/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/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:06:02,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:06:02,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:06:02,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:06:02,689 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 [2021-07-09 18:06:02,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:06:02,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:06:02,717 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:06:02,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:06:02,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:06:02,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:06:02,720 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:06:02,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:06:02,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:06:02,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:06:02,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:06:02,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:06:02,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:06:02,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:06:02,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:06:02,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:06:02,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:06:02,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:06:02,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:06:02,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:06:02,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:06:02,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:06:02,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:06:02,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:06:02,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:06:02,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:06:02,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:06:02,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:06:02,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:06:02,730 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:06:02,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:06:02,730 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:06:02,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:06:02,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:06:02,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:06:02,989 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:06:02,993 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:06:02,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2021-07-09 18:06:02,994 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-07-09 18:06:03,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:06:03,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:06:03,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:06:03,267 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:06:03,267 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:06:03,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,285 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:06:03,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:06:03,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:06:03,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:06:03,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/1) ... [2021-07-09 18:06:03,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:06:03,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:06:03,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:06:03,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:06:03,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (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 [2021-07-09 18:06:03,377 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:06:03,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:06:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:06:03,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:06:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:06:03,378 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:06:03,378 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:06:03,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:06:03,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:06:03,379 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:06:03,586 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:06:03,587 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-09 18:06:03,587 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 18:06:03,588 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:06:03 BoogieIcfgContainer [2021-07-09 18:06:03,588 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:06:03,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:06:03,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:06:03,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:06:03,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:06:03" (1/2) ... [2021-07-09 18:06:03,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0c1142 and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:06:03, skipping insertion in model container [2021-07-09 18:06:03,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:06:03" (2/2) ... [2021-07-09 18:06:03,593 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-07-09 18:06:03,597 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:06:03,597 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:06:03,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:06:03,597 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:06:03,669 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:06:03,687 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:06:03,708 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:06:03,708 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:06:03,708 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:06:03,708 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:06:03,708 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:06:03,708 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:06:03,708 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:06:03,709 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:06:03,715 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-07-09 18:06:03,724 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-07-09 18:06:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2021-07-09 18:06:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 18:06:03,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:03,730 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:03,730 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:03,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-07-09 18:06:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:03,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481156387] [2021-07-09 18:06:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:03,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:03,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481156387] [2021-07-09 18:06:03,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481156387] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:06:03,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:06:03,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:06:03,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429001510] [2021-07-09 18:06:03,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:06:03,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:03,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:06:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:06:03,875 INFO L87 Difference]: Start difference. First operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:03,896 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-07-09 18:06:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:06:03,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-09 18:06:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:03,903 INFO L225 Difference]: With dead ends: 42 [2021-07-09 18:06:03,903 INFO L226 Difference]: Without dead ends: 30 [2021-07-09 18:06:03,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:06:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-07-09 18:06:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-07-09 18:06:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-07-09 18:06:03,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-07-09 18:06:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:03,940 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-07-09 18:06:03,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-07-09 18:06:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 18:06:03,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:03,941 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:03,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:06:03,941 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-07-09 18:06:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:03,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232215099] [2021-07-09 18:06:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:03,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:03,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232215099] [2021-07-09 18:06:03,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232215099] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:06:03,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:06:03,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:06:03,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840995225] [2021-07-09 18:06:03,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:06:03,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:06:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:06:03,990 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:03,996 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-07-09 18:06:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:06:03,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 18:06:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:03,997 INFO L225 Difference]: With dead ends: 32 [2021-07-09 18:06:03,997 INFO L226 Difference]: Without dead ends: 31 [2021-07-09 18:06:03,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:06:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-07-09 18:06:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-07-09 18:06:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-07-09 18:06:04,001 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-07-09 18:06:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:04,002 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-07-09 18:06:04,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-07-09 18:06:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:06:04,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:04,002 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:04,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:06:04,003 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:04,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-07-09 18:06:04,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:04,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846439140] [2021-07-09 18:06:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:04,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:04,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846439140] [2021-07-09 18:06:04,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846439140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:04,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788678767] [2021-07-09 18:06:04,063 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 [2021-07-09 18:06:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:04,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:06:04,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:04,222 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 16 treesize of output 10 [2021-07-09 18:06:04,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:04,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:04,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:04,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-07-09 18:06:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:04,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788678767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:04,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:04,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:06:04,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215431998] [2021-07-09 18:06:04,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:06:04,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:04,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:06:04,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:06:04,259 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:04,313 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-07-09 18:06:04,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:06:04,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:06:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:04,314 INFO L225 Difference]: With dead ends: 52 [2021-07-09 18:06:04,314 INFO L226 Difference]: Without dead ends: 41 [2021-07-09 18:06:04,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:06:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-09 18:06:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-07-09 18:06:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2021-07-09 18:06:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-07-09 18:06:04,318 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-07-09 18:06:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:04,318 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-07-09 18:06:04,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-07-09 18:06:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:06:04,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:04,319 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:04,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:06:04,547 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:04,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:04,548 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-07-09 18:06:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:04,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307598116] [2021-07-09 18:06:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:06:04,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:04,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307598116] [2021-07-09 18:06:04,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307598116] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:06:04,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:06:04,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:06:04,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867672100] [2021-07-09 18:06:04,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:06:04,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:04,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:06:04,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:06:04,560 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:04,568 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-07-09 18:06:04,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:06:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-09 18:06:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:04,569 INFO L225 Difference]: With dead ends: 40 [2021-07-09 18:06:04,569 INFO L226 Difference]: Without dead ends: 40 [2021-07-09 18:06:04,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:06:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-09 18:06:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-07-09 18:06:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-07-09 18:06:04,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-07-09 18:06:04,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:04,574 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-07-09 18:06:04,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,574 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-07-09 18:06:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:06:04,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:04,575 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:04,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:06:04,575 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:04,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:04,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-07-09 18:06:04,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:04,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164298638] [2021-07-09 18:06:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:04,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:04,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164298638] [2021-07-09 18:06:04,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164298638] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:06:04,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:06:04,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:06:04,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55093019] [2021-07-09 18:06:04,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:06:04,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:04,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:06:04,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:06:04,606 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:04,631 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-07-09 18:06:04,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:06:04,633 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 18:06:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:04,634 INFO L225 Difference]: With dead ends: 86 [2021-07-09 18:06:04,634 INFO L226 Difference]: Without dead ends: 84 [2021-07-09 18:06:04,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:06:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-09 18:06:04,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-07-09 18:06:04,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-07-09 18:06:04,640 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-07-09 18:06:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:04,641 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-07-09 18:06:04,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-07-09 18:06:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:06:04,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:04,642 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:04,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:06:04,643 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:04,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-07-09 18:06:04,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:04,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192757519] [2021-07-09 18:06:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:06:04,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:04,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192757519] [2021-07-09 18:06:04,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192757519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:04,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822954566] [2021-07-09 18:06:04,660 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:06:04,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:06:04,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:04,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:04,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:06:04,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822954566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:04,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:04,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 18:06:04,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951340898] [2021-07-09 18:06:04,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:06:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:06:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:06:04,724 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-07-09 18:06:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:04,733 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-07-09 18:06:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:06:04,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 [2021-07-09 18:06:04,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:04,734 INFO L225 Difference]: With dead ends: 79 [2021-07-09 18:06:04,734 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 18:06:04,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:06:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 18:06:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-07-09 18:06:04,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-07-09 18:06:04,741 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-07-09 18:06:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:04,741 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-07-09 18:06:04,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2021-07-09 18:06:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-07-09 18:06:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:06:04,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:04,742 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:04,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:04,953 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-07-09 18:06:04,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:04,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482977134] [2021-07-09 18:06:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:05,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:05,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482977134] [2021-07-09 18:06:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482977134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569820983] [2021-07-09 18:06:05,086 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) [2021-07-09 18:06:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:05,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:06:05,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:05,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:05,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:05,298 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 37 treesize of output 19 [2021-07-09 18:06:05,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:05,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:05,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:05,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-07-09 18:06:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569820983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:05,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:06:05,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329057864] [2021-07-09 18:06:05,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:06:05,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:06:05,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:06:05,335 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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) [2021-07-09 18:06:05,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:05,376 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-07-09 18:06:05,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:06:05,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 19 [2021-07-09 18:06:05,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:05,377 INFO L225 Difference]: With dead ends: 106 [2021-07-09 18:06:05,377 INFO L226 Difference]: Without dead ends: 89 [2021-07-09 18:06:05,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:06:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-09 18:06:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-07-09 18:06:05,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-07-09 18:06:05,383 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-07-09 18:06:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:05,383 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-07-09 18:06:05,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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) [2021-07-09 18:06:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-07-09 18:06:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:06:05,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:05,384 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:05,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:05,600 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:05,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-07-09 18:06:05,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:05,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045356005] [2021-07-09 18:06:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045356005] [2021-07-09 18:06:05,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045356005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668368309] [2021-07-09 18:06:05,684 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 [2021-07-09 18:06:05,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:05,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:05,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:06:05,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:05,783 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-09 18:06:05,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-07-09 18:06:05,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:05,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:05,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:05,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-07-09 18:06:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668368309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:05,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 18:06:05,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476396280] [2021-07-09 18:06:05,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:06:05,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:06:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:06:05,801 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-07-09 18:06:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:05,842 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-07-09 18:06:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:06:05,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 19 [2021-07-09 18:06:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:05,843 INFO L225 Difference]: With dead ends: 111 [2021-07-09 18:06:05,843 INFO L226 Difference]: Without dead ends: 96 [2021-07-09 18:06:05,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:06:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-07-09 18:06:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-07-09 18:06:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-07-09 18:06:05,849 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-07-09 18:06:05,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:05,849 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-07-09 18:06:05,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-07-09 18:06:05,849 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-07-09 18:06:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:06:05,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:05,850 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:06,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:06,071 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:06,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:06,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-07-09 18:06:06,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:06,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979176392] [2021-07-09 18:06:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:06,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:06,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979176392] [2021-07-09 18:06:06,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979176392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:06,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796983586] [2021-07-09 18:06:06,100 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 [2021-07-09 18:06:06,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:06:06,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:06,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:06:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:06,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796983586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:06,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:06,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-09 18:06:06,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714459146] [2021-07-09 18:06:06,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:06:06,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:06,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:06:06,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:06:06,166 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-07-09 18:06:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:06,181 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-07-09 18:06:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:06:06,182 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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 20 [2021-07-09 18:06:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:06,183 INFO L225 Difference]: With dead ends: 178 [2021-07-09 18:06:06,183 INFO L226 Difference]: Without dead ends: 175 [2021-07-09 18:06:06,184 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:06:06,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-09 18:06:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-07-09 18:06:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-07-09 18:06:06,201 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-07-09 18:06:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:06,201 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-07-09 18:06:06,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 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) [2021-07-09 18:06:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-07-09 18:06:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:06:06,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:06,202 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:06,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:06,421 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:06,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:06,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-07-09 18:06:06,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:06,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108520632] [2021-07-09 18:06:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:06,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:06,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108520632] [2021-07-09 18:06:06,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108520632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:06,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823104985] [2021-07-09 18:06:06,582 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 [2021-07-09 18:06:06,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:06,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:06,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:06:06,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:06,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:06,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:06,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:06,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:06,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:06,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-09 18:06:06,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:06,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:06,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:06,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-09 18:06:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:06,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823104985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:06,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:06,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:06:06,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835916744] [2021-07-09 18:06:06,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:06:06,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:06,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:06:06,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:06:06,773 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:06,870 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-07-09 18:06:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:06:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:06:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:06,871 INFO L225 Difference]: With dead ends: 229 [2021-07-09 18:06:06,871 INFO L226 Difference]: Without dead ends: 158 [2021-07-09 18:06:06,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 210.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:06:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-09 18:06:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-07-09 18:06:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.048780487804878) internal successors, (252), 123 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-07-09 18:06:06,875 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-07-09 18:06:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:06,875 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-07-09 18:06:06,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-07-09 18:06:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:06:06,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:06,876 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:07,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:07,089 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-07-09 18:06:07,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:07,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200747718] [2021-07-09 18:06:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:07,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:07,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200747718] [2021-07-09 18:06:07,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200747718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:07,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767489917] [2021-07-09 18:06:07,214 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 [2021-07-09 18:06:07,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:06:07,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:07,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:06:07,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:07,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:07,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:07,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-09 18:06:07,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:07,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-09 18:06:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:07,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767489917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:07,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:07,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:06:07,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922372695] [2021-07-09 18:06:07,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:06:07,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:07,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:06:07,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:06:07,414 INFO L87 Difference]: Start difference. First operand 124 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:07,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:07,467 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-07-09 18:06:07,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:06:07,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:06:07,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:07,469 INFO L225 Difference]: With dead ends: 242 [2021-07-09 18:06:07,469 INFO L226 Difference]: Without dead ends: 207 [2021-07-09 18:06:07,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 147.5ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:06:07,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-09 18:06:07,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-07-09 18:06:07,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 126 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:07,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-07-09 18:06:07,475 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-07-09 18:06:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:07,475 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-07-09 18:06:07,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:07,475 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-07-09 18:06:07,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:06:07,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:07,479 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:07,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:07,695 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:07,695 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-07-09 18:06:07,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:07,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657663904] [2021-07-09 18:06:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:07,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657663904] [2021-07-09 18:06:07,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657663904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:07,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105440436] [2021-07-09 18:06:07,813 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 [2021-07-09 18:06:07,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:06:07,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:06:07,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:07,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:07,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:07,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-09 18:06:07,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:07,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:07,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-09 18:06:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:07,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105440436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:07,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:07,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:06:07,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111283259] [2021-07-09 18:06:07,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:06:07,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:07,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:06:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:06:07,979 INFO L87 Difference]: Start difference. First operand 127 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:08,168 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-07-09 18:06:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:06:08,168 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:06:08,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:08,170 INFO L225 Difference]: With dead ends: 370 [2021-07-09 18:06:08,170 INFO L226 Difference]: Without dead ends: 231 [2021-07-09 18:06:08,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-07-09 18:06:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-07-09 18:06:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-07-09 18:06:08,175 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-07-09 18:06:08,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:08,176 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-07-09 18:06:08,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-07-09 18:06:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:06:08,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:08,178 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:08,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 18:06:08,395 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:08,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-07-09 18:06:08,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:08,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002682127] [2021-07-09 18:06:08,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:08,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:08,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002682127] [2021-07-09 18:06:08,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002682127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:08,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290086113] [2021-07-09 18:06:08,480 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 [2021-07-09 18:06:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:06:08,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:08,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:08,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:08,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 24 [2021-07-09 18:06:08,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:08,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:08,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:08,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-07-09 18:06:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:08,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290086113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:08,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:08,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:06:08,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498116554] [2021-07-09 18:06:08,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:06:08,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:08,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:06:08,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:06:08,625 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:08,721 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-07-09 18:06:08,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:06:08,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:06:08,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:08,723 INFO L225 Difference]: With dead ends: 296 [2021-07-09 18:06:08,723 INFO L226 Difference]: Without dead ends: 244 [2021-07-09 18:06:08,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:06:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-09 18:06:08,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-07-09 18:06:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 114 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-07-09 18:06:08,728 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-07-09 18:06:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:08,730 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-07-09 18:06:08,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-07-09 18:06:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:06:08,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:08,731 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:08,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:08,937 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-07-09 18:06:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:08,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772609459] [2021-07-09 18:06:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:09,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772609459] [2021-07-09 18:06:09,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772609459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405158234] [2021-07-09 18:06:09,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:09,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:09,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:06:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:09,197 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-09 18:06:09,197 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 54 treesize of output 24 [2021-07-09 18:06:09,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:09,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:09,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:09,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-07-09 18:06:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405158234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:09,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:06:09,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496577916] [2021-07-09 18:06:09,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:06:09,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:06:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:06:09,217 INFO L87 Difference]: Start difference. First operand 115 states and 234 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:09,276 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-07-09 18:06:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:06:09,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:06:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:09,277 INFO L225 Difference]: With dead ends: 174 [2021-07-09 18:06:09,277 INFO L226 Difference]: Without dead ends: 159 [2021-07-09 18:06:09,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 135.