked=0, Total=3660 [2021-07-13 20:32:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104240 states. [2021-07-13 20:32:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104240 to 39614. [2021-07-13 20:32:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39614 states, 39613 states have (on average 4.146971953651579) internal successors, (164274), 39613 states have internal predecessors, (164274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39614 states to 39614 states and 164274 transitions. [2021-07-13 20:32:04,886 INFO L78 Accepts]: Start accepts. Automaton has 39614 states and 164274 transitions. Word has length 39 [2021-07-13 20:32:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:04,887 INFO L482 AbstractCegarLoop]: Abstraction has 39614 states and 164274 transitions. [2021-07-13 20:32:04,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 39614 states and 164274 transitions. [2021-07-13 20:32:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:04,982 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:04,983 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:05,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-13 20:32:05,183 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:05,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:05,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1895467137, now seen corresponding path program 75 times [2021-07-13 20:32:05,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:05,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606296576] [2021-07-13 20:32:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:05,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:05,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606296576] [2021-07-13 20:32:05,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606296576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:05,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395783749] [2021-07-13 20:32:05,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:05,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:32:05,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:32:05,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:06,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,180 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 37 treesize of output 45 [2021-07-13 20:32:06,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:06,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:06,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:61 [2021-07-13 20:32:06,480 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_20, v_prenex_18], 3=[q1]} [2021-07-13 20:32:06,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,491 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 26 treesize of output 26 [2021-07-13 20:32:06,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:32:06,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,561 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 26 treesize of output 26 [2021-07-13 20:32:06,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:32:06,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:06,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,628 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 39 treesize of output 45 [2021-07-13 20:32:06,630 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:06,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2021-07-13 20:32:06,697 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:168, output treesize:166 [2021-07-13 20:32:06,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,903 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 16 [2021-07-13 20:32:06,905 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:06,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:06,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:06,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:45 [2021-07-13 20:32:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:07,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395783749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:07,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:07,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:32:07,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677463566] [2021-07-13 20:32:07,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:32:07,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:07,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:32:07,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:32:07,029 INFO L87 Difference]: Start difference. First operand 39614 states and 164274 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:09,419 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2021-07-13 20:32:10,568 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 65 [2021-07-13 20:32:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:13,064 INFO L93 Difference]: Finished difference Result 80724 states and 325313 transitions. [2021-07-13 20:32:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-07-13 20:32:13,064 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:13,412 INFO L225 Difference]: With dead ends: 80724 [2021-07-13 20:32:13,412 INFO L226 Difference]: Without dead ends: 80450 [2021-07-13 20:32:13,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 5100.9ms TimeCoverageRelationStatistics Valid=1241, Invalid=6769, Unknown=0, NotChecked=0, Total=8010 [2021-07-13 20:32:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80450 states. [2021-07-13 20:32:15,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80450 to 39763. [2021-07-13 20:32:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39763 states, 39762 states have (on average 4.144761329912982) internal successors, (164804), 39762 states have internal predecessors, (164804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:15,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39763 states to 39763 states and 164804 transitions. [2021-07-13 20:32:15,482 INFO L78 Accepts]: Start accepts. Automaton has 39763 states and 164804 transitions. Word has length 39 [2021-07-13 20:32:15,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:15,482 INFO L482 AbstractCegarLoop]: Abstraction has 39763 states and 164804 transitions. [2021-07-13 20:32:15,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:15,483 INFO L276 IsEmpty]: Start isEmpty. Operand 39763 states and 164804 transitions. [2021-07-13 20:32:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:15,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:15,616 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:15,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 20:32:15,833 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:15,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1621561025, now seen corresponding path program 76 times [2021-07-13 20:32:15,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:15,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775551156] [2021-07-13 20:32:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:16,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:16,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775551156] [2021-07-13 20:32:16,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775551156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:16,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026403506] [2021-07-13 20:32:16,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:16,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:32:16,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:16,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:16,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:16,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:16,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:16,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:16,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:32:16,543 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:16,543 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 39 treesize of output 27 [2021-07-13 20:32:16,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:16,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:16,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:16,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:32:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:16,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026403506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:16,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:16,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:16,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3320615] [2021-07-13 20:32:16,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:16,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:16,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:16,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:16,592 INFO L87 Difference]: Start difference. First operand 39763 states and 164804 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:17,290 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-07-13 20:32:19,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:19,000 INFO L93 Difference]: Finished difference Result 94767 states and 386325 transitions. [2021-07-13 20:32:19,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:32:19,001 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:19,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:19,455 INFO L225 Difference]: With dead ends: 94767 [2021-07-13 20:32:19,455 INFO L226 Difference]: Without dead ends: 94685 [2021-07-13 20:32:19,456 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1462.6ms TimeCoverageRelationStatistics Valid=409, Invalid=2041, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:32:19,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94685 states. [2021-07-13 20:32:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94685 to 39969. [2021-07-13 20:32:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39969 states, 39968 states have (on average 4.144115292233787) internal successors, (165632), 39968 states have internal predecessors, (165632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39969 states to 39969 states and 165632 transitions. [2021-07-13 20:32:21,583 INFO L78 Accepts]: Start accepts. Automaton has 39969 states and 165632 transitions. Word has length 39 [2021-07-13 20:32:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:21,583 INFO L482 AbstractCegarLoop]: Abstraction has 39969 states and 165632 transitions. [2021-07-13 20:32:21,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 39969 states and 165632 transitions. [2021-07-13 20:32:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:21,675 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:21,675 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:21,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:21,880 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:21,880 INFO L82 PathProgramCache]: Analyzing trace with hash -32263573, now seen corresponding path program 77 times [2021-07-13 20:32:21,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:21,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554119764] [2021-07-13 20:32:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:22,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:22,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554119764] [2021-07-13 20:32:22,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554119764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:22,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110588431] [2021-07-13 20:32:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:22,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:32:22,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:22,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:32:22,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:22,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:22,881 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 39 treesize of output 47 [2021-07-13 20:32:22,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:22,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:22,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:22,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:68 [2021-07-13 20:32:23,282 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_28], 6=[q1, v_prenex_26]} [2021-07-13 20:32:23,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,300 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,300 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 30 treesize of output 42 [2021-07-13 20:32:23,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:23,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2021-07-13 20:32:23,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:32:23,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:23,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,432 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 41 treesize of output 59 [2021-07-13 20:32:23,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2021-07-13 20:32:23,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2021-07-13 20:32:23,482 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 7 variables, input treesize:181, output treesize:84 [2021-07-13 20:32:23,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2021-07-13 20:32:23,601 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:23,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:23,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:23,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:11 [2021-07-13 20:32:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:23,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110588431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:23,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:23,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:32:23,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315335083] [2021-07-13 20:32:23,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:32:23,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:32:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:32:23,667 INFO L87 Difference]: Start difference. First operand 39969 states and 165632 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:24,294 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 20:32:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:30,783 INFO L93 Difference]: Finished difference Result 111989 states and 453363 transitions. [2021-07-13 20:32:30,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-07-13 20:32:30,792 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:31,681 INFO L225 Difference]: With dead ends: 111989 [2021-07-13 20:32:31,681 INFO L226 Difference]: Without dead ends: 111570 [2021-07-13 20:32:31,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 5167.1ms TimeCoverageRelationStatistics Valid=1232, Invalid=8080, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 20:32:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111570 states. [2021-07-13 20:32:33,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111570 to 40153. [2021-07-13 20:32:33,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-13 20:32:33,712 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-13 20:32:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:33,712 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-13 20:32:33,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-13 20:32:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:33,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:33,812 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:34,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-07-13 20:32:34,013 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1810739247, now seen corresponding path program 78 times [2021-07-13 20:32:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:34,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124020297] [2021-07-13 20:32:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:34,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:34,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124020297] [2021-07-13 20:32:34,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124020297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:34,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311538646] [2021-07-13 20:32:34,694 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 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 [2021-07-13 20:32:34,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:32:34,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:34,938 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 35 treesize of output 27 [2021-07-13 20:32:34,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:34,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:34,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-07-13 20:32:34,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-13 20:32:35,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:32:35,020 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:35,021 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 30 treesize of output 38 [2021-07-13 20:32:35,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:35,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:35,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:35,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:28 [2021-07-13 20:32:35,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:35,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:32:35,121 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:35,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:35,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:32:35,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2021-07-13 20:32:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:35,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311538646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:35,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:35,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:32:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090244554] [2021-07-13 20:32:35,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:32:35,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:32:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:32:35,219 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:42,189 INFO L93 Difference]: Finished difference Result 120932 states and 494689 transitions. [2021-07-13 20:32:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-07-13 20:32:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:42,856 INFO L225 Difference]: With dead ends: 120932 [2021-07-13 20:32:42,856 INFO L226 Difference]: Without dead ends: 120663 [2021-07-13 20:32:42,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4086 ImplicationChecksByTransitivity, 5275.8ms TimeCoverageRelationStatistics Valid=1668, Invalid=9888, Unknown=0, NotChecked=0, Total=11556 [2021-07-13 20:32:43,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120663 states. [2021-07-13 20:32:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120663 to 40812. [2021-07-13 20:32:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40812 states, 40811 states have (on average 4.141922520888976) internal successors, (169036), 40811 states have internal predecessors, (169036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40812 states to 40812 states and 169036 transitions. [2021-07-13 20:32:45,435 INFO L78 Accepts]: Start accepts. Automaton has 40812 states and 169036 transitions. Word has length 39 [2021-07-13 20:32:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:45,435 INFO L482 AbstractCegarLoop]: Abstraction has 40812 states and 169036 transitions. [2021-07-13 20:32:45,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 40812 states and 169036 transitions. [2021-07-13 20:32:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:45,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:45,541 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:45,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable421,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:45,743 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1846957111, now seen corresponding path program 79 times [2021-07-13 20:32:45,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:45,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689942416] [2021-07-13 20:32:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:46,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689942416] [2021-07-13 20:32:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689942416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982984015] [2021-07-13 20:32:46,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:46,294 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 37 treesize of output 29 [2021-07-13 20:32:46,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:46,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:46,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:46,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:32:46,329 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:46,329 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 34 treesize of output 22 [2021-07-13 20:32:46,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:46,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:46,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:46,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:32:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982984015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:46,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:46,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:46,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691162310] [2021-07-13 20:32:46,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:46,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:46,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:46,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:46,618 INFO L87 Difference]: Start difference. First operand 40812 states and 169036 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:49,174 INFO L93 Difference]: Finished difference Result 93840 states and 382143 transitions. [2021-07-13 20:32:49,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:32:49,175 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:49,701 INFO L225 Difference]: With dead ends: 93840 [2021-07-13 20:32:49,701 INFO L226 Difference]: Without dead ends: 93766 [2021-07-13 20:32:49,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1194.