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:06:09,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-09 18:06:09,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-07-09 18:06:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:09,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-07-09 18:06:09,281 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-07-09 18:06:09,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:09,281 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-07-09 18:06:09,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-07-09 18:06:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:06:09,281 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:09,281 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:09,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:09,497 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:09,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:09,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-07-09 18:06:09,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:09,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446713886] [2021-07-09 18:06:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:09,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446713886] [2021-07-09 18:06:09,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446713886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551450728] [2021-07-09 18:06:09,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:09,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:06:09,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:09,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:06:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:09,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551450728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:09,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 18:06:09,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995077991] [2021-07-09 18:06:09,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:06:09,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:09,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:06:09,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:06:09,592 INFO L87 Difference]: Start difference. First operand 122 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-07-09 18:06:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:09,608 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-07-09 18:06:09,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:06:09,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:06:09,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:09,609 INFO L225 Difference]: With dead ends: 258 [2021-07-09 18:06:09,609 INFO L226 Difference]: Without dead ends: 254 [2021-07-09 18:06:09,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:06:09,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-07-09 18:06:09,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-07-09 18:06:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.104895104895105) internal successors, (301), 143 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-07-09 18:06:09,613 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-07-09 18:06:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:09,613 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-07-09 18:06:09,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2021-07-09 18:06:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-07-09 18:06:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:09,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:09,614 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:09,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:06:09,830 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:09,831 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-07-09 18:06:09,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:09,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281713716] [2021-07-09 18:06:09,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:06:09,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:09,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281713716] [2021-07-09 18:06:09,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281713716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:09,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728147616] [2021-07-09 18:06:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:09,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:09,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:09,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:06:09,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:10,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:10,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:10,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-09 18:06:10,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:10,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:10,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:10,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-09 18:06:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:10,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728147616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:10,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:10,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:06:10,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171253434] [2021-07-09 18:06:10,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:06:10,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:10,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:06:10,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:06:10,289 INFO L87 Difference]: Start difference. First operand 144 states and 301 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:10,476 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-07-09 18:06:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:06:10,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:10,478 INFO L225 Difference]: With dead ends: 412 [2021-07-09 18:06:10,478 INFO L226 Difference]: Without dead ends: 275 [2021-07-09 18:06:10,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-09 18:06:10,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-07-09 18:06:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.0324324324324325) internal successors, (376), 185 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-07-09 18:06:10,484 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-07-09 18:06:10,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:10,484 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-07-09 18:06:10,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,484 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-07-09 18:06:10,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:10,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:10,485 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:10,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:06:10,701 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-07-09 18:06:10,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:10,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626625770] [2021-07-09 18:06:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:10,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:10,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626625770] [2021-07-09 18:06:10,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626625770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:10,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572402786] [2021-07-09 18:06:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:10,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:06:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:06:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:11,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-09 18:06:11,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:11,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:11,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:11,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-09 18:06:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:11,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572402786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:11,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:11,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-07-09 18:06:11,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029799191] [2021-07-09 18:06:11,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:06:11,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:06:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:06:11,201 INFO L87 Difference]: Start difference. First operand 186 states and 376 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:11,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:11,287 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-07-09 18:06:11,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:06:11,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:11,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:11,289 INFO L225 Difference]: With dead ends: 449 [2021-07-09 18:06:11,289 INFO L226 Difference]: Without dead ends: 397 [2021-07-09 18:06:11,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:06:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-07-09 18:06:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-07-09 18:06:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-07-09 18:06:11,294 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-07-09 18:06:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:11,294 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-07-09 18:06:11,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-07-09 18:06:11,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:11,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:11,295 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:11,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:06:11,509 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-07-09 18:06:11,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:11,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805072583] [2021-07-09 18:06:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:11,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:11,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805072583] [2021-07-09 18:06:11,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805072583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:11,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924536711] [2021-07-09 18:06:11,675 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 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 [2021-07-09 18:06:11,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:06:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:11,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:06:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:11,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:11,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:11,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-09 18:06:11,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:11,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:11,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:11,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-09 18:06:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:11,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924536711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:11,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:11,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-07-09 18:06:11,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509321818] [2021-07-09 18:06:11,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:06:11,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:06:11,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:11,925 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:12,068 INFO L93 Difference]: Finished difference Result 418 states and 869 transitions. [2021-07-09 18:06:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:06:12,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:12,070 INFO L225 Difference]: With dead ends: 418 [2021-07-09 18:06:12,070 INFO L226 Difference]: Without dead ends: 381 [2021-07-09 18:06:12,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-07-09 18:06:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-07-09 18:06:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-07-09 18:06:12,075 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-07-09 18:06:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:12,075 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-07-09 18:06:12,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-07-09 18:06:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:12,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:12,075 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:12,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:12,276 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-07-09 18:06:12,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:12,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884481906] [2021-07-09 18:06:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:12,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:12,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884481906] [2021-07-09 18:06:12,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884481906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:12,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756848795] [2021-07-09 18:06:12,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:06:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:12,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:12,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:12,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-09 18:06:12,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:12,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:12,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:12,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-09 18:06:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:12,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756848795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:12,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:12,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-07-09 18:06:12,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577423294] [2021-07-09 18:06:12,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:06:12,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:12,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:06:12,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:12,664 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:12,881 INFO L93 Difference]: Finished difference Result 607 states and 1212 transitions. [2021-07-09 18:06:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:12,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:12,883 INFO L225 Difference]: With dead ends: 607 [2021-07-09 18:06:12,883 INFO L226 Difference]: Without dead ends: 443 [2021-07-09 18:06:12,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-09 18:06:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-07-09 18:06:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.9923076923076923) internal successors, (518), 260 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-07-09 18:06:12,888 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-07-09 18:06:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:12,888 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-07-09 18:06:12,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-07-09 18:06:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:12,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:12,888 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:13,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:13,089 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:13,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-07-09 18:06:13,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:13,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001082613] [2021-07-09 18:06:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:13,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:13,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001082613] [2021-07-09 18:06:13,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001082613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:13,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111161908] [2021-07-09 18:06:13,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:13,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:13,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:13,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:06:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:13,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:13,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:13,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-09 18:06:13,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:13,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:13,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:13,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-09 18:06:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:13,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111161908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:13,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:13,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 18:06:13,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608337518] [2021-07-09 18:06:13,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:06:13,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:06:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:06:13,445 INFO L87 Difference]: Start difference. First operand 261 states and 518 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:13,596 INFO L93 Difference]: Finished difference Result 566 states and 1153 transitions. [2021-07-09 18:06:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:06:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:13,598 INFO L225 Difference]: With dead ends: 566 [2021-07-09 18:06:13,598 INFO L226 Difference]: Without dead ends: 514 [2021-07-09 18:06:13,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:06:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-09 18:06:13,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-07-09 18:06:13,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.9758620689655173) internal successors, (573), 290 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-07-09 18:06:13,604 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-07-09 18:06:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:13,604 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-07-09 18:06:13,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-07-09 18:06:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:13,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:13,605 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:13,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:13,820 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:13,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-07-09 18:06:13,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:13,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526056191] [2021-07-09 18:06:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:13,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526056191] [2021-07-09 18:06:13,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526056191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:13,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823757942] [2021-07-09 18:06:13,970 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 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 [2021-07-09 18:06:14,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:06:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:06:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:14,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:14,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:14,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:14,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:14,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:14,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:14,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 31 [2021-07-09 18:06:14,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:14,342 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-09 18:06:14,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:14,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-07-09 18:06:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:14,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823757942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:14,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:14,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-07-09 18:06:14,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509626873] [2021-07-09 18:06:14,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:06:14,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:14,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:06:14,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:14,353 INFO L87 Difference]: Start difference. First operand 291 states and 573 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:14,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:14,874 INFO L93 Difference]: Finished difference Result 619 states and 1231 transitions. [2021-07-09 18:06:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:06:14,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:14,877 INFO L225 Difference]: With dead ends: 619 [2021-07-09 18:06:14,877 INFO L226 Difference]: Without dead ends: 501 [2021-07-09 18:06:14,886 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-07-09 18:06:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-07-09 18:06:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-07-09 18:06:14,895 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-07-09 18:06:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:14,895 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-07-09 18:06:14,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-07-09 18:06:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:14,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:14,897 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:15,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:06:15,105 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-07-09 18:06:15,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:15,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601537850] [2021-07-09 18:06:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:15,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601537850] [2021-07-09 18:06:15,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601537850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262270955] [2021-07-09 18:06:15,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:15,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:15,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 18:06:15,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:15,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:15,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-09 18:06:15,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:15,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:15,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:15,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-09 18:06:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262270955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:15,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 18:06:15,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535026903] [2021-07-09 18:06:15,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:06:15,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:15,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:06:15,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:15,457 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:15,579 INFO L93 Difference]: Finished difference Result 631 states and 1284 transitions. [2021-07-09 18:06:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:06:15,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:15,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:15,581 INFO L225 Difference]: With dead ends: 631 [2021-07-09 18:06:15,581 INFO L226 Difference]: Without dead ends: 579 [2021-07-09 18:06:15,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:15,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-07-09 18:06:15,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-07-09 18:06:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-07-09 18:06:15,587 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-07-09 18:06:15,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:15,587 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-07-09 18:06:15,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,587 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-07-09 18:06:15,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:06:15,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:15,588 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:15,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:06:15,804 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:15,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-07-09 18:06:15,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:15,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683599167] [2021-07-09 18:06:15,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683599167] [2021-07-09 18:06:15,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683599167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272942395] [2021-07-09 18:06:15,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:15,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:06:15,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:15,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:06:15,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:16,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:16,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:16,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:16,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 31 [2021-07-09 18:06:16,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:16,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:16,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:16,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-07-09 18:06:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:16,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272942395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:16,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:16,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 18:06:16,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639178812] [2021-07-09 18:06:16,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:06:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:06:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:16,193 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:16,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:16,340 INFO L93 Difference]: Finished difference Result 654 states and 1288 transitions. [2021-07-09 18:06:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:06:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:06:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:16,343 INFO L225 Difference]: With dead ends: 654 [2021-07-09 18:06:16,343 INFO L226 Difference]: Without dead ends: 498 [2021-07-09 18:06:16,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-09 18:06:16,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-07-09 18:06:16,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.9802259887005649) internal successors, (701), 354 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-07-09 18:06:16,351 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-07-09 18:06:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:16,351 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-07-09 18:06:16,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:16,352 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-07-09 18:06:16,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:16,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:16,352 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:16,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:06:16,571 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:16,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:16,572 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-07-09 18:06:16,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:16,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351726761] [2021-07-09 18:06:16,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:16,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:16,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351726761] [2021-07-09 18:06:16,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351726761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:16,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262148957] [2021-07-09 18:06:16,722 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:16,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:06:16,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:16,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:16,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:17,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:17,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:17,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:17,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:17,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:17,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:17,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:17,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:17,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262148957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:17,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:17,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 18:06:17,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091426025] [2021-07-09 18:06:17,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:06:17,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:06:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:17,044 INFO L87 Difference]: Start difference. First operand 355 states and 701 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:17,266 INFO L93 Difference]: Finished difference Result 666 states and 1349 transitions. [2021-07-09 18:06:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:17,268 INFO L225 Difference]: With dead ends: 666 [2021-07-09 18:06:17,268 INFO L226 Difference]: Without dead ends: 629 [2021-07-09 18:06:17,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-07-09 18:06:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-07-09 18:06:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.9724517906336088) internal successors, (716), 363 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-07-09 18:06:17,274 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-07-09 18:06:17,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:17,274 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-07-09 18:06:17,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-07-09 18:06:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:17,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:17,275 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:17,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:06:17,491 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:17,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:17,491 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-07-09 18:06:17,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:17,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963367881] [2021-07-09 18:06:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:17,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:17,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963367881] [2021-07-09 18:06:17,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963367881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:17,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375127613] [2021-07-09 18:06:17,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:17,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:17,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:17,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:18,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:18,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:18,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:18,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:18,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:18,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:18,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:18,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:18,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375127613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:18,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:18,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-07-09 18:06:18,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235719691] [2021-07-09 18:06:18,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:06:18,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:18,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:06:18,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:06:18,077 INFO L87 Difference]: Start difference. First operand 364 states and 716 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:18,311 INFO L93 Difference]: Finished difference Result 559 states and 1114 transitions. [2021-07-09 18:06:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:18,313 INFO L225 Difference]: With dead ends: 559 [2021-07-09 18:06:18,313 INFO L226 Difference]: Without dead ends: 532 [2021-07-09 18:06:18,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:06:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-09 18:06:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-07-09 18:06:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.9667673716012084) internal successors, (651), 331 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-07-09 18:06:18,321 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-07-09 18:06:18,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:18,322 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-07-09 18:06:18,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-07-09 18:06:18,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:18,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:18,323 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:18,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:06:18,536 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-07-09 18:06:18,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:18,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225051170] [2021-07-09 18:06:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:18,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225051170] [2021-07-09 18:06:18,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225051170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:18,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882489660] [2021-07-09 18:06:18,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:18,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:18,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:18,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:18,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:19,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:19,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:19,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:19,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:19,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882489660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:19,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:19,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 18:06:19,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076967247] [2021-07-09 18:06:19,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:06:19,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:06:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:19,068 INFO L87 Difference]: Start difference. First operand 332 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:19,238 INFO L93 Difference]: Finished difference Result 724 states and 1487 transitions. [2021-07-09 18:06:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:19,240 INFO L225 Difference]: With dead ends: 724 [2021-07-09 18:06:19,240 INFO L226 Difference]: Without dead ends: 666 [2021-07-09 18:06:19,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-07-09 18:06:19,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-07-09 18:06:19,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.013986013986014) internal successors, (576), 286 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:19,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-07-09 18:06:19,249 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-07-09 18:06:19,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:19,249 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-07-09 18:06:19,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-07-09 18:06:19,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:19,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:19,249 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:19,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:19,465 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:19,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-07-09 18:06:19,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:19,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807499328] [2021-07-09 18:06:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:19,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:19,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807499328] [2021-07-09 18:06:19,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807499328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:19,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299007930] [2021-07-09 18:06:19,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:19,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:06:19,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:19,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:19,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:19,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:19,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:19,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:19,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:19,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:19,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:19,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:19,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299007930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:19,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:19,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-07-09 18:06:19,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241397688] [2021-07-09 18:06:19,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:06:19,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:19,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:06:19,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:19,915 INFO L87 Difference]: Start difference. First operand 287 states and 576 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:20,131 INFO L93 Difference]: Finished difference Result 700 states and 1406 transitions. [2021-07-09 18:06:20,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:20,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:20,133 INFO L225 Difference]: With dead ends: 700 [2021-07-09 18:06:20,133 INFO L226 Difference]: Without dead ends: 523 [2021-07-09 18:06:20,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-07-09 18:06:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-07-09 18:06:20,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.9938461538461538) internal successors, (648), 325 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-07-09 18:06:20,138 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-07-09 18:06:20,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:20,138 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-07-09 18:06:20,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,138 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-07-09 18:06:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:20,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:20,139 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:20,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:06:20,346 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-07-09 18:06:20,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:20,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023681703] [2021-07-09 18:06:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:20,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:20,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023681703] [2021-07-09 18:06:20,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023681703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:20,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287368288] [2021-07-09 18:06:20,502 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 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 [2021-07-09 18:06:20,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:20,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:20,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:20,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:20,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:20,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:20,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:20,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:20,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:20,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287368288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:20,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:20,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:06:20,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511195648] [2021-07-09 18:06:20,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:06:20,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:20,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:06:20,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:06:20,829 INFO L87 Difference]: Start difference. First operand 326 states and 648 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:21,067 INFO L93 Difference]: Finished difference Result 672 states and 1391 transitions. [2021-07-09 18:06:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:21,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:21,069 INFO L225 Difference]: With dead ends: 672 [2021-07-09 18:06:21,069 INFO L226 Difference]: Without dead ends: 617 [2021-07-09 18:06:21,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:06:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-07-09 18:06:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-07-09 18:06:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-07-09 18:06:21,074 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-07-09 18:06:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:21,074 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-07-09 18:06:21,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-07-09 18:06:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:21,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:21,075 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:21,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:21,275 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-07-09 18:06:21,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:21,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213799390] [2021-07-09 18:06:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:21,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:21,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213799390] [2021-07-09 18:06:21,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213799390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:21,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298755694] [2021-07-09 18:06:21,457 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 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 [2021-07-09 18:06:21,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:06:21,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:21,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:06:21,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:21,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:21,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2021-07-09 18:06:21,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:21,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:21,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:21,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:3 [2021-07-09 18:06:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:21,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298755694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:21,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:21,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:06:21,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022867981] [2021-07-09 18:06:21,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:06:21,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:21,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:06:21,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:06:21,824 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:22,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:22,626 INFO L93 Difference]: Finished difference Result 703 states and 1400 transitions. [2021-07-09 18:06:22,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:06:22,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:22,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:22,628 INFO L225 Difference]: With dead ends: 703 [2021-07-09 18:06:22,628 INFO L226 Difference]: Without dead ends: 485 [2021-07-09 18:06:22,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:06:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-09 18:06:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 323. [2021-07-09 18:06:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.9968944099378882) internal successors, (643), 322 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-07-09 18:06:22,633 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-07-09 18:06:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:22,633 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-07-09 18:06:22,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-07-09 18:06:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:22,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:22,634 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:22,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:06:22,849 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-07-09 18:06:22,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:22,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599190562] [2021-07-09 18:06:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:23,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:23,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599190562] [2021-07-09 18:06:23,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599190562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:23,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519635122] [2021-07-09 18:06:23,005 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 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 [2021-07-09 18:06:23,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:06:23,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:23,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:23,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:23,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:23,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:23,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:23,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:23,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:23,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:23,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519635122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:23,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:23,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-07-09 18:06:23,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234991410] [2021-07-09 18:06:23,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:06:23,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:06:23,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:23,341 INFO L87 Difference]: Start difference. First operand 323 states and 643 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-07-09 18:06:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:23,622 INFO L93 Difference]: Finished difference Result 636 states and 1284 transitions. [2021-07-09 18:06:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:06:23,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 [2021-07-09 18:06:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:23,623 INFO L225 Difference]: With dead ends: 636 [2021-07-09 18:06:23,623 INFO L226 Difference]: Without dead ends: 591 [2021-07-09 18:06:23,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:06:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-09 18:06:23,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-07-09 18:06:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.0065789473684212) internal successors, (610), 304 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-07-09 18:06:23,629 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-07-09 18:06:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:23,629 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-07-09 18:06:23,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-07-09 18:06:23,630 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-07-09 18:06:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:23,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:23,630 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:23,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:23,837 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:23,837 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-07-09 18:06:23,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:23,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531377697] [2021-07-09 18:06:23,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:24,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:24,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531377697] [2021-07-09 18:06:24,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531377697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:24,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637552246] [2021-07-09 18:06:24,002 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 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 [2021-07-09 18:06:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:24,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:24,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:24,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:24,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:24,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:24,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:24,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:24,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:24,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:24,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637552246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:24,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:24,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-09 18:06:24,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597063144] [2021-07-09 18:06:24,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:24,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:24,272 INFO L87 Difference]: Start difference. First operand 305 states and 610 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:24,595 INFO L93 Difference]: Finished difference Result 779 states and 1533 transitions. [2021-07-09 18:06:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:06:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:24,597 INFO L225 Difference]: With dead ends: 779 [2021-07-09 18:06:24,597 INFO L226 Difference]: Without dead ends: 565 [2021-07-09 18:06:24,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 433.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-09 18:06:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-07-09 18:06:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.9658119658119657) internal successors, (690), 351 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-07-09 18:06:24,603 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-07-09 18:06:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:24,603 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-07-09 18:06:24,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-07-09 18:06:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:24,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:24,604 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:24,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:06:24,811 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-07-09 18:06:24,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:24,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754128759] [2021-07-09 18:06:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:24,978 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:24,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:24,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754128759] [2021-07-09 18:06:24,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754128759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:24,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541985538] [2021-07-09 18:06:24,979 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 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 [2021-07-09 18:06:25,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:25,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:25,003 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:25,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:25,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:25,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:25,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:25,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:25,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:25,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:25,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:25,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541985538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:25,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:25,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-07-09 18:06:25,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216120824] [2021-07-09 18:06:25,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:25,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:25,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:25,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:25,264 INFO L87 Difference]: Start difference. First operand 352 states and 690 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:25,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:25,542 INFO L93 Difference]: Finished difference Result 731 states and 1404 transitions. [2021-07-09 18:06:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:06:25,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:25,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:25,544 INFO L225 Difference]: With dead ends: 731 [2021-07-09 18:06:25,544 INFO L226 Difference]: Without dead ends: 505 [2021-07-09 18:06:25,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-09 18:06:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-07-09 18:06:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.8725868725868726) internal successors, (485), 259 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:25,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-07-09 18:06:25,549 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-07-09 18:06:25,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:25,549 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-07-09 18:06:25,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-07-09 18:06:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:25,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:25,549 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:25,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:25,762 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-07-09 18:06:25,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:25,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360159491] [2021-07-09 18:06:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:25,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360159491] [2021-07-09 18:06:25,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360159491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541546623] [2021-07-09 18:06:25,910 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 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 [2021-07-09 18:06:25,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:06:25,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:25,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-07-09 18:06:25,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:26,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:26,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:26,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:26,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:26,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,234 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-09 18:06:26,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:26,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2021-07-09 18:06:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:26,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541546623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:26,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:26,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 18:06:26,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580846428] [2021-07-09 18:06:26,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:06:26,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:06:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:06:26,244 INFO L87 Difference]: Start difference. First operand 260 states and 485 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:26,986 INFO L93 Difference]: Finished difference Result 858 states and 1666 transitions. [2021-07-09 18:06:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:06:26,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:26,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:26,988 INFO L225 Difference]: With dead ends: 858 [2021-07-09 18:06:26,988 INFO L226 Difference]: Without dead ends: 613 [2021-07-09 18:06:26,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 724.4ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:06:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-07-09 18:06:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 333. [2021-07-09 18:06:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.9216867469879517) internal successors, (638), 332 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 638 transitions. [2021-07-09 18:06:26,994 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 638 transitions. Word has length 31 [2021-07-09 18:06:26,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:26,994 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 638 transitions. [2021-07-09 18:06:26,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:26,994 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 638 transitions. [2021-07-09 18:06:26,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:26,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:26,995 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:27,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:06:27,209 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-07-09 18:06:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:27,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761816597] [2021-07-09 18:06:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:27,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:27,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761816597] [2021-07-09 18:06:27,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761816597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:27,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820187514] [2021-07-09 18:06:27,384 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 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 [2021-07-09 18:06:27,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:27,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:27,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:27,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:27,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:27,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:27,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:27,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:27,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:27,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:27,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:27,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820187514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:27,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:27,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-07-09 18:06:27,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080841636] [2021-07-09 18:06:27,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:06:27,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:27,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:06:27,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:27,637 INFO L87 Difference]: Start difference. First operand 333 states and 638 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:27,962 INFO L93 Difference]: Finished difference Result 821 states and 1585 transitions. [2021-07-09 18:06:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:06:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:27,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:27,964 INFO L225 Difference]: With dead ends: 821 [2021-07-09 18:06:27,964 INFO L226 Difference]: Without dead ends: 610 [2021-07-09 18:06:27,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 467.3ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-07-09 18:06:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 402. [2021-07-09 18:06:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.887780548628429) internal successors, (757), 401 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 757 transitions. [2021-07-09 18:06:27,971 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 757 transitions. Word has length 31 [2021-07-09 18:06:27,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:27,971 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 757 transitions. [2021-07-09 18:06:27,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:27,971 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 757 transitions. [2021-07-09 18:06:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:27,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:27,971 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:28,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:28,187 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:28,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:28,187 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-07-09 18:06:28,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:28,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048035859] [2021-07-09 18:06:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:28,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048035859] [2021-07-09 18:06:28,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048035859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:28,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824556674] [2021-07-09 18:06:28,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:06:28,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:06:28,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:28,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:28,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:28,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:28,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:28,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:28,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:28,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:28,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:28,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:28,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824556674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:28,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:28,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-07-09 18:06:28,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014880340] [2021-07-09 18:06:28,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:06:28,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:28,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:06:28,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:28,619 INFO L87 Difference]: Start difference. First operand 402 states and 757 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:28,768 INFO L93 Difference]: Finished difference Result 762 states and 1488 transitions. [2021-07-09 18:06:28,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:28,769 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:28,771 INFO L225 Difference]: With dead ends: 762 [2021-07-09 18:06:28,771 INFO L226 Difference]: Without dead ends: 717 [2021-07-09 18:06:28,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-09 18:06:28,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 393. [2021-07-09 18:06:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.885204081632653) internal successors, (739), 392 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 739 transitions. [2021-07-09 18:06:28,777 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 739 transitions. Word has length 31 [2021-07-09 18:06:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:28,777 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 739 transitions. [2021-07-09 18:06:28,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 739 transitions. [2021-07-09 18:06:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:28,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:28,778 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:28,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-09 18:06:28,991 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-07-09 18:06:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:28,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165632447] [2021-07-09 18:06:28,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:29,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165632447] [2021-07-09 18:06:29,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165632447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:29,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741730493] [2021-07-09 18:06:29,148 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 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 [2021-07-09 18:06:29,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:06:29,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:29,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:29,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:29,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:29,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:29,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:29,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:29,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:29,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-07-09 18:06:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:29,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741730493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:29,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:29,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-09 18:06:29,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134373269] [2021-07-09 18:06:29,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:29,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:29,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:29,415 INFO L87 Difference]: Start difference. First operand 393 states and 739 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:29,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:29,565 INFO L93 Difference]: Finished difference Result 745 states and 1468 transitions. [2021-07-09 18:06:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:29,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:29,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:29,567 INFO L225 Difference]: With dead ends: 745 [2021-07-09 18:06:29,567 INFO L226 Difference]: Without dead ends: 700 [2021-07-09 18:06:29,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:06:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-07-09 18:06:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 414. [2021-07-09 18:06:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.8934624697336562) internal successors, (782), 413 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 782 transitions. [2021-07-09 18:06:29,574 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 782 transitions. Word has length 31 [2021-07-09 18:06:29,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:29,574 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 782 transitions. [2021-07-09 18:06:29,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 782 transitions. [2021-07-09 18:06:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-09 18:06:29,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:29,574 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:29,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:06:29,789 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-07-09 18:06:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:29,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736742004] [2021-07-09 18:06:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:29,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:29,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736742004] [2021-07-09 18:06:29,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736742004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:29,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584311073] [2021-07-09 18:06:29,945 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 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 [2021-07-09 18:06:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:29,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:06:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:30,134 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-07-09 18:06:30,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-07-09 18:06:30,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:30,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:30,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:30,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-07-09 18:06:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:30,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584311073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:30,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-07-09 18:06:30,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077069074] [2021-07-09 18:06:30,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:06:30,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:30,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:06:30,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:30,150 INFO L87 Difference]: Start difference. First operand 414 states and 782 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:30,351 INFO L93 Difference]: Finished difference Result 609 states and 1180 transitions. [2021-07-09 18:06:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:06:30,351 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-09 18:06:30,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:30,353 INFO L225 Difference]: With dead ends: 609 [2021-07-09 18:06:30,353 INFO L226 Difference]: Without dead ends: 594 [2021-07-09 18:06:30,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-07-09 18:06:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 421. [2021-07-09 18:06:30,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.8976190476190475) internal successors, (797), 420 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 797 transitions. [2021-07-09 18:06:30,359 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 797 transitions. Word has length 31 [2021-07-09 18:06:30,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:30,359 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 797 transitions. [2021-07-09 18:06:30,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 797 transitions. [2021-07-09 18:06:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:06:30,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:30,360 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:30,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:06:30,573 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:30,574 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-07-09 18:06:30,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:30,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935667419] [2021-07-09 18:06:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:06:30,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:30,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935667419] [2021-07-09 18:06:30,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935667419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682951288] [2021-07-09 18:06:30,613 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 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 [2021-07-09 18:06:30,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:30,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:06:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:06:30,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682951288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 18:06:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517983862] [2021-07-09 18:06:30,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:06:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:06:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:06:30,681 INFO L87 Difference]: Start difference. First operand 421 states and 797 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:30,711 INFO L93 Difference]: Finished difference Result 646 states and 1247 transitions. [2021-07-09 18:06:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:06:30,711 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:06:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:30,713 INFO L225 Difference]: With dead ends: 646 [2021-07-09 18:06:30,713 INFO L226 Difference]: Without dead ends: 640 [2021-07-09 18:06:30,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:06:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-09 18:06:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 540. [2021-07-09 18:06:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.0037105751391464) internal successors, (1080), 539 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1080 transitions. [2021-07-09 18:06:30,721 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1080 transitions. Word has length 32 [2021-07-09 18:06:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:30,721 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1080 transitions. [2021-07-09 18:06:30,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1080 transitions. [2021-07-09 18:06:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:06:30,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:30,722 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:30,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:06:30,933 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:30,933 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-07-09 18:06:30,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:30,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515475005] [2021-07-09 18:06:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:30,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:30,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515475005] [2021-07-09 18:06:30,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515475005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917616644] [2021-07-09 18:06:30,964 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:06:30,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:06:30,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:30,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:06:31,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:31,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917616644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:31,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:31,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 18:06:31,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008438737] [2021-07-09 18:06:31,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:06:31,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:31,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:06:31,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:06:31,041 INFO L87 Difference]: Start difference. First operand 540 states and 1080 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:31,065 INFO L93 Difference]: Finished difference Result 817 states and 1634 transitions. [2021-07-09 18:06:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:06:31,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:06:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:31,068 INFO L225 Difference]: With dead ends: 817 [2021-07-09 18:06:31,068 INFO L226 Difference]: Without dead ends: 811 [2021-07-09 18:06:31,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:06:31,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-07-09 18:06:31,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 585. [2021-07-09 18:06:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.0256849315068495) internal successors, (1183), 584 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1183 transitions. [2021-07-09 18:06:31,075 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1183 transitions. Word has length 32 [2021-07-09 18:06:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:31,075 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1183 transitions. [2021-07-09 18:06:31,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1183 transitions. [2021-07-09 18:06:31,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:31,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:31,076 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:31,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:06:31,292 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-07-09 18:06:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628984665] [2021-07-09 18:06:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:31,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:31,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628984665] [2021-07-09 18:06:31,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628984665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:31,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897537502] [2021-07-09 18:06:31,459 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 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 [2021-07-09 18:06:31,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:31,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:31,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:31,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:31,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:31,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:31,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:31,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:31,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:31,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:31,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:31,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897537502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:31,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:31,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-07-09 18:06:31,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813133523] [2021-07-09 18:06:31,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:06:31,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:06:31,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:06:31,884 INFO L87 Difference]: Start difference. First operand 585 states and 1183 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:32,233 INFO L93 Difference]: Finished difference Result 1500 states and 3118 transitions. [2021-07-09 18:06:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:06:32,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:32,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:32,237 INFO L225 Difference]: With dead ends: 1500 [2021-07-09 18:06:32,237 INFO L226 Difference]: Without dead ends: 1408 [2021-07-09 18:06:32,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:06:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-07-09 18:06:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 627. [2021-07-09 18:06:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.0143769968051117) internal successors, (1261), 626 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1261 transitions. [2021-07-09 18:06:32,251 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1261 transitions. Word has length 35 [2021-07-09 18:06:32,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:32,251 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1261 transitions. [2021-07-09 18:06:32,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,251 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1261 transitions. [2021-07-09 18:06:32,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:32,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:32,252 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:32,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:06:32,468 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-07-09 18:06:32,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:32,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616335486] [2021-07-09 18:06:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:32,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:32,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616335486] [2021-07-09 18:06:32,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616335486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:32,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329341924] [2021-07-09 18:06:32,653 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 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 [2021-07-09 18:06:32,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:06:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:32,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:33,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:33,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:33,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:33,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:33,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:33,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:33,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:33,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:33,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:33,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:33,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329341924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:33,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:33,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-09 18:06:33,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347537945] [2021-07-09 18:06:33,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:06:33,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:33,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:06:33,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:33,099 INFO L87 Difference]: Start difference. First operand 627 states and 1261 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:33,413 INFO L93 Difference]: Finished difference Result 1498 states and 3132 transitions. [2021-07-09 18:06:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:06:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:33,417 INFO L225 Difference]: With dead ends: 1498 [2021-07-09 18:06:33,417 INFO L226 Difference]: Without dead ends: 1403 [2021-07-09 18:06:33,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-07-09 18:06:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 543. [2021-07-09 18:06:33,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.0387453874538743) internal successors, (1105), 542 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:33,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1105 transitions. [2021-07-09 18:06:33,425 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1105 transitions. Word has length 35 [2021-07-09 18:06:33,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:33,425 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1105 transitions. [2021-07-09 18:06:33,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:33,426 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1105 transitions. [2021-07-09 18:06:33,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:33,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:33,426 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:33,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 18:06:33,641 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:33,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-07-09 18:06:33,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:33,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863091080] [2021-07-09 18:06:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:33,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:33,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863091080] [2021-07-09 18:06:33,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863091080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:33,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000444131] [2021-07-09 18:06:33,799 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 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 [2021-07-09 