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1973, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:32:49,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93766 states. [2021-07-13 20:32:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93766 to 40153. [2021-07-13 20:32:51,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40153 states, 40152 states have (on average 4.142757521418609) internal successors, (166340), 40152 states have internal predecessors, (166340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40153 states to 40153 states and 166340 transitions. [2021-07-13 20:32:51,527 INFO L78 Accepts]: Start accepts. Automaton has 40153 states and 166340 transitions. Word has length 39 [2021-07-13 20:32:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:51,527 INFO L482 AbstractCegarLoop]: Abstraction has 40153 states and 166340 transitions. [2021-07-13 20:32:51,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40153 states and 166340 transitions. [2021-07-13 20:32:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:51,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:51,621 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:51,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:51,822 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 247806187, now seen corresponding path program 80 times [2021-07-13 20:32:51,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:51,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144512587] [2021-07-13 20:32:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:52,218 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-07-13 20:32:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:52,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:52,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144512587] [2021-07-13 20:32:52,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144512587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:52,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359272848] [2021-07-13 20:32:52,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:52,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:32:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:32:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:32:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:32:52,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:32:52,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:52,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:52,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:52,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:30 [2021-07-13 20:32:52,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:32:52,721 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 39 treesize of output 27 [2021-07-13 20:32:52,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:32:52,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:32:52,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:32:52,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:32:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:52,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359272848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:52,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:32:52,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:32:52,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763354706] [2021-07-13 20:32:52,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:32:52,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:32:52,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:32:52,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:32:52,770 INFO L87 Difference]: Start difference. First operand 40153 states and 166340 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:55,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:32:55,918 INFO L93 Difference]: Finished difference Result 116370 states and 472671 transitions. [2021-07-13 20:32:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 20:32:55,918 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:32:55,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:32:56,836 INFO L225 Difference]: With dead ends: 116370 [2021-07-13 20:32:56,836 INFO L226 Difference]: Without dead ends: 116234 [2021-07-13 20:32:56,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1905.3ms TimeCoverageRelationStatistics Valid=533, Invalid=2889, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 20:32:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116234 states. [2021-07-13 20:32:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116234 to 39521. [2021-07-13 20:32:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39521 states, 39520 states have (on average 4.145141700404858) internal successors, (163816), 39520 states have internal predecessors, (163816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39521 states to 39521 states and 163816 transitions. [2021-07-13 20:32:59,319 INFO L78 Accepts]: Start accepts. Automaton has 39521 states and 163816 transitions. Word has length 39 [2021-07-13 20:32:59,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:32:59,319 INFO L482 AbstractCegarLoop]: Abstraction has 39521 states and 163816 transitions. [2021-07-13 20:32:59,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:32:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 39521 states and 163816 transitions. [2021-07-13 20:32:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:32:59,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:32:59,477 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:32:59,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:32:59,678 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:32:59,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:32:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2140222515, now seen corresponding path program 81 times [2021-07-13 20:32:59,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:32:59,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727475175] [2021-07-13 20:32:59,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:32:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:32:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:32:59,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:32:59,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727475175] [2021-07-13 20:32:59,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727475175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:32:59,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494677561] [2021-07-13 20:32:59,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:00,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:00,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:00,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:33:00,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:00,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:00,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:00,253 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 39 treesize of output 47 [2021-07-13 20:33:00,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:00,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:00,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:00,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:78 [2021-07-13 20:33:00,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:00,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:00,401 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 38 treesize of output 44 [2021-07-13 20:33:00,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:00,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:00,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-07-13 20:33:00,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-07-13 20:33:00,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:00,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:00,451 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 38 treesize of output 44 [2021-07-13 20:33:00,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:00,463 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:33:00,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-07-13 20:33:00,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:00,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:00,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 20:33:00,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:243, output treesize:308 [2021-07-13 20:33:00,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:00,987 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 16 [2021-07-13 20:33:00,988 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:01,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:01,018 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 11 treesize of output 3 [2021-07-13 20:33:01,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:01,055 INFO L628 ElimStorePlain]: treesize reduction 23, result has 64.1 percent of original size [2021-07-13 20:33:01,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:01,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:76, output treesize:42 [2021-07-13 20:33:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:01,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494677561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:01,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:01,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:33:01,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668103035] [2021-07-13 20:33:01,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:33:01,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:33:01,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:33:01,192 INFO L87 Difference]: Start difference. First operand 39521 states and 163816 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:04,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:04,355 INFO L93 Difference]: Finished difference Result 77354 states and 314932 transitions. [2021-07-13 20:33:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 20:33:04,356 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:04,702 INFO L225 Difference]: With dead ends: 77354 [2021-07-13 20:33:04,702 INFO L226 Difference]: Without dead ends: 77244 [2021-07-13 20:33:04,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 2553.5ms TimeCoverageRelationStatistics Valid=693, Invalid=2847, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:33:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77244 states. [2021-07-13 20:33:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77244 to 39808. [2021-07-13 20:33:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39808 states, 39807 states have (on average 4.143693320270304) internal successors, (164948), 39807 states have internal predecessors, (164948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39808 states to 39808 states and 164948 transitions. [2021-07-13 20:33:06,392 INFO L78 Accepts]: Start accepts. Automaton has 39808 states and 164948 transitions. Word has length 39 [2021-07-13 20:33:06,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:06,392 INFO L482 AbstractCegarLoop]: Abstraction has 39808 states and 164948 transitions. [2021-07-13 20:33:06,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:06,392 INFO L276 IsEmpty]: Start isEmpty. Operand 39808 states and 164948 transitions. [2021-07-13 20:33:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:06,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:06,755 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:06,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-07-13 20:33:06,973 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash 458385605, now seen corresponding path program 82 times [2021-07-13 20:33:06,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:06,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942073159] [2021-07-13 20:33:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:07,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942073159] [2021-07-13 20:33:07,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942073159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:07,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798895902] [2021-07-13 20:33:07,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:07,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:07,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:07,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:07,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:07,461 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 37 treesize of output 29 [2021-07-13 20:33:07,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:07,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:07,521 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:07,521 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 34 treesize of output 22 [2021-07-13 20:33:07,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:07,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:07,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 20:33:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:07,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798895902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:07,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:07,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:07,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809114961] [2021-07-13 20:33:07,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:07,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:07,588 INFO L87 Difference]: Start difference. First operand 39808 states and 164948 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:10,040 INFO L93 Difference]: Finished difference Result 98952 states and 404548 transitions. [2021-07-13 20:33:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 20:33:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:10,564 INFO L225 Difference]: With dead ends: 98952 [2021-07-13 20:33:10,564 INFO L226 Difference]: Without dead ends: 98897 [2021-07-13 20:33:10,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1088.1ms TimeCoverageRelationStatistics Valid=400, Invalid=1952, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:33:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98897 states. [2021-07-13 20:33:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98897 to 41626. [2021-07-13 20:33:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41626 states, 41625 states have (on average 4.144912912912913) internal successors, (172532), 41625 states have internal predecessors, (172532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41626 states to 41626 states and 172532 transitions. [2021-07-13 20:33:12,756 INFO L78 Accepts]: Start accepts. Automaton has 41626 states and 172532 transitions. Word has length 39 [2021-07-13 20:33:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:12,756 INFO L482 AbstractCegarLoop]: Abstraction has 41626 states and 172532 transitions. [2021-07-13 20:33:12,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 41626 states and 172532 transitions. [2021-07-13 20:33:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:12,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:12,862 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:13,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 20:33:13,062 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash -798003409, now seen corresponding path program 83 times [2021-07-13 20:33:13,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:13,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868202357] [2021-07-13 20:33:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:13,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:13,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:13,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868202357] [2021-07-13 20:33:13,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868202357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:13,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779719445] [2021-07-13 20:33:13,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:13,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:13,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:13,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 20:33:13,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:13,530 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 37 treesize of output 29 [2021-07-13 20:33:13,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:13,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:13,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:13,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:13,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:13,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2021-07-13 20:33:13,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:13,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:13,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:13,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:25 [2021-07-13 20:33:13,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:13,971 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 16 [2021-07-13 20:33:13,972 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:13,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:13,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:13,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:33:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:14,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779719445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:14,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:14,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:33:14,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110869576] [2021-07-13 20:33:14,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:33:14,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:14,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:33:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:33:14,030 INFO L87 Difference]: Start difference. First operand 41626 states and 172532 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:18,024 INFO L93 Difference]: Finished difference Result 86010 states and 349681 transitions. [2021-07-13 20:33:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 20:33:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:18,984 INFO L225 Difference]: With dead ends: 86010 [2021-07-13 20:33:18,984 INFO L226 Difference]: Without dead ends: 85900 [2021-07-13 20:33:18,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 2757.2ms TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2021-07-13 20:33:19,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85900 states. [2021-07-13 20:33:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85900 to 42486. [2021-07-13 20:33:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42486 states, 42485 states have (on average 4.143580087089561) internal successors, (176040), 42485 states have internal predecessors, (176040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42486 states to 42486 states and 176040 transitions. [2021-07-13 20:33:21,216 INFO L78 Accepts]: Start accepts. Automaton has 42486 states and 176040 transitions. Word has length 39 [2021-07-13 20:33:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:21,216 INFO L482 AbstractCegarLoop]: Abstraction has 42486 states and 176040 transitions. [2021-07-13 20:33:21,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:21,216 INFO L276 IsEmpty]: Start isEmpty. Operand 42486 states and 176040 transitions. [2021-07-13 20:33:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:21,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:21,329 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:21,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-07-13 20:33:21,530 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:21,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:21,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1274133635, now seen corresponding path program 84 times [2021-07-13 20:33:21,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:21,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863716111] [2021-07-13 20:33:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:21,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863716111] [2021-07-13 20:33:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863716111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618451122] [2021-07-13 20:33:21,805 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 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 [2021-07-13 20:33:21,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:33:21,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:33:21,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:21,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-07-13 20:33:22,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:22,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:22,083 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 39 treesize of output 27 [2021-07-13 20:33:22,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:22,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:22,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:33:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:22,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618451122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:22,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:22,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723652140] [2021-07-13 20:33:22,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:22,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:22,131 INFO L87 Difference]: Start difference. First operand 42486 states and 176040 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:22,471 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-07-13 20:33:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:24,979 INFO L93 Difference]: Finished difference Result 100201 states and 409486 transitions. [2021-07-13 20:33:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:33:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:25,546 INFO L225 Difference]: With dead ends: 100201 [2021-07-13 20:33:25,546 INFO L226 Difference]: Without dead ends: 100146 [2021-07-13 20:33:25,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1351.4ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:33:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100146 states. [2021-07-13 20:33:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100146 to 41898. [2021-07-13 20:33:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41898 states, 41897 states have (on average 4.146358927846863) internal successors, (173720), 41897 states have internal predecessors, (173720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41898 states to 41898 states and 173720 transitions. [2021-07-13 20:33:27,596 INFO L78 Accepts]: Start accepts. Automaton has 41898 states and 173720 transitions. Word has length 39 [2021-07-13 20:33:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:27,596 INFO L482 AbstractCegarLoop]: Abstraction has 41898 states and 173720 transitions. [2021-07-13 20:33:27,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 41898 states and 173720 transitions. [2021-07-13 20:33:28,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:28,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:28,049 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:28,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:28,249 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:28,250 INFO L82 PathProgramCache]: Analyzing trace with hash 691348715, now seen corresponding path program 85 times [2021-07-13 20:33:28,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:28,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144041605] [2021-07-13 20:33:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:28,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:28,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144041605] [2021-07-13 20:33:28,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144041605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:28,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820459124] [2021-07-13 20:33:28,516 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 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 [2021-07-13 20:33:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:28,736 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 37 treesize of output 29 [2021-07-13 20:33:28,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:28,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:28,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:28,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:28,821 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:28,821 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 39 treesize of output 27 [2021-07-13 20:33:28,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:28,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:28,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:28,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:33:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:28,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820459124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:28,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:28,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:28,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71957228] [2021-07-13 20:33:28,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:28,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:28,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:28,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:28,868 INFO L87 Difference]: Start difference. First operand 41898 states and 173720 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:31,080 INFO L93 Difference]: Finished difference Result 82479 states and 338687 transitions. [2021-07-13 20:33:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:33:31,080 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:31,503 INFO L225 Difference]: With dead ends: 82479 [2021-07-13 20:33:31,504 INFO L226 Difference]: Without dead ends: 82424 [2021-07-13 20:33:31,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 892.3ms TimeCoverageRelationStatistics Valid=337, Invalid=1385, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:33:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82424 states. [2021-07-13 20:33:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82424 to 41202. [2021-07-13 20:33:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41202 states, 41201 states have (on average 4.142520812601636) internal successors, (170676), 41201 states have internal predecessors, (170676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:33,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41202 states to 41202 states and 170676 transitions. [2021-07-13 20:33:33,319 INFO L78 Accepts]: Start accepts. Automaton has 41202 states and 170676 transitions. Word has length 39 [2021-07-13 20:33:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:33,319 INFO L482 AbstractCegarLoop]: Abstraction has 41202 states and 170676 transitions. [2021-07-13 20:33:33,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 41202 states and 170676 transitions. [2021-07-13 20:33:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:33,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:33,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:33,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-07-13 20:33:33,665 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash 983531635, now seen corresponding path program 86 times [2021-07-13 20:33:33,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:33,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178555232] [2021-07-13 20:33:33,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:34,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:34,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178555232] [2021-07-13 20:33:34,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178555232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420474643] [2021-07-13 20:33:34,250 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 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 [2021-07-13 20:33:34,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:33:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:34,445 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 37 treesize of output 29 [2021-07-13 20:33:34,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:34,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:34,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:34,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:34,529 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:34,529 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 39 treesize of output 27 [2021-07-13 20:33:34,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:34,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:34,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:34,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:33:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:34,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420474643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:34,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:34,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668113424] [2021-07-13 20:33:34,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:34,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:34,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:34,579 INFO L87 Difference]: Start difference. First operand 41202 states and 170676 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:36,548 INFO L93 Difference]: Finished difference Result 85275 states and 350117 transitions. [2021-07-13 20:33:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 20:33:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:37,259 INFO L225 Difference]: With dead ends: 85275 [2021-07-13 20:33:37,259 INFO L226 Difference]: Without dead ends: 85220 [2021-07-13 20:33:37,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1215.7ms TimeCoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:33:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85220 states. [2021-07-13 20:33:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85220 to 41643. [2021-07-13 20:33:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41643 states, 41642 states have (on average 4.147975601556121) internal successors, (172730), 41642 states have internal predecessors, (172730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41643 states to 41643 states and 172730 transitions. [2021-07-13 20:33:39,221 INFO L78 Accepts]: Start accepts. Automaton has 41643 states and 172730 transitions. Word has length 39 [2021-07-13 20:33:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:39,221 INFO L482 AbstractCegarLoop]: Abstraction has 41643 states and 172730 transitions. [2021-07-13 20:33:39,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:39,221 INFO L276 IsEmpty]: Start isEmpty. Operand 41643 states and 172730 transitions. [2021-07-13 20:33:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:39,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:39,329 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:39,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-07-13 20:33:39,533 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:39,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:39,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1822083537, now seen corresponding path program 87 times [2021-07-13 20:33:39,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:39,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020307258] [2021-07-13 20:33:39,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:40,048 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 20:33:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:40,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:40,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020307258] [2021-07-13 20:33:40,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020307258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:40,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614526777] [2021-07-13 20:33:40,054 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 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 [2021-07-13 20:33:40,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 20:33:40,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:40,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-13 20:33:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:40,275 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 41 treesize of output 33 [2021-07-13 20:33:40,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:40,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:40,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:40,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:40 [2021-07-13 20:33:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:40,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:40,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:33:40,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:40,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:40,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:33:40,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:75 [2021-07-13 20:33:40,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:40,446 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 16 [2021-07-13 20:33:40,447 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:40,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:40,470 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 11 treesize of output 5 [2021-07-13 20:33:40,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:40,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:40,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:33:40,490 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:58, output treesize:44 [2021-07-13 20:33:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:40,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614526777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:40,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:40,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:33:40,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118360581] [2021-07-13 20:33:40,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:33:40,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:40,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:33:40,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:33:40,583 INFO L87 Difference]: Start difference. First operand 41643 states and 172730 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:41,660 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-07-13 20:33:44,946 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-07-13 20:33:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:45,524 INFO L93 Difference]: Finished difference Result 98168 states and 401438 transitions. [2021-07-13 20:33:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-07-13 20:33:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:46,266 INFO L225 Difference]: With dead ends: 98168 [2021-07-13 20:33:46,266 INFO L226 Difference]: Without dead ends: 98026 [2021-07-13 20:33:46,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2668 ImplicationChecksByTransitivity, 3843.3ms TimeCoverageRelationStatistics Valid=1322, Invalid=6160, Unknown=0, NotChecked=0, Total=7482 [2021-07-13 20:33:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98026 states. [2021-07-13 20:33:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98026 to 43365. [2021-07-13 20:33:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43365 states, 43364 states have (on average 4.146642376164561) internal successors, (179815), 43364 states have internal predecessors, (179815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43365 states to 43365 states and 179815 transitions. [2021-07-13 20:33:48,411 INFO L78 Accepts]: Start accepts. Automaton has 43365 states and 179815 transitions. Word has length 39 [2021-07-13 20:33:48,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:48,412 INFO L482 AbstractCegarLoop]: Abstraction has 43365 states and 179815 transitions. [2021-07-13 20:33:48,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 43365 states and 179815 transitions. [2021-07-13 20:33:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:48,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:48,916 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:49,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:49,133 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:49,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:49,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1184812599, now seen corresponding path program 88 times [2021-07-13 20:33:49,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:49,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832705363] [2021-07-13 20:33:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:49,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832705363] [2021-07-13 20:33:49,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832705363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891462298] [2021-07-13 20:33:49,402 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 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 [2021-07-13 20:33:49,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:33:49,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:49,668 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 37 treesize of output 29 [2021-07-13 20:33:49,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:33:49,766 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:33:49,766 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 39 treesize of output 27 [2021-07-13 20:33:49,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:49,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:49,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:33:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:49,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891462298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:49,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:49,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:33:49,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9435488] [2021-07-13 20:33:49,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:33:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:49,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:33:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:33:49,813 INFO L87 Difference]: Start difference. First operand 43365 states and 179815 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:33:52,385 INFO L93 Difference]: Finished difference Result 100263 states and 410482 transitions. [2021-07-13 20:33:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 20:33:52,385 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:33:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:33:52,937 INFO L225 Difference]: With dead ends: 100263 [2021-07-13 20:33:52,937 INFO L226 Difference]: Without dead ends: 100208 [2021-07-13 20:33:52,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1136.0ms TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 20:33:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100208 states. [2021-07-13 20:33:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100208 to 41371. [2021-07-13 20:33:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41371 states, 41370 states have (on average 4.146531302876481) internal successors, (171542), 41370 states have internal predecessors, (171542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:55,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41371 states to 41371 states and 171542 transitions. [2021-07-13 20:33:55,253 INFO L78 Accepts]: Start accepts. Automaton has 41371 states and 171542 transitions. Word has length 39 [2021-07-13 20:33:55,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:33:55,253 INFO L482 AbstractCegarLoop]: Abstraction has 41371 states and 171542 transitions. [2021-07-13 20:33:55,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:33:55,253 INFO L276 IsEmpty]: Start isEmpty. Operand 41371 states and 171542 transitions. [2021-07-13 20:33:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:33:55,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:33:55,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:33:55,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:33:55,568 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:33:55,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:33:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2134546223, now seen corresponding path program 89 times [2021-07-13 20:33:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:33:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902354369] [2021-07-13 20:33:55,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:33:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:33:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:55,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:33:55,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902354369] [2021-07-13 