18:06:33,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:06:33,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:33,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:34,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:34,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:34,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:34,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:34,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:34,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:34,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:34,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:34,185 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:34,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000444131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:34,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:34,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-07-09 18:06:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252198288] [2021-07-09 18:06:34,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:06:34,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:34,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:06:34,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:06:34,186 INFO L87 Difference]: Start difference. First operand 543 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:34,394 INFO L93 Difference]: Finished difference Result 1268 states and 2646 transitions. [2021-07-09 18:06:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:34,398 INFO L225 Difference]: With dead ends: 1268 [2021-07-09 18:06:34,398 INFO L226 Difference]: Without dead ends: 1078 [2021-07-09 18:06:34,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:06:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-09 18:06:34,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 573. [2021-07-09 18:06:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-07-09 18:06:34,405 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-07-09 18:06:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:34,406 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-07-09 18:06:34,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-07-09 18:06:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:34,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:34,407 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:34,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:34,621 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-07-09 18:06:34,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:34,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122994976] [2021-07-09 18:06:34,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:34,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122994976] [2021-07-09 18:06:34,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122994976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480932308] [2021-07-09 18:06:34,849 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 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 [2021-07-09 18:06:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:34,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:35,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:35,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:35,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:35,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:35,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:35,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:35,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:35,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480932308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:35,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:35,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-09 18:06:35,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450631600] [2021-07-09 18:06:35,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:06:35,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:06:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:35,310 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:35,605 INFO L93 Difference]: Finished difference Result 1258 states and 2602 transitions. [2021-07-09 18:06:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:06:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:35,609 INFO L225 Difference]: With dead ends: 1258 [2021-07-09 18:06:35,610 INFO L226 Difference]: Without dead ends: 1204 [2021-07-09 18:06:35,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:35,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-07-09 18:06:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 567. [2021-07-09 18:06:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.0247349823321557) internal successors, (1146), 566 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1146 transitions. [2021-07-09 18:06:35,621 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1146 transitions. Word has length 35 [2021-07-09 18:06:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:35,621 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1146 transitions. [2021-07-09 18:06:35,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1146 transitions. [2021-07-09 18:06:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:35,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:35,622 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:35,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:35,837 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:35,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:35,837 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-07-09 18:06:35,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:35,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489149153] [2021-07-09 18:06:35,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:36,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:36,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489149153] [2021-07-09 18:06:36,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489149153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:36,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880306546] [2021-07-09 18:06:36,137 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 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 [2021-07-09 18:06:36,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:36,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:36,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:36,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:36,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:36,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:36,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:36,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:36,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:36,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:36,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:36,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880306546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:36,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:36,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-07-09 18:06:36,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399329800] [2021-07-09 18:06:36,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:06:36,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:36,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:06:36,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:36,690 INFO L87 Difference]: Start difference. First operand 567 states and 1146 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:37,078 INFO L93 Difference]: Finished difference Result 934 states and 1907 transitions. [2021-07-09 18:06:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:37,086 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:37,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:37,089 INFO L225 Difference]: With dead ends: 934 [2021-07-09 18:06:37,089 INFO L226 Difference]: Without dead ends: 913 [2021-07-09 18:06:37,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 606.6ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:06:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-07-09 18:06:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 573. [2021-07-09 18:06:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-07-09 18:06:37,096 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-07-09 18:06:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:37,096 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-07-09 18:06:37,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-07-09 18:06:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:37,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:37,097 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:37,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:37,297 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-07-09 18:06:37,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:37,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675497020] [2021-07-09 18:06:37,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:37,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:37,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675497020] [2021-07-09 18:06:37,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675497020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:37,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681817436] [2021-07-09 18:06:37,521 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 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 [2021-07-09 18:06:37,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:06:37,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:37,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:37,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:38,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:38,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:38,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:38,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:38,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-07-09 18:06:38,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:39,012 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-07-09 18:06:39,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:39,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:124, output treesize:7 [2021-07-09 18:06:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681817436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:39,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:39,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-09 18:06:39,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214726561] [2021-07-09 18:06:39,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:06:39,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:06:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:39,023 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:43,784 INFO L93 Difference]: Finished difference Result 1198 states and 2387 transitions. [2021-07-09 18:06:43,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:06:43,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:43,787 INFO L225 Difference]: With dead ends: 1198 [2021-07-09 18:06:43,787 INFO L226 Difference]: Without dead ends: 976 [2021-07-09 18:06:43,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2635.7ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-07-09 18:06:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 673. [2021-07-09 18:06:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.9970238095238095) internal successors, (1342), 672 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1342 transitions. [2021-07-09 18:06:43,795 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1342 transitions. Word has length 35 [2021-07-09 18:06:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:43,795 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 1342 transitions. [2021-07-09 18:06:43,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1342 transitions. [2021-07-09 18:06:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:43,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:43,796 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:44,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:06:44,005 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:44,005 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-07-09 18:06:44,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:44,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780895457] [2021-07-09 18:06:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:44,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:44,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780895457] [2021-07-09 18:06:44,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780895457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:44,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266477687] [2021-07-09 18:06:44,228 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 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 [2021-07-09 18:06:44,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:44,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:44,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:44,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:44,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:44,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:44,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:44,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:44,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:44,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:44,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:44,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:44,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:44,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:44,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266477687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:44,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:44,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-09 18:06:44,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124045133] [2021-07-09 18:06:44,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:06:44,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:06:44,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:06:44,643 INFO L87 Difference]: Start difference. First operand 673 states and 1342 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:44,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:44,856 INFO L93 Difference]: Finished difference Result 1761 states and 3634 transitions. [2021-07-09 18:06:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:06:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:44,859 INFO L225 Difference]: With dead ends: 1761 [2021-07-09 18:06:44,859 INFO L226 Difference]: Without dead ends: 1632 [2021-07-09 18:06:44,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 468.3ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:06:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-07-09 18:06:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 763. [2021-07-09 18:06:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.9855643044619422) internal successors, (1513), 762 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1513 transitions. [2021-07-09 18:06:44,870 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1513 transitions. Word has length 35 [2021-07-09 18:06:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:44,870 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1513 transitions. [2021-07-09 18:06:44,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1513 transitions. [2021-07-09 18:06:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:44,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:44,871 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:45,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:45,086 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:45,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-07-09 18:06:45,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:45,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443341066] [2021-07-09 18:06:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:45,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:45,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443341066] [2021-07-09 18:06:45,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443341066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:45,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670727460] [2021-07-09 18:06:45,277 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 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 [2021-07-09 18:06:45,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:06:45,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:45,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:06:45,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:45,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:45,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:45,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:45,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:45,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2021-07-09 18:06:45,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:45,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:45,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:45,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-07-09 18:06:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:45,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670727460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:45,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:45,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-07-09 18:06:45,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233377277] [2021-07-09 18:06:45,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:06:45,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:45,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:06:45,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:06:45,772 INFO L87 Difference]: Start difference. First operand 763 states and 1513 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:46,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:46,710 INFO L93 Difference]: Finished difference Result 1434 states and 2903 transitions. [2021-07-09 18:06:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:06:46,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:46,712 INFO L225 Difference]: With dead ends: 1434 [2021-07-09 18:06:46,712 INFO L226 Difference]: Without dead ends: 1212 [2021-07-09 18:06:46,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1001.9ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:06:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-07-09 18:06:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 799. [2021-07-09 18:06:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.9862155388471179) internal successors, (1585), 798 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1585 transitions. [2021-07-09 18:06:46,722 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1585 transitions. Word has length 35 [2021-07-09 18:06:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:46,722 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 1585 transitions. [2021-07-09 18:06:46,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:46,722 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1585 transitions. [2021-07-09 18:06:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:46,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:46,723 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:46,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:46,939 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-07-09 18:06:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:46,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444890640] [2021-07-09 18:06:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:47,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:47,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444890640] [2021-07-09 18:06:47,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444890640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:47,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828452744] [2021-07-09 18:06:47,141 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 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 [2021-07-09 18:06:47,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:06:47,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:47,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:47,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:47,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:47,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:47,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:47,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:47,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:47,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:47,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:47,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:47,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828452744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:47,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:47,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 18:06:47,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223658422] [2021-07-09 18:06:47,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:06:47,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:06:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:06:47,529 INFO L87 Difference]: Start difference. First operand 799 states and 1585 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:47,735 INFO L93 Difference]: Finished difference Result 1504 states and 3031 transitions. [2021-07-09 18:06:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:06:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:47,737 INFO L225 Difference]: With dead ends: 1504 [2021-07-09 18:06:47,737 INFO L226 Difference]: Without dead ends: 1463 [2021-07-09 18:06:47,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:06:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-07-09 18:06:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 826. [2021-07-09 18:06:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.9903030303030302) internal successors, (1642), 825 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1642 transitions. [2021-07-09 18:06:47,748 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1642 transitions. Word has length 35 [2021-07-09 18:06:47,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:47,748 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1642 transitions. [2021-07-09 18:06:47,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1642 transitions. [2021-07-09 18:06:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:47,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:47,749 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:47,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-09 18:06:47,965 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-07-09 18:06:47,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:47,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489299064] [2021-07-09 18:06:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:48,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:48,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489299064] [2021-07-09 18:06:48,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489299064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:48,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506820594] [2021-07-09 18:06:48,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:48,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:48,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:48,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:48,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:48,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:48,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:48,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:48,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:48,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:48,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:48,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506820594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:48,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:48,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-09 18:06:48,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145601403] [2021-07-09 18:06:48,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:06:48,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:48,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:06:48,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:06:48,579 INFO L87 Difference]: Start difference. First operand 826 states and 1642 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:48,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:48,974 INFO L93 Difference]: Finished difference Result 1685 states and 3364 transitions. [2021-07-09 18:06:48,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:06:48,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:48,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:48,977 INFO L225 Difference]: With dead ends: 1685 [2021-07-09 18:06:48,977 INFO L226 Difference]: Without dead ends: 1455 [2021-07-09 18:06:48,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 643.8ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:06:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-07-09 18:06:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 996. [2021-07-09 18:06:48,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.977889447236181) internal successors, (1968), 995 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1968 transitions. [2021-07-09 18:06:48,994 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1968 transitions. Word has length 35 [2021-07-09 18:06:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:48,994 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 1968 transitions. [2021-07-09 18:06:48,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1968 transitions. [2021-07-09 18:06:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:48,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:48,996 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:49,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-09 18:06:49,212 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:49,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-07-09 18:06:49,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:49,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085079221] [2021-07-09 18:06:49,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:06:49,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:49,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085079221] [2021-07-09 18:06:49,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085079221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:49,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803963709] [2021-07-09 18:06:49,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:49,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:49,394 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:49,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:49,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:49,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:49,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:49,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:49,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:49,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:49,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:49,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:49,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803963709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:49,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:49,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-07-09 18:06:49,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346693106] [2021-07-09 18:06:49,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:06:49,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:49,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:06:49,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:06:49,710 INFO L87 Difference]: Start difference. First operand 996 states and 1968 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:50,186 INFO L93 Difference]: Finished difference Result 1889 states and 3808 transitions. [2021-07-09 18:06:50,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:06:50,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:50,189 INFO L225 Difference]: With dead ends: 1889 [2021-07-09 18:06:50,189 INFO L226 Difference]: Without dead ends: 1691 [2021-07-09 18:06:50,189 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 570.3ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:06:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-07-09 18:06:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1029. [2021-07-09 18:06:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.9815175097276265) internal successors, (2037), 1028 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2037 transitions. [2021-07-09 18:06:50,202 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2037 transitions. Word has length 35 [2021-07-09 18:06:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:50,202 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 2037 transitions. [2021-07-09 18:06:50,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2037 transitions. [2021-07-09 18:06:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:50,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:50,204 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:50,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:06:50,413 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-07-09 18:06:50,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:50,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940479699] [2021-07-09 18:06:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:50,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:50,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940479699] [2021-07-09 18:06:50,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940479699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:50,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644715965] [2021-07-09 18:06:50,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:50,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:06:50,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:50,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-07-09 18:06:50,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:51,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:51,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2021-07-09 18:06:51,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,108 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-09 18:06:51,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:51,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-07-09 18:06:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:51,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644715965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:51,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:51,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-09 18:06:51,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453237497] [2021-07-09 18:06:51,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:06:51,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:06:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:51,119 INFO L87 Difference]: Start difference. First operand 1029 states and 2037 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:51,836 INFO L93 Difference]: Finished difference Result 2019 states and 3995 transitions. [2021-07-09 18:06:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:06:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:51,839 INFO L225 Difference]: With dead ends: 2019 [2021-07-09 18:06:51,839 INFO L226 Difference]: Without dead ends: 1805 [2021-07-09 18:06:51,839 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 910.0ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:06:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-07-09 18:06:51,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1140. [2021-07-09 18:06:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.9675153643546972) internal successors, (2241), 1139 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2241 transitions. [2021-07-09 18:06:51,851 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2241 transitions. Word has length 35 [2021-07-09 18:06:51,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:51,851 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 2241 transitions. [2021-07-09 18:06:51,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:51,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2241 transitions. [2021-07-09 18:06:51,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:51,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:51,853 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:52,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:52,056 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:52,056 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-07-09 18:06:52,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:52,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396444728] [2021-07-09 18:06:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:52,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:52,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396444728] [2021-07-09 18:06:52,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396444728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:52,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662434496] [2021-07-09 18:06:52,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:52,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:52,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:52,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:52,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:52,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:52,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:52,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:52,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:52,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:52,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662434496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:52,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:52,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-09 18:06:52,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273593422] [2021-07-09 18:06:52,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:06:52,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:52,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:06:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:52,611 INFO L87 Difference]: Start difference. First operand 1140 states and 2241 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:52,860 INFO L93 Difference]: Finished difference Result 2038 states and 4167 transitions. [2021-07-09 18:06:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:06:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:52,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:52,863 INFO L225 Difference]: With dead ends: 2038 [2021-07-09 18:06:52,863 INFO L226 Difference]: Without dead ends: 1919 [2021-07-09 18:06:52,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-07-09 18:06:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1155. [2021-07-09 18:06:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.9679376083188909) internal successors, (2271), 1154 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2271 transitions. [2021-07-09 18:06:52,889 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2271 transitions. Word has length 35 [2021-07-09 18:06:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:52,889 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2271 transitions. [2021-07-09 18:06:52,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2271 transitions. [2021-07-09 18:06:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:52,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:52,890 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:53,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:53,105 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:53,105 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-07-09 18:06:53,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:53,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005567349] [2021-07-09 18:06:53,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:53,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:53,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005567349] [2021-07-09 18:06:53,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005567349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:53,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270943939] [2021-07-09 18:06:53,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:53,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:06:53,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:53,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-09 18:06:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:53,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:53,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 34 [2021-07-09 18:06:53,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:53,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:53,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:53,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:3 [2021-07-09 18:06:53,779 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:53,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270943939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:53,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:53,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-07-09 18:06:53,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028199408] [2021-07-09 18:06:53,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:06:53,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:06:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:06:53,780 INFO L87 Difference]: Start difference. First operand 1155 states and 2271 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:54,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:54,349 INFO L93 Difference]: Finished difference Result 1927 states and 3858 transitions. [2021-07-09 18:06:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:06:54,350 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:54,352 INFO L225 Difference]: With dead ends: 1927 [2021-07-09 18:06:54,352 INFO L226 Difference]: Without dead ends: 1781 [2021-07-09 18:06:54,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 725.2ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:06:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-07-09 18:06:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1224. [2021-07-09 18:06:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9754701553556828) internal successors, (2416), 1223 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2416 transitions. [2021-07-09 18:06:54,365 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2416 transitions. Word has length 35 [2021-07-09 18:06:54,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:54,365 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2416 transitions. [2021-07-09 18:06:54,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2416 transitions. [2021-07-09 18:06:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:54,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:54,366 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:54,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:06:54,581 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:54,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:54,581 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-07-09 18:06:54,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:54,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621521715] [2021-07-09 18:06:54,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:54,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:54,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621521715] [2021-07-09 18:06:54,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621521715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:54,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540015759] [2021-07-09 18:06:54,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:54,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:06:54,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:54,816 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:55,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:55,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:55,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:55,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:55,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:55,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:55,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:55,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540015759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:55,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:55,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-07-09 18:06:55,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315948721] [2021-07-09 18:06:55,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:06:55,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:55,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:06:55,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:55,112 INFO L87 Difference]: Start difference. First operand 1224 states and 2416 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-07-09 18:06:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:55,310 INFO L93 Difference]: Finished difference Result 2191 states and 4418 transitions. [2021-07-09 18:06:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:06:55,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 35 [2021-07-09 18:06:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:55,320 INFO L225 Difference]: With dead ends: 2191 [2021-07-09 18:06:55,320 INFO L226 Difference]: Without dead ends: 2131 [2021-07-09 18:06:55,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-07-09 18:06:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1191. [2021-07-09 18:06:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-07-09 18:06:55,334 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-07-09 18:06:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:55,334 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-07-09 18:06:55,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-07-09 18:06:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-07-09 18:06:55,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:55,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:55,335 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:55,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:55,541 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-07-09 18:06:55,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:55,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475091491] [2021-07-09 18:06:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:55,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:55,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475091491] [2021-07-09 18:06:55,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475091491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069611199] [2021-07-09 18:06:55,745 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 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 [2021-07-09 18:06:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:55,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:55,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:56,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:56,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:56,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:56,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:56,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:56,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:56,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069611199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:56,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:56,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-09 