20:33:55,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902354369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:55,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100012192] [2021-07-13 20:33:55,838 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 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 [2021-07-13 20:33:55,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 20:33:55,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:33:55,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:33:55,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:33:56,022 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 39 treesize of output 31 [2021-07-13 20:33:56,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:56,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:56,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:33:56,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:28 [2021-07-13 20:33:56,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:56,359 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 34 treesize of output 52 [2021-07-13 20:33:56,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:33:56,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:56,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:56,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:30 [2021-07-13 20:33:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:56,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:33:56,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:56,468 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 22 treesize of output 41 [2021-07-13 20:33:56,471 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:56,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:33:56,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:33:56,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:33 [2021-07-13 20:33:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:33:56,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100012192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:33:56,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:33:56,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:33:56,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597188630] [2021-07-13 20:33:56,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:33:56,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:33:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:33:56,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:33:56,569 INFO L87 Difference]: Start difference. First operand 41371 states and 171542 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:01,375 INFO L93 Difference]: Finished difference Result 111193 states and 459274 transitions. [2021-07-13 20:34:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 20:34:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:02,244 INFO L225 Difference]: With dead ends: 111193 [2021-07-13 20:34:02,245 INFO L226 Difference]: Without dead ends: 111083 [2021-07-13 20:34:02,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 3043.7ms TimeCoverageRelationStatistics Valid=1109, Invalid=5211, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 20:34:02,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111083 states. [2021-07-13 20:34:04,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111083 to 42114. [2021-07-13 20:34:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42114 states, 42113 states have (on average 4.147104219599648) internal successors, (174647), 42113 states have internal predecessors, (174647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42114 states to 42114 states and 174647 transitions. [2021-07-13 20:34:04,333 INFO L78 Accepts]: Start accepts. Automaton has 42114 states and 174647 transitions. Word has length 39 [2021-07-13 20:34:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:04,333 INFO L482 AbstractCegarLoop]: Abstraction has 42114 states and 174647 transitions. [2021-07-13 20:34:04,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 42114 states and 174647 transitions. [2021-07-13 20:34:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:04,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:04,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:04,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:04,636 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:04,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:04,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1523150135, now seen corresponding path program 90 times [2021-07-13 20:34:04,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:04,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350592485] [2021-07-13 20:34:04,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:05,068 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-07-13 20:34:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:05,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:05,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350592485] [2021-07-13 20:34:05,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350592485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:05,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318978780] [2021-07-13 20:34:05,226 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 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 [2021-07-13 20:34:05,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 20:34:05,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:05,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:34:05,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:05,415 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 37 treesize of output 29 [2021-07-13 20:34:05,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:05,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:26 [2021-07-13 20:34:05,475 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:05,475 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 34 treesize of output 22 [2021-07-13 20:34:05,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:05,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:05,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:15 [2021-07-13 20:34:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:05,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318978780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:05,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:05,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:05,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190913390] [2021-07-13 20:34:05,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:05,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:05,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:05,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:05,542 INFO L87 Difference]: Start difference. First operand 42114 states and 174647 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:08,081 INFO L93 Difference]: Finished difference Result 96972 states and 397209 transitions. [2021-07-13 20:34:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:34:08,081 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:08,563 INFO L225 Difference]: With dead ends: 96972 [2021-07-13 20:34:08,563 INFO L226 Difference]: Without dead ends: 96917 [2021-07-13 20:34:08,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1343.1ms TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 20:34:08,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96917 states. [2021-07-13 20:34:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96917 to 41581. [2021-07-13 20:34:10,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41581 states, 41580 states have (on average 4.149446849446849) internal successors, (172534), 41580 states have internal predecessors, (172534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41581 states to 41581 states and 172534 transitions. [2021-07-13 20:34:10,846 INFO L78 Accepts]: Start accepts. Automaton has 41581 states and 172534 transitions. Word has length 39 [2021-07-13 20:34:10,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:10,846 INFO L482 AbstractCegarLoop]: Abstraction has 41581 states and 172534 transitions. [2021-07-13 20:34:10,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41581 states and 172534 transitions. [2021-07-13 20:34:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:10,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:10,960 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:11,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-07-13 20:34:11,162 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:11,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1346065441, now seen corresponding path program 91 times [2021-07-13 20:34:11,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:11,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244489474] [2021-07-13 20:34:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:11,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244489474] [2021-07-13 20:34:11,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244489474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:11,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897447696] [2021-07-13 20:34:11,503 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 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 [2021-07-13 20:34:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:11,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:11,680 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:11,680 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 28 treesize of output 16 [2021-07-13 20:34:11,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:11,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:34:11,805 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 35 treesize of output 27 [2021-07-13 20:34:11,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:11,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:11,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:11,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:11,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897447696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:11,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:11,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:11,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047439097] [2021-07-13 20:34:11,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:11,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:11,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:11,853 INFO L87 Difference]: Start difference. First operand 41581 states and 172534 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:13,909 INFO L93 Difference]: Finished difference Result 70550 states and 289014 transitions. [2021-07-13 20:34:13,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 20:34:13,909 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:14,222 INFO L225 Difference]: With dead ends: 70550 [2021-07-13 20:34:14,222 INFO L226 Difference]: Without dead ends: 70358 [2021-07-13 20:34:14,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1094.4ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:34:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70358 states. [2021-07-13 20:34:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70358 to 41754. [2021-07-13 20:34:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41754 states, 41753 states have (on average 4.147246904414054) internal successors, (173160), 41753 states have internal predecessors, (173160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41754 states to 41754 states and 173160 transitions. [2021-07-13 20:34:16,001 INFO L78 Accepts]: Start accepts. Automaton has 41754 states and 173160 transitions. Word has length 39 [2021-07-13 20:34:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:16,001 INFO L482 AbstractCegarLoop]: Abstraction has 41754 states and 173160 transitions. [2021-07-13 20:34:16,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 41754 states and 173160 transitions. [2021-07-13 20:34:16,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:16,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:16,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:16,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:16,741 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1579983005, now seen corresponding path program 92 times [2021-07-13 20:34:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:16,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564631676] [2021-07-13 20:34:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:17,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:17,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564631676] [2021-07-13 20:34:17,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564631676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:17,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45780232] [2021-07-13 20:34:17,071 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 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 [2021-07-13 20:34:17,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:17,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:17,230 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:17,231 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 28 treesize of output 16 [2021-07-13 20:34:17,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:17,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:34:17,354 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 35 treesize of output 27 [2021-07-13 20:34:17,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:17,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:17,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:17,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45780232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:17,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:17,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711089765] [2021-07-13 20:34:17,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:17,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:17,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:17,402 INFO L87 Difference]: Start difference. First operand 41754 states and 173160 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:19,714 INFO L93 Difference]: Finished difference Result 71559 states and 293044 transitions. [2021-07-13 20:34:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:34:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:20,047 INFO L225 Difference]: With dead ends: 71559 [2021-07-13 20:34:20,048 INFO L226 Difference]: Without dead ends: 71343 [2021-07-13 20:34:20,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1240.2ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:34:20,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71343 states. [2021-07-13 20:34:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71343 to 41816. [2021-07-13 20:34:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41816 states, 41815 states have (on average 4.1483678105942845) internal successors, (173464), 41815 states have internal predecessors, (173464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41816 states to 41816 states and 173464 transitions. [2021-07-13 20:34:21,642 INFO L78 Accepts]: Start accepts. Automaton has 41816 states and 173464 transitions. Word has length 39 [2021-07-13 20:34:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:21,642 INFO L482 AbstractCegarLoop]: Abstraction has 41816 states and 173464 transitions. [2021-07-13 20:34:21,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 41816 states and 173464 transitions. [2021-07-13 20:34:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:21,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:21,753 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:21,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:21,953 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash 231872611, now seen corresponding path program 93 times [2021-07-13 20:34:21,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:21,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274821569] [2021-07-13 20:34:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:22,421 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-07-13 20:34:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:22,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:22,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274821569] [2021-07-13 20:34:22,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274821569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:22,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788679638] [2021-07-13 20:34:22,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:22,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:34:22,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-13 20:34:22,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:22,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:22,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2021-07-13 20:34:22,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:22,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:22,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:22,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:85 [2021-07-13 20:34:22,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:22,899 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 30 treesize of output 38 [2021-07-13 20:34:22,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:22,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:22,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:22,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:43 [2021-07-13 20:34:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:23,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:23,032 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 23 treesize of output 29 [2021-07-13 20:34:23,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:34:23,046 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:34:23,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 12 [2021-07-13 20:34:23,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:23,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:23,052 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 11 treesize of output 3 [2021-07-13 20:34:23,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:23,124 INFO L628 ElimStorePlain]: treesize reduction 36, result has 60.0 percent of original size [2021-07-13 20:34:23,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:34:23,125 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:111, output treesize:45 [2021-07-13 20:34:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:23,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788679638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:23,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:23,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-13 20:34:23,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271394680] [2021-07-13 20:34:23,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 20:34:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:23,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 20:34:23,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-07-13 20:34:23,259 INFO L87 Difference]: Start difference. First operand 41816 states and 173464 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:25,652 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-07-13 20:34:26,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:26,084 INFO L93 Difference]: Finished difference Result 69576 states and 283666 transitions. [2021-07-13 20:34:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 20:34:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:26,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:26,425 INFO L225 Difference]: With dead ends: 69576 [2021-07-13 20:34:26,426 INFO L226 Difference]: Without dead ends: 69466 [2021-07-13 20:34:26,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1996.