18:06:56,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062366403] [2021-07-09 18:06:56,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:06:56,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:06:56,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:06:56,082 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-07-09 18:06:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:56,309 INFO L93 Difference]: Finished difference Result 1992 states and 4014 transitions. [2021-07-09 18:06:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:06:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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 35 [2021-07-09 18:06:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:56,312 INFO L225 Difference]: With dead ends: 1992 [2021-07-09 18:06:56,312 INFO L226 Difference]: Without dead ends: 1936 [2021-07-09 18:06:56,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:06:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-07-09 18:06:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1191. [2021-07-09 18:06:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-07-09 18:06:56,325 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-07-09 18:06:56,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:56,326 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-07-09 18:06:56,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 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) [2021-07-09 18:06:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-07-09 18:06:56,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 18:06:56,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:56,327 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:56,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-09 18:06:56,543 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:56,543 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-07-09 18:06:56,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:56,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749445868] [2021-07-09 18:06:56,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:56,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:56,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749445868] [2021-07-09 18:06:56,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749445868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:56,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217670880] [2021-07-09 18:06:56,755 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 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 [2021-07-09 18:06:56,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:56,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:56,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:57,005 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-07-09 18:06:57,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:57,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:57,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:57,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:57,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-07-09 18:06:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:57,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217670880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:57,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:57,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-07-09 18:06:57,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445638030] [2021-07-09 18:06:57,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:06:57,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:57,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:06:57,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:57,018 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:57,239 INFO L93 Difference]: Finished difference Result 1629 states and 3230 transitions. [2021-07-09 18:06:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:06:57,239 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 18:06:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:57,241 INFO L225 Difference]: With dead ends: 1629 [2021-07-09 18:06:57,241 INFO L226 Difference]: Without dead ends: 1614 [2021-07-09 18:06:57,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-09 18:06:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1198. [2021-07-09 18:06:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.9724310776942355) internal successors, (2361), 1197 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2361 transitions. [2021-07-09 18:06:57,253 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2361 transitions. Word has length 35 [2021-07-09 18:06:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:57,253 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2361 transitions. [2021-07-09 18:06:57,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2361 transitions. [2021-07-09 18:06:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-09 18:06:57,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:57,255 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:57,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:06:57,455 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-07-09 18:06:57,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:57,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823092043] [2021-07-09 18:06:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:57,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:57,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823092043] [2021-07-09 18:06:57,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823092043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:57,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081062308] [2021-07-09 18:06:57,493 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 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 [2021-07-09 18:06:57,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:06:57,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:57,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:06:57,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:57,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081062308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:57,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:57,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 18:06:57,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645190862] [2021-07-09 18:06:57,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:06:57,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:57,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:06:57,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:06:57,575 INFO L87 Difference]: Start difference. First operand 1198 states and 2361 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-07-09 18:06:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:57,605 INFO L93 Difference]: Finished difference Result 1523 states and 3015 transitions. [2021-07-09 18:06:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:06:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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 36 [2021-07-09 18:06:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:57,607 INFO L225 Difference]: With dead ends: 1523 [2021-07-09 18:06:57,607 INFO L226 Difference]: Without dead ends: 1516 [2021-07-09 18:06:57,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:06:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-07-09 18:06:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1247. [2021-07-09 18:06:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.9839486356340288) internal successors, (2472), 1246 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2472 transitions. [2021-07-09 18:06:57,627 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2472 transitions. Word has length 36 [2021-07-09 18:06:57,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:57,627 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 2472 transitions. [2021-07-09 18:06:57,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 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) [2021-07-09 18:06:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2472 transitions. [2021-07-09 18:06:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 18:06:57,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:57,628 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:57,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 18:06:57,845 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:57,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:57,845 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-07-09 18:06:57,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:57,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65998316] [2021-07-09 18:06:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:58,034 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:58,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:58,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65998316] [2021-07-09 18:06:58,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65998316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199866590] [2021-07-09 18:06:58,034 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 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 [2021-07-09 18:06:58,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:58,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:58,060 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-07-09 18:06:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:58,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:06:58,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:06:58,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-07-09 18:06:58,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:06:58,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:06:58,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-07-09 18:06:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199866590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:58,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:58,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-07-09 18:06:58,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196948960] [2021-07-09 18:06:58,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:06:58,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:58,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:06:58,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:06:58,386 INFO L87 Difference]: Start difference. First operand 1247 states and 2472 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:59,096 INFO L93 Difference]: Finished difference Result 2817 states and 5721 transitions. [2021-07-09 18:06:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:06:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 18:06:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:59,099 INFO L225 Difference]: With dead ends: 2817 [2021-07-09 18:06:59,099 INFO L226 Difference]: Without dead ends: 2497 [2021-07-09 18:06:59,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 767.4ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:06:59,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-07-09 18:06:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1341. [2021-07-09 18:06:59,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.983582089552239) internal successors, (2658), 1340 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:59,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2658 transitions. [2021-07-09 18:06:59,114 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2658 transitions. Word has length 38 [2021-07-09 18:06:59,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:59,114 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 2658 transitions. [2021-07-09 18:06:59,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:59,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2658 transitions. [2021-07-09 18:06:59,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:06:59,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:59,115 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:59,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-09 18:06:59,316 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:59,324 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-07-09 18:06:59,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:59,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279491952] [2021-07-09 18:06:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:59,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:59,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:59,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279491952] [2021-07-09 18:06:59,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279491952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:59,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918226302] [2021-07-09 18:06:59,547 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 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 [2021-07-09 18:06:59,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:06:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:59,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:06:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:00,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:00,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:00,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-07-09 18:07:00,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:00,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:00,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:00,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-07-09 18:07:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918226302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:00,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:00,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-07-09 18:07:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362784060] [2021-07-09 18:07:00,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:07:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:07:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:07:00,164 INFO L87 Difference]: Start difference. First operand 1341 states and 2658 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:01,733 INFO L93 Difference]: Finished difference Result 2819 states and 5680 transitions. [2021-07-09 18:07:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:07:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:01,737 INFO L225 Difference]: With dead ends: 2819 [2021-07-09 18:07:01,737 INFO L226 Difference]: Without dead ends: 2609 [2021-07-09 18:07:01,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1552.1ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:07:01,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-07-09 18:07:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1437. [2021-07-09 18:07:01,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 1.9700557103064067) internal successors, (2829), 1436 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2829 transitions. [2021-07-09 18:07:01,760 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2829 transitions. Word has length 39 [2021-07-09 18:07:01,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:01,761 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 2829 transitions. [2021-07-09 18:07:01,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2829 transitions. [2021-07-09 18:07:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:01,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:01,762 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:01,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:01,963 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-07-09 18:07:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511316461] [2021-07-09 18:07:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:01,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:02,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:02,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511316461] [2021-07-09 18:07:02,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511316461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739161308] [2021-07-09 18:07:02,188 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 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 [2021-07-09 18:07:02,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:07:02,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:02,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:02,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:02,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:02,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:02,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:02,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:02,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:02,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:02,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:02,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:02,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739161308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:02,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:02,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-09 18:07:02,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460826612] [2021-07-09 18:07:02,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:07:02,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:02,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:07:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:02,737 INFO L87 Difference]: Start difference. First operand 1437 states and 2829 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:03,122 INFO L93 Difference]: Finished difference Result 2311 states and 4610 transitions. [2021-07-09 18:07:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:07:03,122 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:03,124 INFO L225 Difference]: With dead ends: 2311 [2021-07-09 18:07:03,124 INFO L226 Difference]: Without dead ends: 2290 [2021-07-09 18:07:03,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-07-09 18:07:03,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1458. [2021-07-09 18:07:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 1.969114619080302) internal successors, (2869), 1457 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2869 transitions. [2021-07-09 18:07:03,140 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2869 transitions. Word has length 39 [2021-07-09 18:07:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:03,140 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 2869 transitions. [2021-07-09 18:07:03,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2869 transitions. [2021-07-09 18:07:03,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:03,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:03,142 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:03,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 18:07:03,357 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-07-09 18:07:03,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:03,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150117800] [2021-07-09 18:07:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:03,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:03,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150117800] [2021-07-09 18:07:03,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150117800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:03,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180643588] [2021-07-09 18:07:03,572 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 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 [2021-07-09 18:07:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:03,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:04,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:04,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:04,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:04,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:04,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:04,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:04,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:04,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:04,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:04,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180643588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:04,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:04,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-07-09 18:07:04,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855745362] [2021-07-09 18:07:04,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:07:04,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:04,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:07:04,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:07:04,087 INFO L87 Difference]: Start difference. First operand 1458 states and 2869 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:04,712 INFO L93 Difference]: Finished difference Result 2400 states and 4757 transitions. [2021-07-09 18:07:04,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:07:04,712 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:04,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:04,715 INFO L225 Difference]: With dead ends: 2400 [2021-07-09 18:07:04,715 INFO L226 Difference]: Without dead ends: 2109 [2021-07-09 18:07:04,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 785.5ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-07-09 18:07:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1497. [2021-07-09 18:07:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.9545454545454546) internal successors, (2924), 1496 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:04,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2924 transitions. [2021-07-09 18:07:04,730 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2924 transitions. Word has length 39 [2021-07-09 18:07:04,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:04,731 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 2924 transitions. [2021-07-09 18:07:04,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:04,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2924 transitions. [2021-07-09 18:07:04,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:04,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:04,732 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:04,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:04,948 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:04,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:04,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-07-09 18:07:04,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:04,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350033508] [2021-07-09 18:07:04,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:05,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350033508] [2021-07-09 18:07:05,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350033508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:05,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961583025] [2021-07-09 18:07:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:07:05,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:05,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:05,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:05,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:05,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:05,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:05,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:05,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:05,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:05,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:05,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961583025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:05,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:05,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-09 18:07:05,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854047265] [2021-07-09 18:07:05,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:07:05,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:05,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:07:05,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:05,706 INFO L87 Difference]: Start difference. First operand 1497 states and 2924 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:06,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:06,028 INFO L93 Difference]: Finished difference Result 3106 states and 6326 transitions. [2021-07-09 18:07:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:07:06,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:06,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:06,032 INFO L225 Difference]: With dead ends: 3106 [2021-07-09 18:07:06,032 INFO L226 Difference]: Without dead ends: 2973 [2021-07-09 18:07:06,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:06,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-07-09 18:07:06,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1152. [2021-07-09 18:07:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.9791485664639443) internal successors, (2278), 1151 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2278 transitions. [2021-07-09 18:07:06,048 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2278 transitions. Word has length 39 [2021-07-09 18:07:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:06,048 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2278 transitions. [2021-07-09 18:07:06,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:06,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2278 transitions. [2021-07-09 18:07:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:06,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:06,049 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:06,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-09 18:07:06,265 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:06,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-07-09 18:07:06,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:06,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636280413] [2021-07-09 18:07:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:06,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:06,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636280413] [2021-07-09 18:07:06,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636280413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:06,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463549179] [2021-07-09 18:07:06,484 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 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 [2021-07-09 18:07:06,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:07:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:06,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 18:07:06,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:07,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:07,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:07,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:07,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:07,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:07,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:07,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:07,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:07,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:07,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:07,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:07,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:07,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463549179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:07,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:07,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-09 18:07:07,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727190636] [2021-07-09 18:07:07,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:07:07,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:07:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:07,042 INFO L87 Difference]: Start difference. First operand 1152 states and 2278 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:07,430 INFO L93 Difference]: Finished difference Result 2674 states and 5413 transitions. [2021-07-09 18:07:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:07:07,431 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:07,433 INFO L225 Difference]: With dead ends: 2674 [2021-07-09 18:07:07,434 INFO L226 Difference]: Without dead ends: 2391 [2021-07-09 18:07:07,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-07-09 18:07:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1314. [2021-07-09 18:07:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 1.9695354150799695) internal successors, (2586), 1313 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2586 transitions. [2021-07-09 18:07:07,448 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2586 transitions. Word has length 39 [2021-07-09 18:07:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:07,448 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 2586 transitions. [2021-07-09 18:07:07,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2586 transitions. [2021-07-09 18:07:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:07,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:07,449 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:07,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:07,650 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:07,650 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-07-09 18:07:07,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:07,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020139659] [2021-07-09 18:07:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:07,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:07,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020139659] [2021-07-09 18:07:07,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020139659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:07,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832623944] [2021-07-09 18:07:07,889 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 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 [2021-07-09 18:07:07,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:07,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:07,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:08,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:08,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:08,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:08,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:08,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:08,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:08,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:08,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:08,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:08,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:08,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832623944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:08,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:08,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-09 18:07:08,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658996036] [2021-07-09 18:07:08,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:07:08,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:07:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:08,445 INFO L87 Difference]: Start difference. First operand 1314 states and 2586 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:08,798 INFO L93 Difference]: Finished difference Result 2628 states and 5306 transitions. [2021-07-09 18:07:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:07:08,798 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:08,800 INFO L225 Difference]: With dead ends: 2628 [2021-07-09 18:07:08,800 INFO L226 Difference]: Without dead ends: 2562 [2021-07-09 18:07:08,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 609.7ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:08,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-07-09 18:07:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1257. [2021-07-09 18:07:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.9729299363057324) internal successors, (2478), 1256 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2478 transitions. [2021-07-09 18:07:08,815 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2478 transitions. Word has length 39 [2021-07-09 18:07:08,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:08,815 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 2478 transitions. [2021-07-09 18:07:08,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2478 transitions. [2021-07-09 18:07:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:08,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:08,817 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:09,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 18:07:09,029 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:09,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:09,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-07-09 18:07:09,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:09,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179002214] [2021-07-09 18:07:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:09,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:09,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:09,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179002214] [2021-07-09 18:07:09,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179002214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:09,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539244710] [2021-07-09 18:07:09,288 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 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 [2021-07-09 18:07:09,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:07:09,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:09,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:07:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:09,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:09,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:09,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:09,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:09,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:09,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:09,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:09,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:09,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:09,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:09,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539244710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:09,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:09,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-09 18:07:09,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401033290] [2021-07-09 18:07:09,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:07:09,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:07:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:09,824 INFO L87 Difference]: Start difference. First operand 1257 states and 2478 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:10,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:10,224 INFO L93 Difference]: Finished difference Result 1841 states and 3650 transitions. [2021-07-09 18:07:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:07:10,224 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:10,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:10,226 INFO L225 Difference]: With dead ends: 1841 [2021-07-09 18:07:10,226 INFO L226 Difference]: Without dead ends: 1810 [2021-07-09 18:07:10,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:07:10,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-07-09 18:07:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1383. [2021-07-09 18:07:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.960202604920405) internal successors, (2709), 1382 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2709 transitions. [2021-07-09 18:07:10,239 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2709 transitions. Word has length 39 [2021-07-09 18:07:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:10,239 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 2709 transitions. [2021-07-09 18:07:10,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2709 transitions. [2021-07-09 18:07:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:10,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:10,241 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:10,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:10,441 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1491350523, now seen corresponding path program 60 times [2021-07-09 18:07:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:10,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281118767] [2021-07-09 18:07:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:10,630 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 18:07:10,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:10,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281118767] [2021-07-09 18:07:10,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281118767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:10,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129382896] [2021-07-09 18:07:10,630 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 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 [2021-07-09 18:07:10,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:07:10,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:10,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:10,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:11,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:11,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:11,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:11,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:11,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:11,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:11,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:11,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:11,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129382896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:11,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:11,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-07-09 18:07:11,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251181357] [2021-07-09 18:07:11,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:07:11,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:07:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:07:11,179 INFO L87 Difference]: Start difference. First operand 1383 states and 2709 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:11,787 INFO L93 Difference]: Finished difference Result 2027 states and 4033 transitions. [2021-07-09 18:07:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:07:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:11,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:11,790 INFO L225 Difference]: With dead ends: 2027 [2021-07-09 18:07:11,790 INFO L226 Difference]: Without dead ends: 1995 [2021-07-09 18:07:11,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 853.7ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:07:11,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-07-09 18:07:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1166. [2021-07-09 18:07:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.9630901287553648) internal successors, (2287), 1165 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2287 transitions. [2021-07-09 18:07:11,801 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2287 transitions. Word has length 39 [2021-07-09 18:07:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:11,801 INFO L482 AbstractCegarLoop]: Abstraction has 1166 states and 2287 transitions. [2021-07-09 18:07:11,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2287 transitions. [2021-07-09 18:07:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:11,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:11,802 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:12,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:07:12,003 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:12,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:12,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 61 times [2021-07-09 18:07:12,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:12,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494074312] [2021-07-09 18:07:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:12,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:12,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494074312] [2021-07-09 18:07:12,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494074312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:12,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801460115] [2021-07-09 18:07:12,251 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 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 [2021-07-09 18:07:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:12,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:12,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:12,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:12,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:12,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:12,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:12,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:12,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:12,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:12,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:12,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:12,795 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:12,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801460115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:12,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:12,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-07-09 18:07:12,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641011103] [2021-07-09 18:07:12,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:07:12,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:12,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:07:12,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:07:12,796 INFO L87 Difference]: Start difference. First operand 1166 states and 2287 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:13,378 INFO L93 Difference]: Finished difference Result 1981 states and 3920 transitions. [2021-07-09 18:07:13,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:07:13,378 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:13,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:13,380 INFO L225 Difference]: With dead ends: 1981 [2021-07-09 18:07:13,380 INFO L226 Difference]: Without dead ends: 1696 [2021-07-09 18:07:13,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 817.4ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:07:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-07-09 18:07:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1224. [2021-07-09 18:07:13,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9574816026165167) internal successors, (2394), 1223 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2394 transitions. [2021-07-09 18:07:13,391 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2394 transitions. Word has length 39 [2021-07-09 18:07:13,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:13,391 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2394 transitions. [2021-07-09 18:07:13,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2394 transitions. [2021-07-09 18:07:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:13,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:13,392 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:13,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:13,593 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:13,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 62 times [2021-07-09 18:07:13,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:13,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917239948] [2021-07-09 18:07:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:13,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:13,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917239948] [2021-07-09 18:07:13,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917239948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:13,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62779110] [2021-07-09 18:07:13,830 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 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 [2021-07-09 18:07:13,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:13,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:13,855 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:13,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:14,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:14,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:14,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:14,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:14,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:14,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:14,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:14,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:14,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62779110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:14,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:14,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-09 18:07:14,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175234946] [2021-07-09 18:07:14,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:07:14,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:14,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:07:14,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:14,379 INFO L87 Difference]: Start difference. First operand 1224 states and 2394 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:14,706 INFO L93 Difference]: Finished difference Result 2349 states and 4815 transitions. [2021-07-09 18:07:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:07:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:14,709 INFO L225 Difference]: With dead ends: 2349 [2021-07-09 18:07:14,709 INFO L226 Difference]: Without dead ends: 2230 [2021-07-09 18:07:14,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:14,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-07-09 18:07:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1230. [2021-07-09 18:07:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.9576891781936534) internal successors, (2406), 1229 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2406 transitions. [2021-07-09 18:07:14,721 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2406 transitions. Word has length 39 [2021-07-09 18:07:14,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:14,721 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2406 transitions. [2021-07-09 18:07:14,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:14,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2406 transitions. [2021-07-09 18:07:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:14,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:14,722 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:14,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:07:14,923 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 63 times [2021-07-09 18:07:14,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:14,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649848120] [2021-07-09 18:07:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:15,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:15,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649848120] [2021-07-09 18:07:15,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649848120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:15,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501143447] [2021-07-09 18:07:15,138 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 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 [2021-07-09 18:07:15,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:07:15,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:15,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:15,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:15,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:15,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:15,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:15,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:15,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:15,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:15,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:15,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:15,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:15,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501143447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:15,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:15,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-07-09 18:07:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220060091] [2021-07-09 18:07:15,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:07:15,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:15,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:07:15,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:07:15,699 INFO L87 Difference]: Start difference. First operand 1230 states and 2406 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:16,002 INFO L93 Difference]: Finished difference Result 2175 states and 4323 transitions. [2021-07-09 18:07:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:07:16,002 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:16,004 INFO L225 Difference]: With dead ends: 2175 [2021-07-09 18:07:16,004 INFO L226 Difference]: Without dead ends: 1948 [2021-07-09 18:07:16,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:16,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-07-09 18:07:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1359. [2021-07-09 18:07:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 1.9499263622974963) internal successors, (2648), 1358 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2648 transitions. [2021-07-09 18:07:16,016 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2648 transitions. Word has length 39 [2021-07-09 18:07:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:16,016 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 2648 transitions. [2021-07-09 18:07:16,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2648 transitions. [2021-07-09 18:07:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:16,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:16,018 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:16,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:07:16,218 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 64 times [2021-07-09 18:07:16,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:16,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373709871] [2021-07-09 18:07:16,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:16,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:16,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373709871] [2021-07-09 18:07:16,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373709871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:16,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068101082] [2021-07-09 18:07:16,443 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 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 [2021-07-09 18:07:16,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:16,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:16,467 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:16,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:16,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:16,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:16,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:16,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:16,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:16,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:16,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:16,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:16,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068101082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:16,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:16,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-07-09 18:07:16,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250887353] [2021-07-09 18:07:16,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:07:16,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:16,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:07:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:16,987 INFO L87 Difference]: Start difference. First operand 1359 states and 2648 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:17,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:17,232 INFO L93 Difference]: Finished difference Result 2695 states and 5412 transitions. [2021-07-09 18:07:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:07:17,233 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:17,235 INFO L225 Difference]: With dead ends: 2695 [2021-07-09 18:07:17,235 INFO L226 Difference]: Without dead ends: 2635 [2021-07-09 18:07:17,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:17,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-07-09 18:07:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1326. [2021-07-09 18:07:17,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.9449056603773585) internal successors, (2577), 1325 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:17,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2577 transitions. [2021-07-09 18:07:17,251 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2577 transitions. Word has length 39 [2021-07-09 18:07:17,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:17,251 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 2577 transitions. [2021-07-09 18:07:17,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2577 transitions. [2021-07-09 18:07:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:17,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:17,253 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:17,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:07:17,453 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 65 times [2021-07-09 18:07:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506929640] [2021-07-09 18:07:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:17,695 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:17,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:17,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506929640] [2021-07-09 18:07:17,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506929640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:17,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720804708] [2021-07-09 18:07:17,696 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 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 [2021-07-09 18:07:17,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:07:17,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:17,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 18:07:17,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:18,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:18,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:18,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:18,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:18,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:18,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:18,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:18,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:18,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:134, output treesize:7 [2021-07-09 18:07:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:18,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720804708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:18,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:18,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-07-09 18:07:18,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796457758] [2021-07-09 18:07:18,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:07:18,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:07:18,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:18,279 INFO L87 Difference]: Start difference. First operand 1326 states and 2577 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:18,608 INFO L93 Difference]: Finished difference Result 2530 states and 5090 transitions. [2021-07-09 18:07:18,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:07:18,609 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:18,611 INFO L225 Difference]: With dead ends: 2530 [2021-07-09 18:07:18,611 INFO L226 Difference]: Without dead ends: 2290 [2021-07-09 18:07:18,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-07-09 18:07:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1371. [2021-07-09 18:07:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.9445255474452554) internal successors, (2664), 1370 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2664 transitions. [2021-07-09 18:07:18,625 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2664 transitions. Word has length 39 [2021-07-09 18:07:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:18,625 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 2664 transitions. [2021-07-09 18:07:18,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2664 transitions. [2021-07-09 18:07:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:18,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:18,626 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:18,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:18,827 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:18,827 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 66 times [2021-07-09 18:07:18,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:18,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193662671] [2021-07-09 18:07:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:19,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193662671] [2021-07-09 18:07:19,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193662671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:19,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324238271] [2021-07-09 18:07:19,070 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 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 [2021-07-09 18:07:19,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:07:19,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:19,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:19,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:19,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:19,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:19,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:19,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:19,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:19,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:19,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:19,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:19,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:19,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324238271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:19,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:19,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-07-09 18:07:19,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439637738] [2021-07-09 18:07:19,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:07:19,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:19,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:07:19,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:19,660 INFO L87 Difference]: Start difference. First operand 1371 states and 2664 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:19,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:19,992 INFO L93 Difference]: Finished difference Result 1989 states and 3938 transitions. [2021-07-09 18:07:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:07:19,992 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:19,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:19,994 INFO L225 Difference]: With dead ends: 1989 [2021-07-09 18:07:19,994 INFO L226 Difference]: Without dead ends: 1967 [2021-07-09 18:07:19,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-07-09 18:07:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1374. [2021-07-09 18:07:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 1.9446467589220684) internal successors, (2670), 1373 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2670 transitions. [2021-07-09 18:07:20,007 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2670 transitions. Word has length 39 [2021-07-09 18:07:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:20,007 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 2670 transitions. [2021-07-09 18:07:20,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2670 transitions. [2021-07-09 18:07:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:20,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:20,009 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:20,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:20,209 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 67 times [2021-07-09 18:07:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:20,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825328637] [2021-07-09 18:07:20,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:20,447 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:20,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825328637] [2021-07-09 18:07:20,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825328637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:20,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750108986] [2021-07-09 18:07:20,447 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 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 [2021-07-09 18:07:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:20,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:20,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:20,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:20,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:20,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:20,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:20,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:20,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:20,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:20,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:20,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750108986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:20,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:20,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-07-09 18:07:20,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24416422] [2021-07-09 18:07:20,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:07:20,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:20,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:07:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:20,981 INFO L87 Difference]: Start difference. First operand 1374 states and 2670 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:21,406 INFO L93 Difference]: Finished difference Result 3158 states and 6442 transitions. [2021-07-09 18:07:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:07:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:21,409 INFO L225 Difference]: With dead ends: 3158 [2021-07-09 18:07:21,409 INFO L226 Difference]: Without dead ends: 3018 [2021-07-09 18:07:21,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-07-09 18:07:21,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 795. [2021-07-09 18:07:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.013853904282116) internal successors, (1599), 794 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1599 transitions. [2021-07-09 18:07:21,422 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1599 transitions. Word has length 39 [2021-07-09 18:07:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:21,422 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1599 transitions. [2021-07-09 18:07:21,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,422 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1599 transitions. [2021-07-09 18:07:21,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:21,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:21,423 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:21,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:21,624 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:21,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 68 times [2021-07-09 18:07:21,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:21,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315397233] [2021-07-09 18:07:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:21,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:21,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315397233] [2021-07-09 18:07:21,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315397233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:21,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960054090] [2021-07-09 18:07:21,877 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 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 [2021-07-09 18:07:21,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:21,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:21,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:22,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:22,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:22,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:22,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:22,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:22,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:22,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:22,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960054090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:22,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:22,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-07-09 18:07:22,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338203155] [2021-07-09 18:07:22,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:07:22,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:22,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:07:22,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:22,419 INFO L87 Difference]: Start difference. First operand 795 states and 1599 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:22,870 INFO L93 Difference]: Finished difference Result 2070 states and 4261 transitions. [2021-07-09 18:07:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:07:22,870 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:22,872 INFO L225 Difference]: With dead ends: 2070 [2021-07-09 18:07:22,872 INFO L226 Difference]: Without dead ends: 2009 [2021-07-09 18:07:22,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-07-09 18:07:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 786. [2021-07-09 18:07:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.0140127388535034) internal successors, (1581), 785 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1581 transitions. [2021-07-09 18:07:22,882 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1581 transitions. Word has length 39 [2021-07-09 18:07:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:22,882 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1581 transitions. [2021-07-09 18:07:22,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1581 transitions. [2021-07-09 18:07:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:22,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:22,883 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:23,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-09 18:07:23,084 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:23,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:23,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 69 times [2021-07-09 18:07:23,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:23,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259995557] [2021-07-09 18:07:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:23,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259995557] [2021-07-09 18:07:23,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259995557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616206726] [2021-07-09 18:07:23,329 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 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 [2021-07-09 18:07:23,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:07:23,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:23,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:23,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:23,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:23,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:23,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:23,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:23,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:23,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:23,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:23,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:23,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:23,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616206726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:23,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:23,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-07-09 18:07:23,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113858211] [2021-07-09 18:07:23,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:07:23,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:23,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:07:23,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:07:23,871 INFO L87 Difference]: Start difference. First operand 786 states and 1581 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:24,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:24,552 INFO L93 Difference]: Finished difference Result 1866 states and 3843 transitions. [2021-07-09 18:07:24,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:07:24,552 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:07:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:24,554 INFO L225 Difference]: With dead ends: 1866 [2021-07-09 18:07:24,554 INFO L226 Difference]: Without dead ends: 1802 [2021-07-09 18:07:24,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 608.0ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:07:24,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-07-09 18:07:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 792. [2021-07-09 18:07:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 2.013906447534766) internal successors, (1593), 791 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1593 transitions. [2021-07-09 18:07:24,564 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1593 transitions. Word has length 39 [2021-07-09 18:07:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:24,565 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 1593 transitions. [2021-07-09 18:07:24,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1593 transitions. [2021-07-09 18:07:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:24,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:24,566 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:24,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:24,766 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:24,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 70 times [2021-07-09 18:07:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:24,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661542315] [2021-07-09 18:07:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:24,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:24,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661542315] [2021-07-09 18:07:24,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661542315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:24,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089972713] [2021-07-09 18:07:24,996 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 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 [2021-07-09 18:07:25,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:25,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:07:25,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:25,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:25,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:25,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:25,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:07:25,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:25,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:25,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:25,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:07:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:25,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089972713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:25,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:25,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-07-09 18:07:25,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777430566] [2021-07-09 18:07:25,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:07:25,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:25,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:07:25,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:07:25,483 INFO L87 Difference]: Start difference. First operand 792 states and 1593 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:07:26,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:26,061 INFO L93 Difference]: Finished difference Result 1711 states and 3435 transitions. [2021-07-09 18:07:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:07:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 39 [2021-07-09 18:07:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:26,074 INFO L225 Difference]: With dead ends: 1711 [2021-07-09 18:07:26,074 INFO L226 Difference]: Without dead ends: 1381 [2021-07-09 18:07:26,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:07:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-07-09 18:07:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 885. [2021-07-09 18:07:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.005656108597285) internal successors, (1773), 884 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:26,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1773 transitions. [2021-07-09 18:07:26,082 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1773 transitions. Word has length 39 [2021-07-09 18:07:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:26,082 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1773 transitions. [2021-07-09 18:07:26,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:07:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1773 transitions. [2021-07-09 18:07:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:07:26,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:26,083 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:26,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:26,285 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 71 times [2021-07-09 18:07:26,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:26,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199727694] [2021-07-09 18:07:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:26,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199727694] [2021-07-09 18:07:26,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199727694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:26,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487119122] [2021-07-09 18:07:26,553 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 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 [2021-07-09 18:07:26,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:07:26,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:26,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 56 conjunts are in the unsatisfiable core [2021-07-09 18:07:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:33,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:33,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:33,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:33,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:07:33,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:07:33,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 38 [2021-07-09 18:07:33,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:07:33,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:07:33,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:07:33,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:3 [2021-07-09 18:07:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487119122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:33,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:33,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-07-09 18:07:33,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100720921] [2021-07-09 18:07:33,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:07:33,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:07:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=961, Unknown=2, NotChecked=0, Total=1056 [2021-07-09 18:07:33,081 INFO L87 Difference]: Start difference. First operand 885 states and 1773 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:46,721 INFO L93 Difference]: Finished difference Result 2776 states and 5550 transitions. [2021-07-09 18:08:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:08:46,721 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:08:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:46,724 INFO L225 Difference]: With dead ends: 2776 [2021-07-09 18:08:46,724 INFO L226 Difference]: Without dead ends: 2481 [2021-07-09 18:08:46,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 36650.6ms TimeCoverageRelationStatistics Valid=392, Invalid=5297, Unknown=11, NotChecked=0, Total=5700 [2021-07-09 18:08:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-07-09 18:08:46,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1028. [2021-07-09 18:08:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.0136319376825704) internal successors, (2068), 1027 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2068 transitions. [2021-07-09 18:08:46,737 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2068 transitions. Word has length 39 [2021-07-09 18:08:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:46,737 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2068 transitions. [2021-07-09 18:08:46,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2068 transitions. [2021-07-09 18:08:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:46,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:46,738 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:46,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:46,938 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 72 times [2021-07-09 18:08:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:46,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195892499] [2021-07-09 18:08:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:47,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:47,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195892499] [2021-07-09 18:08:47,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195892499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:47,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558562799] [2021-07-09 18:08:47,215 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 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 [2021-07-09 18:08:47,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:08:47,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:47,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:08:47,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:47,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:47,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:47,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:08:47,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:47,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:47,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:47,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:08:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:47,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558562799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:47,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:47,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-07-09 18:08:47,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977878108] [2021-07-09 18:08:47,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:08:47,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:47,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:08:47,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:08:47,735 INFO L87 Difference]: Start difference. First operand 1028 states and 2068 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2021-07-09 18:08:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:48,024 INFO L93 Difference]: Finished difference Result 1646 states and 3342 transitions. [2021-07-09 18:08:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:08:48,025 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 39 [2021-07-09 18:08:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:48,026 INFO L225 Difference]: With dead ends: 1646 [2021-07-09 18:08:48,026 INFO L226 Difference]: Without dead ends: 1624 [2021-07-09 18:08:48,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:08:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-07-09 18:08:48,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1031. [2021-07-09 18:08:48,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.013592233009709) internal successors, (2074), 1030 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:48,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2074 transitions. [2021-07-09 18:08:48,039 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2074 transitions. Word has length 39 [2021-07-09 18:08:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:48,039 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2074 transitions. [2021-07-09 18:08:48,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2021-07-09 18:08:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2074 transitions. [2021-07-09 18:08:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:48,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:48,040 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:48,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 18:08:48,241 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 73 times [2021-07-09 18:08:48,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:48,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683577997] [2021-07-09 18:08:48,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:48,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:48,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683577997] [2021-07-09 18:08:48,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683577997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:48,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616996446] [2021-07-09 18:08:48,529 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 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 [2021-07-09 18:08:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:48,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:08:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:49,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:49,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:49,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:49,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:08:49,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:49,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:49,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:49,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:08:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:49,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616996446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:49,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:49,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-07-09 18:08:49,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315398322] [2021-07-09 18:08:49,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:08:49,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:08:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:08:49,036 INFO L87 Difference]: Start difference. First operand 1031 states and 2074 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:49,400 INFO L93 Difference]: Finished difference Result 2173 states and 4427 transitions. [2021-07-09 18:08:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:08:49,400 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:08:49,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:49,403 INFO L225 Difference]: With dead ends: 2173 [2021-07-09 18:08:49,403 INFO L226 Difference]: Without dead ends: 2130 [2021-07-09 18:08:49,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 629.8ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:08:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-07-09 18:08:49,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1070. [2021-07-09 18:08:49,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.0130963517305895) internal successors, (2152), 1069 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2152 transitions. [2021-07-09 18:08:49,414 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2152 transitions. Word has length 39 [2021-07-09 18:08:49,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:49,414 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 2152 transitions. [2021-07-09 18:08:49,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:49,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2152 transitions. [2021-07-09 18:08:49,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:49,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:49,415 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:49,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:49,616 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:49,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 74 times [2021-07-09 18:08:49,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:49,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539633463] [2021-07-09 18:08:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:49,846 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:49,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539633463] [2021-07-09 18:08:49,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539633463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:49,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666823729] [2021-07-09 18:08:49,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:08:49,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:49,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:49,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:08:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:50,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:50,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:50,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:08:50,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:50,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:50,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:50,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:08:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:50,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666823729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:50,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:50,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-07-09 18:08:50,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928835935] [2021-07-09 18:08:50,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:08:50,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:08:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:08:50,281 