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2638, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 20:34:26,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69466 states. [2021-07-13 20:34:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69466 to 42033. [2021-07-13 20:34:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42033 states, 42032 states have (on average 4.145365435858394) internal successors, (174238), 42032 states have internal predecessors, (174238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42033 states to 42033 states and 174238 transitions. [2021-07-13 20:34:28,322 INFO L78 Accepts]: Start accepts. Automaton has 42033 states and 174238 transitions. Word has length 39 [2021-07-13 20:34:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:28,322 INFO L482 AbstractCegarLoop]: Abstraction has 42033 states and 174238 transitions. [2021-07-13 20:34:28,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 42033 states and 174238 transitions. [2021-07-13 20:34:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:28,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:28,452 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:28,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:28,653 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1449964299, now seen corresponding path program 94 times [2021-07-13 20:34:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:28,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761196229] [2021-07-13 20:34:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:28,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:28,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761196229] [2021-07-13 20:34:28,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761196229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:28,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815417333] [2021-07-13 20:34:28,939 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 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 [2021-07-13 20:34:28,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:34:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:28,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:28,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:29,112 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:29,112 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 28 treesize of output 16 [2021-07-13 20:34:29,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:29,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:29,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:29,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-07-13 20:34:29,203 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 30 treesize of output 22 [2021-07-13 20:34:29,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:29,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:29,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:29,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:34:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:29,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815417333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:29,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:29,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:29,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100144415] [2021-07-13 20:34:29,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:29,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:29,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:29,270 INFO L87 Difference]: Start difference. First operand 42033 states and 174238 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:31,566 INFO L93 Difference]: Finished difference Result 89826 states and 367488 transitions. [2021-07-13 20:34:31,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:34:31,567 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:31,994 INFO L225 Difference]: With dead ends: 89826 [2021-07-13 20:34:31,994 INFO L226 Difference]: Without dead ends: 89771 [2021-07-13 20:34:31,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 995.1ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:34:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89771 states. [2021-07-13 20:34:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89771 to 41715. [2021-07-13 20:34:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41715 states, 41714 states have (on average 4.14752840772882) internal successors, (173010), 41714 states have internal predecessors, (173010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41715 states to 41715 states and 173010 transitions. [2021-07-13 20:34:34,142 INFO L78 Accepts]: Start accepts. Automaton has 41715 states and 173010 transitions. Word has length 39 [2021-07-13 20:34:34,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:34,142 INFO L482 AbstractCegarLoop]: Abstraction has 41715 states and 173010 transitions. [2021-07-13 20:34:34,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:34,142 INFO L276 IsEmpty]: Start isEmpty. Operand 41715 states and 173010 transitions. [2021-07-13 20:34:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:34,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:34,264 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:34,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-07-13 20:34:34,465 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash 401310577, now seen corresponding path program 95 times [2021-07-13 20:34:34,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:34,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550885968] [2021-07-13 20:34:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:34,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:34,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550885968] [2021-07-13 20:34:34,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550885968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:34,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155347591] [2021-07-13 20:34:34,792 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 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 [2021-07-13 20:34:34,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:34:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:34,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:34,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:35,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:35,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 48 [2021-07-13 20:34:35,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:34:35,045 INFO L628 ElimStorePlain]: treesize reduction 37, result has 54.3 percent of original size [2021-07-13 20:34:35,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:35,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:45 [2021-07-13 20:34:35,415 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 35 treesize of output 27 [2021-07-13 20:34:35,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:35,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:35,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:35,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:35,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155347591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:35,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:35,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:34:35,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305715284] [2021-07-13 20:34:35,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:34:35,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:35,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:34:35,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:34:35,468 INFO L87 Difference]: Start difference. First operand 41715 states and 173010 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:37,068 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2021-07-13 20:34:37,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:37,979 INFO L93 Difference]: Finished difference Result 68574 states and 280232 transitions. [2021-07-13 20:34:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 20:34:37,980 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:38,464 INFO L225 Difference]: With dead ends: 68574 [2021-07-13 20:34:38,465 INFO L226 Difference]: Without dead ends: 68446 [2021-07-13 20:34:38,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1595.5ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 20:34:38,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68446 states. [2021-07-13 20:34:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68446 to 42130. [2021-07-13 20:34:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42130 states, 42129 states have (on average 4.142562130598875) internal successors, (174522), 42129 states have internal predecessors, (174522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42130 states to 42130 states and 174522 transitions. [2021-07-13 20:34:40,103 INFO L78 Accepts]: Start accepts. Automaton has 42130 states and 174522 transitions. Word has length 39 [2021-07-13 20:34:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:40,104 INFO L482 AbstractCegarLoop]: Abstraction has 42130 states and 174522 transitions. [2021-07-13 20:34:40,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 42130 states and 174522 transitions. [2021-07-13 20:34:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:40,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:40,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:40,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable487 [2021-07-13 20:34:40,426 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash 167393013, now seen corresponding path program 96 times [2021-07-13 20:34:40,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:40,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074181193] [2021-07-13 20:34:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:40,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:40,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074181193] [2021-07-13 20:34:40,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074181193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:40,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885704480] [2021-07-13 20:34:40,741 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 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 [2021-07-13 20:34:40,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:34:40,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:40,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-13 20:34:40,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:40,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,957 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 26 treesize of output 44 [2021-07-13 20:34:40,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:40,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:40,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:40,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:43 [2021-07-13 20:34:41,374 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 35 treesize of output 27 [2021-07-13 20:34:41,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:41,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:41,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:41,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885704480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:41,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:41,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-13 20:34:41,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655650699] [2021-07-13 20:34:41,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 20:34:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 20:34:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-07-13 20:34:41,423 INFO L87 Difference]: Start difference. First operand 42130 states and 174522 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:43,819 INFO L93 Difference]: Finished difference Result 69626 states and 284381 transitions. [2021-07-13 20:34:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 20:34:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:44,339 INFO L225 Difference]: With dead ends: 69626 [2021-07-13 20:34:44,339 INFO L226 Difference]: Without dead ends: 69498 [2021-07-13 20:34:44,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1790.8ms TimeCoverageRelationStatistics Valid=435, Invalid=2427, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 20:34:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69498 states. [2021-07-13 20:34:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69498 to 42280. [2021-07-13 20:34:45,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42280 states, 42279 states have (on average 4.141772511175761) internal successors, (175110), 42279 states have internal predecessors, (175110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42280 states to 42280 states and 175110 transitions. [2021-07-13 20:34:45,999 INFO L78 Accepts]: Start accepts. Automaton has 42280 states and 175110 transitions. Word has length 39 [2021-07-13 20:34:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:46,000 INFO L482 AbstractCegarLoop]: Abstraction has 42280 states and 175110 transitions. [2021-07-13 20:34:46,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 27 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 42280 states and 175110 transitions. [2021-07-13 20:34:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:46,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:46,108 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:46,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:46,309 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1979248629, now seen corresponding path program 97 times [2021-07-13 20:34:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:46,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130523275] [2021-07-13 20:34:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:46,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:46,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130523275] [2021-07-13 20:34:46,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130523275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:46,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60113340] [2021-07-13 20:34:46,600 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 [2021-07-13 20:34:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:46,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:46,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:46,787 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:46,787 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 28 treesize of output 16 [2021-07-13 20:34:46,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:34:46,859 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 30 treesize of output 22 [2021-07-13 20:34:46,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:46,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:46,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:12 [2021-07-13 20:34:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:46,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60113340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:46,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:46,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:46,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693292758] [2021-07-13 20:34:46,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:46,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:46,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:46,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:46,927 INFO L87 Difference]: Start difference. First operand 42280 states and 175110 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:47,308 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2021-07-13 20:34:48,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:48,866 INFO L93 Difference]: Finished difference Result 75888 states and 312435 transitions. [2021-07-13 20:34:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 20:34:48,866 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:49,212 INFO L225 Difference]: With dead ends: 75888 [2021-07-13 20:34:49,212 INFO L226 Difference]: Without dead ends: 75833 [2021-07-13 20:34:49,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1122.0ms TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 20:34:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75833 states. [2021-07-13 20:34:50,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75833 to 42258. [2021-07-13 20:34:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42258 states, 42257 states have (on average 4.142248621530161) internal successors, (175039), 42257 states have internal predecessors, (175039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42258 states to 42258 states and 175039 transitions. [2021-07-13 20:34:50,823 INFO L78 Accepts]: Start accepts. Automaton has 42258 states and 175039 transitions. Word has length 39 [2021-07-13 20:34:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:50,823 INFO L482 AbstractCegarLoop]: Abstraction has 42258 states and 175039 transitions. [2021-07-13 20:34:50,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 42258 states and 175039 transitions. [2021-07-13 20:34:51,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:51,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:51,276 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:51,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:34:51,476 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:51,477 INFO L82 PathProgramCache]: Analyzing trace with hash 210357187, now seen corresponding path program 98 times [2021-07-13 20:34:51,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:51,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745732160] [2021-07-13 20:34:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:51,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:51,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745732160] [2021-07-13 20:34:51,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745732160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:51,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281505663] [2021-07-13 20:34:51,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 20:34:51,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:34:51,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:51,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:51,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:52,018 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:34:52,018 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 28 treesize of output 16 [2021-07-13 20:34:52,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-07-13 20:34:52,122 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 35 treesize of output 27 [2021-07-13 20:34:52,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:52,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:52,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:34:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:52,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281505663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:52,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:52,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:34:52,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740991269] [2021-07-13 20:34:52,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:34:52,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:52,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:34:52,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:34:52,169 INFO L87 Difference]: Start difference. First operand 42258 states and 175039 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:34:54,556 INFO L93 Difference]: Finished difference Result 85721 states and 348629 transitions. [2021-07-13 20:34:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:34:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:34:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:34:54,947 INFO L225 Difference]: With dead ends: 85721 [2021-07-13 20:34:54,947 INFO L226 Difference]: Without dead ends: 85537 [2021-07-13 20:34:54,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1172.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1797, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:34:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85537 states. [2021-07-13 20:34:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85537 to 42230. [2021-07-13 20:34:56,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42230 states, 42229 states have (on average 4.142769187051552) internal successors, (174945), 42229 states have internal predecessors, (174945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:57,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42230 states to 42230 states and 174945 transitions. [2021-07-13 20:34:57,042 INFO L78 Accepts]: Start accepts. Automaton has 42230 states and 174945 transitions. Word has length 39 [2021-07-13 20:34:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:34:57,042 INFO L482 AbstractCegarLoop]: Abstraction has 42230 states and 174945 transitions. [2021-07-13 20:34:57,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:34:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 42230 states and 174945 transitions. [2021-07-13 20:34:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:34:57,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:34:57,151 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:34:57,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-13 20:34:57,352 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:34:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:34:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash -912760441, now seen corresponding path program 99 times [2021-07-13 20:34:57,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:34:57,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176371406] [2021-07-13 20:34:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:34:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:34:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:57,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:34:57,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176371406] [2021-07-13 20:34:57,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176371406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:57,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400341476] [2021-07-13 20:34:57,697 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 [2021-07-13 20:34:57,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:34:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:34:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:34:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:34:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:34:57,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:57,901 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 30 treesize of output 36 [2021-07-13 20:34:57,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:57,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:57,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:57,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:88 [2021-07-13 20:34:58,067 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 33 treesize of output 25 [2021-07-13 20:34:58,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:34:58,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:58,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:34:58,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:9 [2021-07-13 20:34:58,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:58,102 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 16 [2021-07-13 20:34:58,103 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:58,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:34:58,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:34:58,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:34:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:34:58,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400341476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:34:58,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:34:58,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:34:58,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249435623] [2021-07-13 20:34:58,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:34:58,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:34:58,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:34:58,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:34:58,160 INFO L87 Difference]: Start difference. First operand 42230 states and 174945 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:00,062 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 20:35:01,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:01,991 INFO L93 Difference]: Finished difference Result 89279 states and 362432 transitions. [2021-07-13 20:35:01,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 20:35:01,992 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:01,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:02,610 INFO L225 Difference]: With dead ends: 89279 [2021-07-13 20:35:02,610 INFO L226 Difference]: Without dead ends: 88857 [2021-07-13 20:35:02,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 2330.4ms TimeCoverageRelationStatistics Valid=747, Invalid=4083, Unknown=0, NotChecked=0, Total=4830 [2021-07-13 20:35:02,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88857 states. [2021-07-13 20:35:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88857 to 41749. [2021-07-13 20:35:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-13 20:35:04,368 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-13 20:35:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:04,368 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-13 20:35:04,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:04,368 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-13 20:35:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:04,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:04,468 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:04,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-07-13 20:35:04,669 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:04,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:04,669 INFO L82 PathProgramCache]: Analyzing trace with hash -6081193, now seen corresponding path program 100 times [2021-07-13 20:35:04,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:04,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553227477] [2021-07-13 20:35:04,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:04,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:04,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553227477] [2021-07-13 20:35:04,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553227477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288550870] [2021-07-13 20:35:04,986 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 [2021-07-13 20:35:05,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:05,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:35:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:05,217 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:05,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-07-13 20:35:05,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-07-13 20:35:05,486 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-13 20:35:05,531 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 35 treesize of output 27 [2021-07-13 20:35:05,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:05,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:05,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:35:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:05,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288550870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:05,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:05,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:35:05,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557239480] [2021-07-13 20:35:05,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:35:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:05,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:35:05,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:05,578 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:07,547 INFO L93 Difference]: Finished difference Result 70246 states and 287846 transitions. [2021-07-13 20:35:07,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 20:35:07,547 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:07,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:07,980 INFO L225 Difference]: With dead ends: 70246 [2021-07-13 20:35:07,981 INFO L226 Difference]: Without dead ends: 70054 [2021-07-13 20:35:07,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1037.8ms TimeCoverageRelationStatistics Valid=311, Invalid=1411, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 20:35:08,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70054 states. [2021-07-13 20:35:09,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70054 to 41773. [2021-07-13 20:35:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41773 states, 41772 states have (on average 4.147036292253184) internal successors, (173230), 41772 states have internal predecessors, (173230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41773 states to 41773 states and 173230 transitions. [2021-07-13 20:35:09,553 INFO L78 Accepts]: Start accepts. Automaton has 41773 states and 173230 transitions. Word has length 39 [2021-07-13 20:35:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:09,553 INFO L482 AbstractCegarLoop]: Abstraction has 41773 states and 173230 transitions. [2021-07-13 20:35:09,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 41773 states and 173230 transitions. [2021-07-13 20:35:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:09,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:09,657 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:09,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-13 20:35:09,858 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2143700845, now seen corresponding path program 101 times [2021-07-13 20:35:09,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:09,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378916994] [2021-07-13 20:35:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:10,266 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-07-13 20:35:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:10,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:10,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378916994] [2021-07-13 20:35:10,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378916994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:10,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71819726] [2021-07-13 20:35:10,519 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 [2021-07-13 20:35:10,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 20:35:10,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:10,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 46 conjunts are in the unsatisfiable core [2021-07-13 20:35:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:10,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:10,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:10,884 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 35 treesize of output 53 [2021-07-13 20:35:10,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:35:10,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:10,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:10,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:54 [2021-07-13 20:35:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:11,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:35:11,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:11,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:11,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:27 [2021-07-13 20:35:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:11,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,173 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 20 treesize of output 39 [2021-07-13 20:35:11,176 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:11,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:11,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:11,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-07-13 20:35:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:11,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71819726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:11,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:11,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:35:11,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74944912] [2021-07-13 20:35:11,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:35:11,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:35:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:11,248 INFO L87 Difference]: Start difference. First operand 41773 states and 173230 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:11,942 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-07-13 20:35:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:15,861 INFO L93 Difference]: Finished difference Result 76909 states and 314617 transitions. [2021-07-13 20:35:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-13 20:35:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:16,198 INFO L225 Difference]: With dead ends: 76909 [2021-07-13 20:35:16,198 INFO L226 Difference]: Without dead ends: 76688 [2021-07-13 20:35:16,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 3596.1ms TimeCoverageRelationStatistics Valid=813, Invalid=4887, Unknown=0, NotChecked=0, Total=5700 [2021-07-13 20:35:16,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76688 states. [2021-07-13 20:35:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76688 to 42250. [2021-07-13 20:35:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42250 states, 42249 states have (on average 4.141447134843428) internal successors, (174972), 42249 states have internal predecessors, (174972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42250 states to 42250 states and 174972 transitions. [2021-07-13 20:35:17,772 INFO L78 Accepts]: Start accepts. Automaton has 42250 states and 174972 transitions. Word has length 39 [2021-07-13 20:35:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:17,772 INFO L482 AbstractCegarLoop]: Abstraction has 42250 states and 174972 transitions. [2021-07-13 20:35:17,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 42250 states and 174972 transitions. [2021-07-13 20:35:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:18,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:18,226 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:18,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:18,441 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2053917695, now seen corresponding path program 102 times [2021-07-13 20:35:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:18,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726600147] [2021-07-13 20:35:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:18,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:18,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:18,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726600147] [2021-07-13 20:35:18,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726600147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:18,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929236954] [2021-07-13 20:35:18,901 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 [2021-07-13 20:35:18,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 20:35:18,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:18,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-13 20:35:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:19,164 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:19,164 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 33 treesize of output 21 [2021-07-13 20:35:19,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:19,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:35:19,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-07-13 20:35:19,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:19,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:19,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:35:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:19,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929236954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:19,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:19,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:35:19,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288622536] [2021-07-13 20:35:19,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:35:19,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:35:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:19,253 INFO L87 Difference]: Start difference. First operand 42250 states and 174972 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:19,999 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-07-13 20:35:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:21,620 INFO L93 Difference]: Finished difference Result 85820 states and 348935 transitions. [2021-07-13 20:35:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:35:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:22,004 INFO L225 Difference]: With dead ends: 85820 [2021-07-13 20:35:22,004 INFO L226 Difference]: Without dead ends: 85596 [2021-07-13 20:35:22,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1530.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 20:35:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85596 states. [2021-07-13 20:35:23,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85596 to 41959. [2021-07-13 20:35:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41959 states, 41958 states have (on average 4.145335812002479) internal successors, (173930), 41958 states have internal predecessors, (173930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41959 states to 41959 states and 173930 transitions. [2021-07-13 20:35:24,062 INFO L78 Accepts]: Start accepts. Automaton has 41959 states and 173930 transitions. Word has length 39 [2021-07-13 20:35:24,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:24,062 INFO L482 AbstractCegarLoop]: Abstraction has 41959 states and 173930 transitions. [2021-07-13 20:35:24,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:24,062 INFO L276 IsEmpty]: Start isEmpty. Operand 41959 states and 173930 transitions. [2021-07-13 20:35:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:24,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:24,169 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:24,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-13 20:35:24,371 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:24,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1820000131, now seen corresponding path program 103 times [2021-07-13 20:35:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:24,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439548364] [2021-07-13 20:35:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:24,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439548364] [2021-07-13 20:35:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439548364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18699126] [2021-07-13 20:35:24,708 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 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 [2021-07-13 20:35:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:35:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:24,966 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 37 treesize of output 29 [2021-07-13 20:35:24,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:24,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:24,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:35:25,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:25,006 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 39 treesize of output 27 [2021-07-13 20:35:25,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:25,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:25,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:35:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:25,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18699126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:25,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:25,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:35:25,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861044617] [2021-07-13 20:35:25,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:35:25,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:25,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:35:25,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:25,055 INFO L87 Difference]: Start difference. First operand 41959 states and 173930 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:27,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:27,296 INFO L93 Difference]: Finished difference Result 87518 states and 356426 transitions. [2021-07-13 20:35:27,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 20:35:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:27,927 INFO L225 Difference]: With dead ends: 87518 [2021-07-13 20:35:27,928 INFO L226 Difference]: Without dead ends: 87366 [2021-07-13 20:35:27,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1126.5ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 20:35:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87366 states. [2021-07-13 20:35:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87366 to 42029. [2021-07-13 20:35:29,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42029 states, 42028 states have (on average 4.146045493480536) internal successors, (174250), 42028 states have internal predecessors, (174250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42029 states to 42029 states and 174250 transitions. [2021-07-13 20:35:29,669 INFO L78 Accepts]: Start accepts. Automaton has 42029 states and 174250 transitions. Word has length 39 [2021-07-13 20:35:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:29,669 INFO L482 AbstractCegarLoop]: Abstraction has 42029 states and 174250 transitions. [2021-07-13 20:35:29,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:29,669 INFO L276 IsEmpty]: Start isEmpty. Operand 42029 states and 174250 transitions. [2021-07-13 20:35:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:29,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:29,769 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:29,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-13 20:35:29,970 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920877, now seen corresponding path program 104 times [2021-07-13 20:35:29,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:29,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25458570] [2021-07-13 20:35:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:30,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25458570] [2021-07-13 20:35:30,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25458570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:30,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861732018] [2021-07-13 20:35:30,329 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 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 [2021-07-13 20:35:30,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:35:30,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:35:30,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:30,761 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 20:35:30,838 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 37 treesize of output 29 [2021-07-13 