INFO L87 Difference]: Start difference. First operand 1070 states and 2152 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:50,893 INFO L93 Difference]: Finished difference Result 1889 states and 3781 transitions. [2021-07-09 18:08:50,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:08:50,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:08:50,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:50,895 INFO L225 Difference]: With dead ends: 1889 [2021-07-09 18:08:50,895 INFO L226 Difference]: Without dead ends: 1614 [2021-07-09 18:08:50,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 811.6ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:08:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-09 18:08:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1130. [2021-07-09 18:08:50,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.008857395925598) internal successors, (2268), 1129 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2268 transitions. [2021-07-09 18:08:50,905 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2268 transitions. Word has length 39 [2021-07-09 18:08:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:50,906 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 2268 transitions. [2021-07-09 18:08:50,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2268 transitions. [2021-07-09 18:08:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:50,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:50,907 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:51,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:08:51,107 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:51,108 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 75 times [2021-07-09 18:08:51,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:51,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116576784] [2021-07-09 18:08:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:51,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:51,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116576784] [2021-07-09 18:08:51,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116576784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:51,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261205195] [2021-07-09 18:08:51,328 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 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 [2021-07-09 18:08:51,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:08:51,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:51,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:08:51,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:51,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:51,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:51,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:51,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:51,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-07-09 18:08:51,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:51,947 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-09 18:08:51,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:51,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-07-09 18:08:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:51,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261205195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:51,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:51,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-07-09 18:08:51,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323790086] [2021-07-09 18:08:51,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:08:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:51,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:08:51,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:08:51,957 INFO L87 Difference]: Start difference. First operand 1130 states and 2268 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:53,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:53,207 INFO L93 Difference]: Finished difference Result 2002 states and 3962 transitions. [2021-07-09 18:08:53,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:08:53,208 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:08:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:53,209 INFO L225 Difference]: With dead ends: 2002 [2021-07-09 18:08:53,209 INFO L226 Difference]: Without dead ends: 1688 [2021-07-09 18:08:53,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1300.2ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:08:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-07-09 18:08:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1157. [2021-07-09 18:08:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.0051903114186853) internal successors, (2318), 1156 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2318 transitions. [2021-07-09 18:08:53,220 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2318 transitions. Word has length 39 [2021-07-09 18:08:53,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:53,220 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2318 transitions. [2021-07-09 18:08:53,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:53,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2318 transitions. [2021-07-09 18:08:53,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:53,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:53,222 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:53,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:53,422 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 76 times [2021-07-09 18:08:53,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:53,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521639285] [2021-07-09 18:08:53,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:53,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:53,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521639285] [2021-07-09 18:08:53,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521639285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:53,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656823205] [2021-07-09 18:08:53,650 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 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 [2021-07-09 18:08:53,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:08:53,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:53,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:08:53,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:54,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:54,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:54,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:08:54,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:54,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:54,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:54,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:08:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:54,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656823205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:54,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:54,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-07-09 18:08:54,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345751213] [2021-07-09 18:08:54,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:08:54,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:54,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:08:54,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:08:54,090 INFO L87 Difference]: Start difference. First operand 1157 states and 2318 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:54,728 INFO L93 Difference]: Finished difference Result 2390 states and 4766 transitions. [2021-07-09 18:08:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:08:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:08:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:54,730 INFO L225 Difference]: With dead ends: 2390 [2021-07-09 18:08:54,730 INFO L226 Difference]: Without dead ends: 2089 [2021-07-09 18:08:54,730 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 826.3ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:08:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-09 18:08:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1493. [2021-07-09 18:08:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.9845844504021448) internal successors, (2961), 1492 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2961 transitions. [2021-07-09 18:08:54,744 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2961 transitions. Word has length 39 [2021-07-09 18:08:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:54,744 INFO L482 AbstractCegarLoop]: Abstraction has 1493 states and 2961 transitions. [2021-07-09 18:08:54,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:54,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2961 transitions. [2021-07-09 18:08:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:54,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:54,745 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:54,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:54,946 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:54,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:54,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1471668869, now seen corresponding path program 77 times [2021-07-09 18:08:54,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:54,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541010386] [2021-07-09 18:08:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:55,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541010386] [2021-07-09 18:08:55,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541010386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:55,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125878205] [2021-07-09 18:08:55,160 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 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 [2021-07-09 18:08:55,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:08:55,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:55,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:08:55,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:55,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:55,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:55,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:55,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 48 [2021-07-09 18:08:55,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:55,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:55,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:55,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:135, output treesize:7 [2021-07-09 18:08:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:55,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125878205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:55,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:55,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-09 18:08:55,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697658606] [2021-07-09 18:08:55,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:08:55,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:08:55,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:08:55,891 INFO L87 Difference]: Start difference. First operand 1493 states and 2961 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:58,329 INFO L93 Difference]: Finished difference Result 3509 states and 6960 transitions. [2021-07-09 18:08:58,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:08:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:08:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:58,333 INFO L225 Difference]: With dead ends: 3509 [2021-07-09 18:08:58,333 INFO L226 Difference]: Without dead ends: 3088 [2021-07-09 18:08:58,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2054.0ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:08:58,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-07-09 18:08:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1542. [2021-07-09 18:08:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.9798831927319922) internal successors, (3051), 1541 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 3051 transitions. [2021-07-09 18:08:58,350 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 3051 transitions. Word has length 39 [2021-07-09 18:08:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:58,350 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 3051 transitions. [2021-07-09 18:08:58,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 3051 transitions. [2021-07-09 18:08:58,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:58,352 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:58,352 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:58,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:58,552 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:58,553 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 78 times [2021-07-09 18:08:58,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:58,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640931856] [2021-07-09 18:08:58,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:58,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640931856] [2021-07-09 18:08:58,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640931856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:58,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945661295] [2021-07-09 18:08:58,831 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 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 [2021-07-09 18:08:58,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:08:58,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:58,862 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:08:58,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:59,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:59,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:08:59,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:08:59,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:08:59,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:08:59,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:08:59,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:08:59,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:08:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:59,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945661295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:59,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:59,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-07-09 18:08:59,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078106969] [2021-07-09 18:08:59,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:08:59,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:59,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:08:59,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:08:59,292 INFO L87 Difference]: Start difference. First operand 1542 states and 3051 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:08:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:59,620 INFO L93 Difference]: Finished difference Result 2925 states and 5994 transitions. [2021-07-09 18:08:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:08:59,625 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 39 [2021-07-09 18:08:59,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:59,629 INFO L225 Difference]: With dead ends: 2925 [2021-07-09 18:08:59,629 INFO L226 Difference]: Without dead ends: 2803 [2021-07-09 18:08:59,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:08:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-07-09 18:08:59,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1557. [2021-07-09 18:08:59,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 1.9800771208226222) internal successors, (3081), 1556 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:59,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 3081 transitions. [2021-07-09 18:08:59,646 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 3081 transitions. Word has length 39 [2021-07-09 18:08:59,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:59,647 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 3081 transitions. [2021-07-09 18:08:59,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-07-09 18:08:59,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 3081 transitions. [2021-07-09 18:08:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:08:59,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:59,648 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:59,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:08:59,864 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:59,864 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 79 times [2021-07-09 18:08:59,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:59,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458605521] [2021-07-09 18:08:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:00,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:00,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458605521] [2021-07-09 18:09:00,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458605521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:00,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493986083] [2021-07-09 18:09:00,126 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 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 [2021-07-09 18:09:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:00,152 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:09:00,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:00,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:00,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:09:00,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:00,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:00,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:00,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:09:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:00,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493986083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:00,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:00,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-07-09 18:09:00,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134403207] [2021-07-09 18:09:00,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:09:00,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:09:00,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:09:00,526 INFO L87 Difference]: Start difference. First operand 1557 states and 3081 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:01,255 INFO L93 Difference]: Finished difference Result 2411 states and 4790 transitions. [2021-07-09 18:09:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:09:01,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:09:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:01,258 INFO L225 Difference]: With dead ends: 2411 [2021-07-09 18:09:01,258 INFO L226 Difference]: Without dead ends: 2119 [2021-07-09 18:09:01,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 873.5ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:09:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-07-09 18:09:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1674. [2021-07-09 18:09:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.9796772265391511) internal successors, (3312), 1673 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3312 transitions. [2021-07-09 18:09:01,274 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3312 transitions. Word has length 39 [2021-07-09 18:09:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:01,274 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3312 transitions. [2021-07-09 18:09:01,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3312 transitions. [2021-07-09 18:09:01,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:09:01,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:01,275 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:01,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:01,476 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:01,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 80 times [2021-07-09 18:09:01,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:01,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106381150] [2021-07-09 18:09:01,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:01,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:01,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106381150] [2021-07-09 18:09:01,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106381150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:01,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133666605] [2021-07-09 18:09:01,704 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 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 [2021-07-09 18:09:01,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:01,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:01,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:09:01,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:02,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:09:02,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:02,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:02,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:02,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:09:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:02,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133666605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:02,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:02,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-07-09 18:09:02,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727226650] [2021-07-09 18:09:02,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:09:02,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:09:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:09:02,110 INFO L87 Difference]: Start difference. First operand 1674 states and 3312 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:02,343 INFO L93 Difference]: Finished difference Result 2847 states and 5742 transitions. [2021-07-09 18:09:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:09:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:09:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:02,346 INFO L225 Difference]: With dead ends: 2847 [2021-07-09 18:09:02,346 INFO L226 Difference]: Without dead ends: 2791 [2021-07-09 18:09:02,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:09:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-07-09 18:09:02,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1659. [2021-07-09 18:09:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.9782870928829916) internal successors, (3280), 1658 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3280 transitions. [2021-07-09 18:09:02,364 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3280 transitions. Word has length 39 [2021-07-09 18:09:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:02,365 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3280 transitions. [2021-07-09 18:09:02,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3280 transitions. [2021-07-09 18:09:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:09:02,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:02,366 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:02,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:02,567 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 81 times [2021-07-09 18:09:02,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:02,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557000127] [2021-07-09 18:09:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:02,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:02,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557000127] [2021-07-09 18:09:02,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557000127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:02,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495427369] [2021-07-09 18:09:02,828 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 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 [2021-07-09 18:09:02,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:09:02,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:02,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-07-09 18:09:02,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:03,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:03,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:03,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:03,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:03,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:03,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:03,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-07-09 18:09:03,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:03,511 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-09 18:09:03,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:03,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-07-09 18:09:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:03,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495427369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:03,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:03,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-07-09 18:09:03,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25839970] [2021-07-09 18:09:03,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:09:03,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:03,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:09:03,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:09:03,522 INFO L87 Difference]: Start difference. First operand 1659 states and 3280 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:04,993 INFO L93 Difference]: Finished difference Result 3263 states and 6548 transitions. [2021-07-09 18:09:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:09:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:09:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:04,997 INFO L225 Difference]: With dead ends: 3263 [2021-07-09 18:09:04,997 INFO L226 Difference]: Without dead ends: 3144 [2021-07-09 18:09:04,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1421.2ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:09:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-07-09 18:09:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 1719. [2021-07-09 18:09:05,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:05,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-07-09 18:09:05,018 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-07-09 18:09:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:05,018 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-07-09 18:09:05,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-07-09 18:09:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:09:05,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:05,020 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:05,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:05,235 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:05,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 82 times [2021-07-09 18:09:05,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:05,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711653833] [2021-07-09 18:09:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:05,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:05,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711653833] [2021-07-09 18:09:05,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711653833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:05,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617279467] [2021-07-09 18:09:05,520 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 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 [2021-07-09 18:09:05,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:05,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:05,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:09:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:05,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:05,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:05,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:09:05,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:05,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:05,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:05,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:09:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:05,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617279467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:05,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:05,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-07-09 18:09:05,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804218351] [2021-07-09 18:09:05,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:09:05,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:05,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:09:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:09:05,977 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:06,239 INFO L93 Difference]: Finished difference Result 3005 states and 6062 transitions. [2021-07-09 18:09:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:09:06,240 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:09:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:06,243 INFO L225 Difference]: With dead ends: 3005 [2021-07-09 18:09:06,243 INFO L226 Difference]: Without dead ends: 2947 [2021-07-09 18:09:06,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:09:06,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-07-09 18:09:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1719. [2021-07-09 18:09:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-07-09 18:09:06,271 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-07-09 18:09:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:06,271 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-07-09 18:09:06,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-07-09 18:09:06,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-09 18:09:06,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:06,273 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:06,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 18:09:06,474 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 83 times [2021-07-09 18:09:06,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:06,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762877122] [2021-07-09 18:09:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:06,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:06,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762877122] [2021-07-09 18:09:06,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762877122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:06,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52804046] [2021-07-09 18:09:06,749 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 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 [2021-07-09 18:09:06,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:09:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:06,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-07-09 18:09:06,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:07,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:07,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:07,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:09:07,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:07,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:07,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:07,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:09:07,218 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:07,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52804046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:07,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:07,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-07-09 18:09:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754175692] [2021-07-09 18:09:07,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:09:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:09:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:09:07,219 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:07,571 INFO L93 Difference]: Finished difference Result 2585 states and 5147 transitions. [2021-07-09 18:09:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:09:07,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-09 18:09:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:07,574 INFO L225 Difference]: With dead ends: 2585 [2021-07-09 18:09:07,574 INFO L226 Difference]: Without dead ends: 2553 [2021-07-09 18:09:07,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:09:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-07-09 18:09:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1750. [2021-07-09 18:09:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 1.979416809605489) internal successors, (3462), 1749 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3462 transitions. [2021-07-09 18:09:07,591 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3462 transitions. Word has length 39 [2021-07-09 18:09:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:07,591 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3462 transitions. [2021-07-09 18:09:07,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3462 transitions. [2021-07-09 18:09:07,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-07-09 18:09:07,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:07,593 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:07,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:07,794 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 84 times [2021-07-09 18:09:07,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:07,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139950858] [2021-07-09 18:09:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:08,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:08,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139950858] [2021-07-09 18:09:08,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139950858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:08,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631997514] [2021-07-09 18:09:08,036 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 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 [2021-07-09 18:09:08,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:09:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:08,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2021-07-09 18:09:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:08,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-07-09 18:09:08,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:08,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:08,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:08,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-07-09 18:09:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:08,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631997514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:08,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:08,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-07-09 18:09:08,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303171785] [2021-07-09 18:09:08,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:09:08,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:08,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:09:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:09:08,490 INFO L87 Difference]: Start difference. First operand 1750 states and 3462 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2021-07-09 18:09:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:09,741 INFO L93 Difference]: Finished difference Result 3417 states and 6971 transitions. [2021-07-09 18:09:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:09:09,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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 42 [2021-07-09 18:09:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:09,745 INFO L225 Difference]: With dead ends: 3417 [2021-07-09 18:09:09,745 INFO L226 Difference]: Without dead ends: 3297 [2021-07-09 18:09:09,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1342.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:09:09,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2021-07-09 18:09:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 1765. [2021-07-09 18:09:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 1.9795918367346939) internal successors, (3492), 1764 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 3492 transitions. [2021-07-09 18:09:09,767 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 3492 transitions. Word has length 42 [2021-07-09 18:09:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:09,768 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 3492 transitions. [2021-07-09 18:09:09,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) [2021-07-09 18:09:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 3492 transitions. [2021-07-09 18:09:09,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:09,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:09,770 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:09,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:09:09,983 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:09,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:09,983 INFO L82 PathProgramCache]: Analyzing trace with hash -726200285, now seen corresponding path program 85 times [2021-07-09 18:09:09,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:09,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278078376] [2021-07-09 18:09:09,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:10,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:10,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278078376] [2021-07-09 18:09:10,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278078376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:10,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100088807] [2021-07-09 18:09:10,262 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 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 [2021-07-09 18:09:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:10,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:10,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:10,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:10,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:10,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:10,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:11,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:11,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:11,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:11,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:11,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:11,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:09:11,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:11,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:11,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:11,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:09:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:11,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100088807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:11,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:11,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-07-09 18:09:11,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707438908] [2021-07-09 18:09:11,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:09:11,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:11,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:09:11,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:09:11,031 INFO L87 Difference]: Start difference. First operand 1765 states and 3492 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) [2021-07-09 18:09:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:11,598 INFO L93 Difference]: Finished difference Result 4013 states and 8194 transitions. [2021-07-09 18:09:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:09:11,599 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 43 [2021-07-09 18:09:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:11,610 INFO L225 Difference]: With dead ends: 4013 [2021-07-09 18:09:11,610 INFO L226 Difference]: Without dead ends: 3851 [2021-07-09 18:09:11,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 820.1ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:09:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-07-09 18:09:11,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 1882. [2021-07-09 18:09:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 1.977671451355662) internal successors, (3720), 1881 states have internal predecessors, (3720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 3720 transitions. [2021-07-09 18:09:11,630 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 3720 transitions. Word has length 43 [2021-07-09 18:09:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:11,630 INFO L482 AbstractCegarLoop]: Abstraction has 1882 states and 3720 transitions. [2021-07-09 18:09:11,630 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) [2021-07-09 18:09:11,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 3720 transitions. [2021-07-09 18:09:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:11,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:11,632 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:11,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:11,833 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash 733771603, now seen corresponding path program 86 times [2021-07-09 18:09:11,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:11,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646912657] [2021-07-09 18:09:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:12,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:12,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646912657] [2021-07-09 18:09:12,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646912657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:12,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208201309] [2021-07-09 18:09:12,101 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 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 [2021-07-09 18:09:12,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:12,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:12,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:12,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:12,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:12,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:12,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:09:12,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:12,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:12,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:12,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:09:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208201309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:12,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-07-09 18:09:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15793345] [2021-07-09 18:09:12,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:09:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:12,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:09:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:09:12,827 INFO L87 Difference]: Start difference. First operand 1882 states and 3720 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) [2021-07-09 18:09:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:13,265 INFO L93 Difference]: Finished difference Result 3614 states and 7238 transitions. [2021-07-09 18:09:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:09:13,266 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 43 [2021-07-09 18:09:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:13,269 INFO L225 Difference]: With dead ends: 3614 [2021-07-09 18:09:13,269 INFO L226 Difference]: Without dead ends: 3586 [2021-07-09 18:09:13,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 783.3ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:09:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-07-09 