20:35:30,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:30,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:30,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:30,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:35:30,877 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:30,877 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 39 treesize of output 27 [2021-07-13 20:35:30,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:30,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:30,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:30,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:35:30,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:30,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861732018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:30,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:30,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:35:30,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351225220] [2021-07-13 20:35:30,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:35:30,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:30,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:35:30,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:30,927 INFO L87 Difference]: Start difference. First operand 42029 states and 174250 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:32,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:32,677 INFO L93 Difference]: Finished difference Result 73916 states and 302379 transitions. [2021-07-13 20:35:32,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 20:35:32,677 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:32,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:32,984 INFO L225 Difference]: With dead ends: 73916 [2021-07-13 20:35:32,984 INFO L226 Difference]: Without dead ends: 73826 [2021-07-13 20:35:32,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 983.2ms TimeCoverageRelationStatistics Valid=272, Invalid=1210, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 20:35:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73826 states. [2021-07-13 20:35:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73826 to 41749. [2021-07-13 20:35:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41749 states, 41748 states have (on average 4.147408259078279) internal successors, (173146), 41748 states have internal predecessors, (173146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41749 states to 41749 states and 173146 transitions. [2021-07-13 20:35:34,843 INFO L78 Accepts]: Start accepts. Automaton has 41749 states and 173146 transitions. Word has length 39 [2021-07-13 20:35:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:34,843 INFO L482 AbstractCegarLoop]: Abstraction has 41749 states and 173146 transitions. [2021-07-13 20:35:34,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:34,843 INFO L276 IsEmpty]: Start isEmpty. Operand 41749 states and 173146 transitions. [2021-07-13 20:35:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:34,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:34,955 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:35,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-07-13 20:35:35,156 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2097565101, now seen corresponding path program 105 times [2021-07-13 20:35:35,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:35,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738031844] [2021-07-13 20:35:35,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:35,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:35,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738031844] [2021-07-13 20:35:35,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738031844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:35,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337824118] [2021-07-13 20:35:35,550 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 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 [2021-07-13 20:35:35,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 20:35:35,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:35,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-13 20:35:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:35,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:35,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:35,876 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 30 treesize of output 36 [2021-07-13 20:35:35,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:35,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:35,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:35,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:87 [2021-07-13 20:35:36,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:36,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 41 [2021-07-13 20:35:36,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:36,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:36,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:36,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2021-07-13 20:35:36,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:36,135 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 16 [2021-07-13 20:35:36,137 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:36,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:36,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:36,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:47 [2021-07-13 20:35:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:36,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337824118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:36,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:36,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:35:36,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691599603] [2021-07-13 20:35:36,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:35:36,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:35:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:35:36,534 INFO L87 Difference]: Start difference. First operand 41749 states and 173146 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:41,949 INFO L93 Difference]: Finished difference Result 70259 states and 285004 transitions. [2021-07-13 20:35:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-07-13 20:35:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:42,251 INFO L225 Difference]: With dead ends: 70259 [2021-07-13 20:35:42,251 INFO L226 Difference]: Without dead ends: 70111 [2021-07-13 20:35:42,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2422 ImplicationChecksByTransitivity, 4489.1ms TimeCoverageRelationStatistics Valid=1005, Invalid=6651, Unknown=0, NotChecked=0, Total=7656 [2021-07-13 20:35:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70111 states. [2021-07-13 20:35:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70111 to 42185. [2021-07-13 20:35:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42185 states, 42184 states have (on average 4.144130476009861) internal successors, (174816), 42184 states have internal predecessors, (174816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42185 states to 42185 states and 174816 transitions. [2021-07-13 20:35:43,823 INFO L78 Accepts]: Start accepts. Automaton has 42185 states and 174816 transitions. Word has length 39 [2021-07-13 20:35:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:43,823 INFO L482 AbstractCegarLoop]: Abstraction has 42185 states and 174816 transitions. [2021-07-13 20:35:43,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:43,823 INFO L276 IsEmpty]: Start isEmpty. Operand 42185 states and 174816 transitions. [2021-07-13 20:35:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:44,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:44,214 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:44,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:44,414 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:44,415 INFO L82 PathProgramCache]: Analyzing trace with hash 415728191, now seen corresponding path program 106 times [2021-07-13 20:35:44,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:44,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747564938] [2021-07-13 20:35:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:44,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:44,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747564938] [2021-07-13 20:35:44,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747564938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:44,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941990435] [2021-07-13 20:35:44,745 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 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 [2021-07-13 20:35:44,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:35:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:44,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:35:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:44,965 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:44,965 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 28 treesize of output 16 [2021-07-13 20:35:44,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:44,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:44,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-07-13 20:35:45,037 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 35 treesize of output 27 [2021-07-13 20:35:45,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:45,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:45,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:45,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:35:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941990435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:45,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:45,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:35:45,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61247543] [2021-07-13 20:35:45,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:35:45,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:45,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:35:45,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:35:45,083 INFO L87 Difference]: Start difference. First operand 42185 states and 174816 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:47,480 INFO L93 Difference]: Finished difference Result 85984 states and 350132 transitions. [2021-07-13 20:35:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 20:35:47,481 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:47,897 INFO L225 Difference]: With dead ends: 85984 [2021-07-13 20:35:47,897 INFO L226 Difference]: Without dead ends: 85768 [2021-07-13 20:35:47,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1278.4ms TimeCoverageRelationStatistics Valid=424, Invalid=2228, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 20:35:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85768 states. [2021-07-13 20:35:49,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85768 to 41935. [2021-07-13 20:35:49,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41935 states, 41934 states have (on average 4.14837601945915) internal successors, (173958), 41934 states have internal predecessors, (173958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:49,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41935 states to 41935 states and 173958 transitions. [2021-07-13 20:35:49,959 INFO L78 Accepts]: Start accepts. Automaton has 41935 states and 173958 transitions. Word has length 39 [2021-07-13 20:35:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:49,959 INFO L482 AbstractCegarLoop]: Abstraction has 41935 states and 173958 transitions. [2021-07-13 20:35:49,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 41935 states and 173958 transitions. [2021-07-13 20:35:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:50,091 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:50,091 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:50,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-07-13 20:35:50,291 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -385546579, now seen corresponding path program 107 times [2021-07-13 20:35:50,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:50,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165514382] [2021-07-13 20:35:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:50,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:50,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165514382] [2021-07-13 20:35:50,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165514382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:50,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167670045] [2021-07-13 20:35:50,566 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 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 [2021-07-13 20:35:50,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 20:35:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-13 20:35:50,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:50,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:50,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:50,885 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 30 treesize of output 48 [2021-07-13 20:35:50,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-13 20:35:50,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:50,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-07-13 20:35:50,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:45 [2021-07-13 20:35:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:35:51,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:35:51,042 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 30 treesize of output 22 [2021-07-13 20:35:51,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:51,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:51,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:51,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:18 [2021-07-13 20:35:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:51,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167670045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:51,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:51,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-07-13 20:35:51,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359209032] [2021-07-13 20:35:51,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 20:35:51,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 20:35:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-07-13 20:35:51,155 INFO L87 Difference]: Start difference. First operand 41935 states and 173958 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:35:54,453 INFO L93 Difference]: Finished difference Result 67534 states and 276182 transitions. [2021-07-13 20:35:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:35:54,453 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:35:54,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:35:54,778 INFO L225 Difference]: With dead ends: 67534 [2021-07-13 20:35:54,779 INFO L226 Difference]: Without dead ends: 67424 [2021-07-13 20:35:54,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1570.1ms TimeCoverageRelationStatistics Valid=420, Invalid=2772, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 20:35:54,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67424 states. [2021-07-13 20:35:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67424 to 42487. [2021-07-13 20:35:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42487 states, 42486 states have (on average 4.143011815656922) internal successors, (176020), 42486 states have internal predecessors, (176020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42487 states to 42487 states and 176020 transitions. [2021-07-13 20:35:56,368 INFO L78 Accepts]: Start accepts. Automaton has 42487 states and 176020 transitions. Word has length 39 [2021-07-13 20:35:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:35:56,369 INFO L482 AbstractCegarLoop]: Abstraction has 42487 states and 176020 transitions. [2021-07-13 20:35:56,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:35:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 42487 states and 176020 transitions. [2021-07-13 20:35:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:35:56,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:35:56,472 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:35:56,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:35:56,672 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:35:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:35:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1112077505, now seen corresponding path program 108 times [2021-07-13 20:35:56,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:35:56,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020208039] [2021-07-13 20:35:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:35:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:35:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:56,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:35:56,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020208039] [2021-07-13 20:35:56,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020208039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:56,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503590949] [2021-07-13 20:35:56,950 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 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 [2021-07-13 20:35:56,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 20:35:56,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:35:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-13 20:35:56,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:35:57,301 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-07-13 20:35:57,398 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:35:57,398 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 28 treesize of output 16 [2021-07-13 20:35:57,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:57,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-07-13 20:35:57,437 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 30 treesize of output 22 [2021-07-13 20:35:57,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:57,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:35:57,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:21 [2021-07-13 20:35:57,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:57,520 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 16 [2021-07-13 20:35:57,521 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:57,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:35:57,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:35:57,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2021-07-13 20:35:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:35:57,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503590949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:35:57,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:35:57,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-07-13 20:35:57,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974590552] [2021-07-13 20:35:57,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 20:35:57,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:35:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 20:35:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-13 20:35:57,572 INFO L87 Difference]: Start difference. First operand 42487 states and 176020 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:00,108 INFO L93 Difference]: Finished difference Result 95986 states and 392161 transitions. [2021-07-13 20:36:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 20:36:00,108 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:36:00,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:00,589 INFO L225 Difference]: With dead ends: 95986 [2021-07-13 20:36:00,589 INFO L226 Difference]: Without dead ends: 95876 [2021-07-13 20:36:00,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 1421.3ms TimeCoverageRelationStatistics Valid=618, Invalid=2922, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:36:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95876 states. [2021-07-13 20:36:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95876 to 42654. [2021-07-13 20:36:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42654 states, 42653 states have (on average 4.144890160129417) internal successors, (176792), 42653 states have internal predecessors, (176792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42654 states to 42654 states and 176792 transitions. [2021-07-13 20:36:02,739 INFO L78 Accepts]: Start accepts. Automaton has 42654 states and 176792 transitions. Word has length 39 [2021-07-13 20:36:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:02,740 INFO L482 AbstractCegarLoop]: Abstraction has 42654 states and 176792 transitions. [2021-07-13 20:36:02,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 42654 states and 176792 transitions. [2021-07-13 20:36:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:36:02,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:02,853 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:03,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-13 20:36:03,077 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash 255965609, now seen corresponding