18:09:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 1927. [2021-07-09 18:09:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1927 states, 1926 states have (on average 1.9792315680166148) internal successors, (3812), 1926 states have internal predecessors, (3812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:13,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 3812 transitions. [2021-07-09 18:09:13,289 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 3812 transitions. Word has length 43 [2021-07-09 18:09:13,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:13,289 INFO L482 AbstractCegarLoop]: Abstraction has 1927 states and 3812 transitions. [2021-07-09 18:09:13,289 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) [2021-07-09 18:09:13,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 3812 transitions. [2021-07-09 18:09:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:13,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:13,291 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:13,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:13,491 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1669781235, now seen corresponding path program 87 times [2021-07-09 18:09:13,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:13,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687570231] [2021-07-09 18:09:13,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:13,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:13,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687570231] [2021-07-09 18:09:13,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687570231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:13,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748910285] [2021-07-09 18:09:13,790 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 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 [2021-07-09 18:09:13,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:09:13,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:13,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:09:13,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:14,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:14,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 55 [2021-07-09 18:09:14,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:14,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:14,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:14,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-07-09 18:09:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:14,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748910285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:14,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:14,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-09 18:09:14,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605740420] [2021-07-09 18:09:14,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:09:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:14,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:09:14,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:14,526 INFO L87 Difference]: Start difference. First operand 1927 states and 3812 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) [2021-07-09 18:09:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:14,877 INFO L93 Difference]: Finished difference Result 4338 states and 8863 transitions. [2021-07-09 18:09:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:09:14,878 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 43 [2021-07-09 18:09:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:14,882 INFO L225 Difference]: With dead ends: 4338 [2021-07-09 18:09:14,882 INFO L226 Difference]: Without dead ends: 4168 [2021-07-09 18:09:14,882 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 827.8ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:14,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-07-09 18:09:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 1762. [2021-07-09 18:09:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 1.9806927881885292) internal successors, (3488), 1761 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 3488 transitions. [2021-07-09 18:09:14,902 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 3488 transitions. Word has length 43 [2021-07-09 18:09:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:14,902 INFO L482 AbstractCegarLoop]: Abstraction has 1762 states and 3488 transitions. [2021-07-09 18:09:14,902 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) [2021-07-09 18:09:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 3488 transitions. [2021-07-09 18:09:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:14,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:14,904 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:15,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:15,105 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:15,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:15,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1165214173, now seen corresponding path program 88 times [2021-07-09 18:09:15,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:15,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769667687] [2021-07-09 18:09:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:15,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769667687] [2021-07-09 18:09:15,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769667687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:15,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304200095] [2021-07-09 18:09:15,441 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 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 [2021-07-09 18:09:15,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:09:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:15,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:15,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:16,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:16,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:16,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:16,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:16,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:09:16,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:16,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:16,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:16,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:09:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:16,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304200095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:16,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:16,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-09 18:09:16,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085126470] [2021-07-09 18:09:16,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:09:16,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:16,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:09:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:16,175 INFO L87 Difference]: Start difference. First operand 1762 states and 3488 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) [2021-07-09 18:09:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:16,719 INFO L93 Difference]: Finished difference Result 3585 states and 7206 transitions. [2021-07-09 18:09:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:09:16,719 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 43 [2021-07-09 18:09:16,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:16,723 INFO L225 Difference]: With dead ends: 3585 [2021-07-09 18:09:16,723 INFO L226 Difference]: Without dead ends: 3557 [2021-07-09 18:09:16,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 854.7ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-07-09 18:09:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 1810. [2021-07-09 18:09:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.9773355444997236) internal successors, (3577), 1809 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 3577 transitions. [2021-07-09 18:09:16,742 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 3577 transitions. Word has length 43 [2021-07-09 18:09:16,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:16,742 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 3577 transitions. [2021-07-09 18:09:16,742 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) [2021-07-09 18:09:16,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 3577 transitions. [2021-07-09 18:09:16,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:16,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:16,743 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:16,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:16,957 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2078296685, now seen corresponding path program 89 times [2021-07-09 18:09:16,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:16,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982391919] [2021-07-09 18:09:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:17,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:17,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982391919] [2021-07-09 18:09:17,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982391919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:17,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921995697] [2021-07-09 18:09:17,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:09:17,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:09:17,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:17,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:17,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:17,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:17,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:17,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:17,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:09:17,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:18,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:18,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:18,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:09:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:18,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921995697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:18,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:18,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-09 18:09:18,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969466270] [2021-07-09 18:09:18,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:09:18,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:18,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:09:18,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:18,013 INFO L87 Difference]: Start difference. First operand 1810 states and 3577 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) [2021-07-09 18:09:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:18,601 INFO L93 Difference]: Finished difference Result 3241 states and 6488 transitions. [2021-07-09 18:09:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:09:18,601 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 43 [2021-07-09 18:09:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:18,605 INFO L225 Difference]: With dead ends: 3241 [2021-07-09 18:09:18,605 INFO L226 Difference]: Without dead ends: 3198 [2021-07-09 18:09:18,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-07-09 18:09:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 1867. [2021-07-09 18:09:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 1.9715969989281887) internal successors, (3679), 1866 states have internal predecessors, (3679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3679 transitions. [2021-07-09 18:09:18,625 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3679 transitions. Word has length 43 [2021-07-09 18:09:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:18,625 INFO L482 AbstractCegarLoop]: Abstraction has 1867 states and 3679 transitions. [2021-07-09 18:09:18,625 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) [2021-07-09 18:09:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3679 transitions. [2021-07-09 18:09:18,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:18,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:18,627 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:18,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-09 18:09:18,828 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash 850764899, now seen corresponding path program 90 times [2021-07-09 18:09:18,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:18,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979217796] [2021-07-09 18:09:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:19,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979217796] [2021-07-09 18:09:19,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979217796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:19,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098412039] [2021-07-09 18:09:19,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:19,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:09:19,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:19,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:19,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:19,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:19,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:19,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:09:19,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:19,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:19,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:19,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:09:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:19,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098412039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:19,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:19,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-07-09 18:09:19,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685883537] [2021-07-09 18:09:19,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:09:19,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:09:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:09:19,775 INFO L87 Difference]: Start difference. First operand 1867 states and 3679 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2021-07-09 18:09:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:20,132 INFO L93 Difference]: Finished difference Result 3671 states and 7373 transitions. [2021-07-09 18:09:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:09:20,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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 43 [2021-07-09 18:09:20,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:20,136 INFO L225 Difference]: With dead ends: 3671 [2021-07-09 18:09:20,136 INFO L226 Difference]: Without dead ends: 3369 [2021-07-09 18:09:20,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:09:20,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2021-07-09 18:09:20,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 2005. [2021-07-09 18:09:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.966067864271457) internal successors, (3940), 2004 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 3940 transitions. [2021-07-09 18:09:20,156 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 3940 transitions. Word has length 43 [2021-07-09 18:09:20,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:20,156 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 3940 transitions. [2021-07-09 18:09:20,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2021-07-09 18:09:20,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 3940 transitions. [2021-07-09 18:09:20,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:20,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:20,158 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:20,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:20,359 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:20,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:20,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1086380131, now seen corresponding path program 91 times [2021-07-09 18:09:20,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:20,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118195356] [2021-07-09 18:09:20,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:20,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:20,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118195356] [2021-07-09 18:09:20,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118195356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:20,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892866194] [2021-07-09 18:09:20,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:20,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:20,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:21,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:21,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:21,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:21,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:21,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:21,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:09:21,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:21,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:21,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:21,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:09:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:21,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892866194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:21,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:21,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-09 18:09:21,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152815579] [2021-07-09 18:09:21,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:09:21,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:21,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:09:21,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:21,421 INFO L87 Difference]: Start difference. First operand 2005 states and 3940 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) [2021-07-09 18:09:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:21,806 INFO L93 Difference]: Finished difference Result 3677 states and 7454 transitions. [2021-07-09 18:09:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:09:21,806 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 43 [2021-07-09 18:09:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:21,810 INFO L225 Difference]: With dead ends: 3677 [2021-07-09 18:09:21,810 INFO L226 Difference]: Without dead ends: 3555 [2021-07-09 18:09:21,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 844.0ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:09:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2021-07-09 18:09:21,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2026. [2021-07-09 18:09:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 1.9664197530864198) internal successors, (3982), 2025 states have internal predecessors, (3982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 3982 transitions. [2021-07-09 18:09:21,854 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 3982 transitions. Word has length 43 [2021-07-09 18:09:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:21,854 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 3982 transitions. [2021-07-09 18:09:21,854 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) [2021-07-09 18:09:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 3982 transitions. [2021-07-09 18:09:21,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:21,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:21,856 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:22,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-09 18:09:22,056 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1033564323, now seen corresponding path program 92 times [2021-07-09 18:09:22,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:22,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156433215] [2021-07-09 18:09:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:22,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 18:09:22,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:22,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156433215] [2021-07-09 18:09:22,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156433215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:22,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180248191] [2021-07-09 18:09:22,305 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 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 [2021-07-09 18:09:22,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:09:22,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:22,337 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:09:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:22,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:22,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:22,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:23,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:23,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:23,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:23,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:23,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:09:23,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:23,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:09:23,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:23,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:09:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180248191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:23,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:23,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-07-09 18:09:23,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350889858] [2021-07-09 18:09:23,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:09:23,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:23,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:09:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:09:23,043 INFO L87 Difference]: Start difference. First operand 2026 states and 3982 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:23,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:09:23,725 INFO L93 Difference]: Finished difference Result 2865 states and 5658 transitions. [2021-07-09 18:09:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:09:23,726 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:09:23,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:09:23,728 INFO L225 Difference]: With dead ends: 2865 [2021-07-09 18:09:23,728 INFO L226 Difference]: Without dead ends: 2573 [2021-07-09 18:09:23,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1172.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:09:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-07-09 18:09:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2152. [2021-07-09 18:09:23,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.9655973965597398) internal successors, (4228), 2151 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 4228 transitions. [2021-07-09 18:09:23,746 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 4228 transitions. Word has length 43 [2021-07-09 18:09:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:09:23,746 INFO L482 AbstractCegarLoop]: Abstraction has 2152 states and 4228 transitions. [2021-07-09 18:09:23,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:09:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 4228 transitions. [2021-07-09 18:09:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:09:23,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:09:23,748 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:09:23,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:09:23,948 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:09:23,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:09:23,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1336709165, now seen corresponding path program 93 times [2021-07-09 18:09:23,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:09:23,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409966920] [2021-07-09 18:09:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:09:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:09:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:24,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:09:24,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409966920] [2021-07-09 18:09:24,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409966920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:24,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146577496] [2021-07-09 18:09:24,194 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 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 [2021-07-09 18:09:24,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:09:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:09:24,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 64 conjunts are in the unsatisfiable core [2021-07-09 18:09:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:09:51,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:51,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:51,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:51,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:09:51,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:51,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:09:51,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 55 [2021-07-09 18:09:51,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:09:51,755 INFO L628 ElimStorePlain]: treesize reduction 5, result has 86.5 percent of original size [2021-07-09 18:09:51,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:09:51,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:167, output treesize:7 [2021-07-09 18:09:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:09:51,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146577496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:09:51,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:09:51,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-07-09 18:09:51,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815995701] [2021-07-09 18:09:51,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:09:51,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:09:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:09:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=838, Unknown=8, NotChecked=0, Total=930 [2021-07-09 18:09:51,764 INFO L87 Difference]: Start difference. First operand 2152 states and 4228 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2021-07-09 18:10:01,357 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-07-09 18:10:31,461 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-07-09 18:10:39,238 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-07-09 18:10:52,317 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-09 18:11:28,104 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-07-09 18:11:32,733 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-07-09 18:11:57,662 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2021-07-09 18:12:15,130 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-07-09 18:14:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:26,419 INFO L93 Difference]: Finished difference Result 3588 states and 7132 transitions. [2021-07-09 18:14:26,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:14:26,449 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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 43 [2021-07-09 18:14:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:26,453 INFO L225 Difference]: With dead ends: 3588 [2021-07-09 18:14:26,453 INFO L226 Difference]: Without dead ends: 3323 [2021-07-09 18:14:26,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 100072.7ms TimeCoverageRelationStatistics Valid=196, Invalid=2036, Unknown=24, NotChecked=0, Total=2256 [2021-07-09 18:14:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2021-07-09 18:14:26,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 2161. [2021-07-09 18:14:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 1.963425925925926) internal successors, (4241), 2160 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 4241 transitions. [2021-07-09 18:14:26,473 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 4241 transitions. Word has length 43 [2021-07-09 18:14:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:26,473 INFO L482 AbstractCegarLoop]: Abstraction has 2161 states and 4241 transitions. [2021-07-09 18:14:26,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 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) [2021-07-09 18:14:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 4241 transitions. [2021-07-09 18:14:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:26,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:26,475 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:26,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:26,675 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:26,675 INFO L82 PathProgramCache]: Analyzing trace with hash 994068947, now seen corresponding path program 94 times [2021-07-09 18:14:26,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:26,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040493596] [2021-07-09 18:14:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:26,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040493596] [2021-07-09 18:14:26,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040493596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:26,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391933072] [2021-07-09 18:14:26,982 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 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 [2021-07-09 18:14:27,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:27,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:27,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:27,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:27,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:27,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:27,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:27,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:27,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:27,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:27,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:27,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:27,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:27,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:27,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:27,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391933072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:27,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:27,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-07-09 18:14:27,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975099772] [2021-07-09 18:14:27,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:14:27,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:14:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:27,747 INFO L87 Difference]: Start difference. First operand 2161 states and 4241 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) [2021-07-09 18:14:28,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:28,134 INFO L93 Difference]: Finished difference Result 3990 states and 7983 transitions. [2021-07-09 18:14:28,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:14:28,134 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 43 [2021-07-09 18:14:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:28,138 INFO L225 Difference]: With dead ends: 3990 [2021-07-09 18:14:28,138 INFO L226 Difference]: Without dead ends: 3926 [2021-07-09 18:14:28,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-07-09 18:14:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 2170. [2021-07-09 18:14:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 1.9594283079760257) internal successors, (4250), 2169 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 4250 transitions. [2021-07-09 18:14:28,168 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 4250 transitions. Word has length 43 [2021-07-09 18:14:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:28,168 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 4250 transitions. [2021-07-09 18:14:28,168 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) [2021-07-09 18:14:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 4250 transitions. [2021-07-09 18:14:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:28,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:28,170 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:28,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 18:14:28,371 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:28,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:28,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1101093933, now seen corresponding path program 95 times [2021-07-09 18:14:28,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:28,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435536804] [2021-07-09 18:14:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:28,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:28,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:28,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435536804] [2021-07-09 18:14:28,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435536804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:28,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663107746] [2021-07-09 18:14:28,674 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 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 [2021-07-09 18:14:28,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:14:28,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:28,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:14:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:29,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:29,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:29,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:29,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:29,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:29,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:29,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:29,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:29,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663107746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:29,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:29,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-09 18:14:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699124397] [2021-07-09 18:14:29,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:14:29,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:14:29,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:14:29,461 INFO L87 Difference]: Start difference. First operand 2170 states and 4250 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) [2021-07-09 18:14:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:29,972 INFO L93 Difference]: Finished difference Result 3989 states and 7996 transitions. [2021-07-09 18:14:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:14:29,972 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 43 [2021-07-09 18:14:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:29,976 INFO L225 Difference]: With dead ends: 3989 [2021-07-09 18:14:29,976 INFO L226 Difference]: Without dead ends: 3711 [2021-07-09 18:14:29,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:14:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-07-09 18:14:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2218. [2021-07-09 18:14:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-07-09 18:14:29,997 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-07-09 18:14:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:29,997 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-07-09 18:14:29,998 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) [2021-07-09 18:14:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-07-09 18:14:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:29,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:29,999 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:30,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:14:30,200 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:30,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1208361635, now seen corresponding path program 96 times [2021-07-09 18:14:30,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:30,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336463066] [2021-07-09 18:14:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:30,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:30,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336463066] [2021-07-09 18:14:30,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336463066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:30,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294853159] [2021-07-09 18:14:30,532 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 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 [2021-07-09 18:14:30,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:14:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:30,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:30,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:31,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:31,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:31,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:31,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:31,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 28 disjoint index pairs (out of 105 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:31,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:31,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:31,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:31,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:31,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294853159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:31,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:31,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-07-09 18:14:31,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949197860] [2021-07-09 18:14:31,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:14:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:31,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:14:31,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:14:31,266 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 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) [2021-07-09 18:14:31,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:31,848 INFO L93 Difference]: Finished difference Result 3315 states and 6548 transitions. [2021-07-09 18:14:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:14:31,848 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 43 [2021-07-09 18:14:31,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:31,852 INFO L225 Difference]: With dead ends: 3315 [2021-07-09 18:14:31,852 INFO L226 Difference]: Without dead ends: 3300 [2021-07-09 18:14:31,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:14:31,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2021-07-09 18:14:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 2218. [2021-07-09 18:14:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 1.958953540820929) internal successors, (4343), 2217 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 4343 transitions. [2021-07-09 18:14:31,878 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 4343 transitions. Word has length 43 [2021-07-09 18:14:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:31,878 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 4343 transitions. [2021-07-09 18:14:31,878 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) [2021-07-09 18:14:31,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 4343 transitions. [2021-07-09 18:14:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:31,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:31,880 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:32,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:32,080 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash 236561603, now seen corresponding path program 97 times [2021-07-09 18:14:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:32,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773943968] [2021-07-09 18:14:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:32,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:32,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773943968] [2021-07-09 18:14:32,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773943968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:32,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362044636] [2021-07-09 18:14:32,404 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 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 [2021-07-09 18:14:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:32,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:33,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:33,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:33,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:33,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:33,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:33,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:33,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:33,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:33,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:33,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:33,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362044636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:33,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:33,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-09 18:14:33,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615211041] [2021-07-09 18:14:33,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:14:33,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:33,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:14:33,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:33,150 INFO L87 Difference]: Start difference. First operand 2218 states and 4343 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:33,651 INFO L93 Difference]: Finished difference Result 4305 states and 8580 transitions. [2021-07-09 18:14:33,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:14:33,651 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:33,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:33,656 INFO L225 Difference]: With dead ends: 4305 [2021-07-09 18:14:33,656 INFO L226 Difference]: Without dead ends: 4235 [2021-07-09 18:14:33,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 835.7ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-07-09 18:14:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2425. [2021-07-09 18:14:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2425 states, 2424 states have (on average 1.953795379537954) internal successors, (4736), 2424 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2425 states to 2425 states and 4736 transitions. [2021-07-09 18:14:33,680 INFO L78 Accepts]: Start accepts. Automaton has 2425 states and 4736 transitions. Word has length 43 [2021-07-09 18:14:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:33,680 INFO L482 AbstractCegarLoop]: Abstraction has 2425 states and 4736 transitions. [2021-07-09 18:14:33,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2425 states and 4736 transitions. [2021-07-09 18:14:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:33,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:33,682 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:33,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:14:33,883 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1240929379, now seen corresponding path program 98 times [2021-07-09 18:14:33,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:33,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681272678] [2021-07-