path program 109 times [2021-07-13 20:36:03,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:03,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419724173] [2021-07-13 20:36:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:03,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:03,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:03,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419724173] [2021-07-13 20:36:03,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419724173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:03,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129293283] [2021-07-13 20:36:03,414 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 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 [2021-07-13 20:36:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:36:03,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:03,679 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:36:03,679 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 33 treesize of output 21 [2021-07-13 20:36:03,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:03,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-07-13 20:36:03,723 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 35 treesize of output 27 [2021-07-13 20:36:03,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:03,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:03,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:7 [2021-07-13 20:36:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:03,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129293283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:03,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:03,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:36:03,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429375927] [2021-07-13 20:36:03,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:36:03,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:36:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:36:03,769 INFO L87 Difference]: Start difference. First operand 42654 states and 176792 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:04,053 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-07-13 20:36:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:05,670 INFO L93 Difference]: Finished difference Result 72719 states and 297553 transitions. [2021-07-13 20:36:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:36:05,670 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:36:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:05,983 INFO L225 Difference]: With dead ends: 72719 [2021-07-13 20:36:05,983 INFO L226 Difference]: Without dead ends: 72471 [2021-07-13 20:36:05,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1276.4ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 20:36:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72471 states. [2021-07-13 20:36:07,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72471 to 42840. [2021-07-13 20:36:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42840 states, 42839 states have (on average 4.1432339690468964) internal successors, (177492), 42839 states have internal predecessors, (177492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42840 states to 42840 states and 177492 transitions. [2021-07-13 20:36:07,849 INFO L78 Accepts]: Start accepts. Automaton has 42840 states and 177492 transitions. Word has length 39 [2021-07-13 20:36:07,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:07,849 INFO L482 AbstractCegarLoop]: Abstraction has 42840 states and 177492 transitions. [2021-07-13 20:36:07,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:07,849 INFO L276 IsEmpty]: Start isEmpty. Operand 42840 states and 177492 transitions. [2021-07-13 20:36:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:36:08,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:08,000 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:08,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 20:36:08,213 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:08,213 INFO L82 PathProgramCache]: Analyzing trace with hash -381194881, now seen corresponding path program 110 times [2021-07-13 20:36:08,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:08,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977591447] [2021-07-13 20:36:08,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:08,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:08,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977591447] [2021-07-13 20:36:08,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977591447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:08,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248549534] [2021-07-13 20:36:08,584 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 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 [2021-07-13 20:36:08,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 20:36:08,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:08,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:36:08,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:08,840 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 37 treesize of output 29 [2021-07-13 20:36:08,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:36:08,878 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:36:08,878 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 39 treesize of output 27 [2021-07-13 20:36:08,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:08,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:08,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:36:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248549534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:08,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:08,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:36:08,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83547135] [2021-07-13 20:36:08,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:36:08,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:36:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:36:08,927 INFO L87 Difference]: Start difference. First operand 42840 states and 177492 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:09,610 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-07-13 20:36:11,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:11,110 INFO L93 Difference]: Finished difference Result 88928 states and 362147 transitions. [2021-07-13 20:36:11,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 20:36:11,110 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:36:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:11,514 INFO L225 Difference]: With dead ends: 88928 [2021-07-13 20:36:11,514 INFO L226 Difference]: Without dead ends: 88760 [2021-07-13 20:36:11,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1372.1ms TimeCoverageRelationStatistics Valid=356, Invalid=1806, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 20:36:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88760 states. [2021-07-13 20:36:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88760 to 42910. [2021-07-13 20:36:13,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42910 states, 42909 states have (on average 4.143932508331585) internal successors, (177812), 42909 states have internal predecessors, (177812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42910 states to 42910 states and 177812 transitions. [2021-07-13 20:36:13,640 INFO L78 Accepts]: Start accepts. Automaton has 42910 states and 177812 transitions. Word has length 39 [2021-07-13 20:36:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:13,640 INFO L482 AbstractCegarLoop]: Abstraction has 42910 states and 177812 transitions. [2021-07-13 20:36:13,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 42910 states and 177812 transitions. [2021-07-13 20:36:13,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:36:13,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:13,749 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:13,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-07-13 20:36:13,950 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash -177274135, now seen corresponding path program 111 times [2021-07-13 20:36:13,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:13,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15003424] [2021-07-13 20:36:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:14,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:14,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15003424] [2021-07-13 20:36:14,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15003424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:14,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018559067] [2021-07-13 20:36:14,264 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 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 [2021-07-13 20:36:14,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:36:14,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:14,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 20:36:14,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:14,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,620 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 41 treesize of output 49 [2021-07-13 20:36:14,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:63, output treesize:72 [2021-07-13 20:36:14,912 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-07-13 20:36:14,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,964 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 56 treesize of output 58 [2021-07-13 20:36:14,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:14,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:14,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:36:14,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:36:15,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 49 [2021-07-13 20:36:15,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,011 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-07-13 20:36:15,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-07-13 20:36:15,012 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:15,115 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-07-13 20:36:15,115 INFO L628 ElimStorePlain]: treesize reduction 61, result has 69.8 percent of original size [2021-07-13 20:36:15,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 20:36:15,123 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:257, output treesize:187 [2021-07-13 20:36:15,299 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2021-07-13 20:36:15,300 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:15,429 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-13 20:36:15,429 INFO L628 ElimStorePlain]: treesize reduction 26, result has 85.7 percent of original size [2021-07-13 20:36:15,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,438 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 16 [2021-07-13 20:36:15,439 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:15,558 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-07-13 20:36:15,558 INFO L628 ElimStorePlain]: treesize reduction 10, result has 93.5 percent of original size [2021-07-13 20:36:15,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,566 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 16 [2021-07-13 20:36:15,568 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-07-13 20:36:15,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:15,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 20:36:15,633 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:183, output treesize:150 [2021-07-13 20:36:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:15,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018559067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:15,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:15,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 20:36:15,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787357588] [2021-07-13 20:36:15,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 20:36:15,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:15,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 20:36:15,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 20:36:15,913 INFO L87 Difference]: Start difference. First operand 42910 states and 177812 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:16,710 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-07-13 20:36:18,393 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-07-13 20:36:18,874 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2021-07-13 20:36:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:36:19,599 INFO L93 Difference]: Finished difference Result 68366 states and 278091 transitions. [2021-07-13 20:36:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 20:36:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 20:36:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:36:19,924 INFO L225 Difference]: With dead ends: 68366 [2021-07-13 20:36:19,925 INFO L226 Difference]: Without dead ends: 68218 [2021-07-13 20:36:19,925 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 2673.2ms TimeCoverageRelationStatistics Valid=577, Invalid=2963, Unknown=0, NotChecked=0, Total=3540 [2021-07-13 20:36:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68218 states. [2021-07-13 20:36:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68218 to 42932. [2021-07-13 20:36:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42932 states, 42931 states have (on average 4.143765577321749) internal successors, (177896), 42931 states have internal predecessors, (177896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42932 states to 42932 states and 177896 transitions. [2021-07-13 20:36:21,488 INFO L78 Accepts]: Start accepts. Automaton has 42932 states and 177896 transitions. Word has length 39 [2021-07-13 20:36:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:36:21,488 INFO L482 AbstractCegarLoop]: Abstraction has 42932 states and 177896 transitions. [2021-07-13 20:36:21,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:36:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 42932 states and 177896 transitions. [2021-07-13 20:36:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 20:36:21,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:36:21,594 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:36:21,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:36:21,795 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:36:21,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:36:21,795 INFO L82 PathProgramCache]: Analyzing trace with hash -655100993, now seen corresponding path program 112 times [2021-07-13 20:36:21,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:36:21,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619970226] [2021-07-13 20:36:21,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:36:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:36:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:22,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:36:22,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619970226] [2021-07-13 20:36:22,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619970226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:22,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727457461] [2021-07-13 20:36:22,124 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 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 [2021-07-13 20:36:22,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 20:36:22,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:36:22,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 20:36:22,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:36:22,617 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 37 treesize of output 29 [2021-07-13 20:36:22,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:36 [2021-07-13 20:36:22,655 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 20:36:22,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2021-07-13 20:36:22,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 20:36:22,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:36:22,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:7 [2021-07-13 20:36:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:36:22,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727457461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:36:22,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:36:22,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2021-07-13 20:36:22,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522630617] [2021-07-13 20:36:22,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 20:36:22,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:36:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 20:36:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 20:36:22,704 INFO L87 Difference]: Start difference. First operand 42932 states and 177896 transitions. Second operand has 27 states, 27 states have (on average 2.5925925925925926) internal successors, (70), 26 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 20:36:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 20:36:23,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-07-13 20:36:23,880 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 20:36:23,883 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 20:36:23,884 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 20:36:23,884 INFO L202 PluginConnector]: Adding new model buffer-series-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 08:36:23 BasicIcfg [2021-07-13 20:36:23,884 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 20:36:23,885 INFO L168 Benchmark]: Toolchain (without parser) took 680845.01 ms. Allocated memory was 178.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 159.1 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-07-13 20:36:23,885 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 178.3 MB. Free memory is still 160.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:36:23,885 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.09 ms. Allocated memory is still 178.3 MB. Free memory was 159.0 MB in the beginning and 157.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:36:23,885 INFO L168 Benchmark]: Boogie Preprocessor took 15.71 ms. Allocated memory is still 178.3 MB. Free memory was 157.5 MB in the beginning and 156.6 MB in the end (delta: 946.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:36:23,885 INFO L168 Benchmark]: RCFGBuilder took 291.98 ms. Allocated memory is still 178.3 MB. Free memory was 156.5 MB in the beginning and 140.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-07-13 20:36:23,885 INFO L168 Benchmark]: TraceAbstraction took 680504.22 ms. Allocated memory was 178.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 140.4 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-07-13 20:36:23,885 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 178.3 MB. Free memory is still 160.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 28.09 ms. Allocated memory is still 178.3 MB. Free memory was 159.0 MB in the beginning and 157.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.71 ms. Allocated memory is still 178.3 MB. Free memory was 157.5 MB in the beginning and 156.6 MB in the end (delta: 946.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 291.98 ms. Allocated memory is still 178.3 MB. Free memory was 156.5 MB in the beginning and 140.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 680504.22 ms. Allocated memory was 178.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 140.4 MB in the beginning and 3.0 GB in the end (delta: -2.9 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (42932states) and FLOYD_HOARE automaton (currently 21 states, 27 states before enhancement),while ReachableStatesComputation was computing reachable states (1952 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 680407.1ms, OverallIterations: 121, TraceHistogramMax: 2, EmptinessCheckTime: 15419.0ms, AutomataDifference: 357985.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 82.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8385 SDtfs, 59227 SDslu, 94174 SDs, 0 SdLazy, 172020 SolverSat, 11942 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 89654.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8772 GetRequests, 3042 SyntacticMatches, 109 SemanticMatches, 5621 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102262 ImplicationChecksByTransitivity, 207823.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43365occurred in iteration=96, InterpolantAutomatonStates: 4247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 179265.3ms AutomataMinimizationTime, 120 MinimizatonAttempts, 4039152 StatesRemovedByMinimization, 120 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 870.8ms SsaConstructionTime, 2409.8ms SatisfiabilityAnalysisTime, 97980.1ms InterpolantComputationTime, 8733 NumberOfCodeBlocks, 8724 NumberOfCodeBlocksAsserted, 424 NumberOfCheckSat, 8499 ConstructedInterpolants, 260 QuantifiedInterpolants, 209464 SizeOfPredicates, 849 NumberOfNonLiveVariables, 12839 ConjunctsInSsa, 4298 ConjunctsInUnsatCore, 234 InterpolantComputations, 11 PerfectInterpolantSequences, 230/3718 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown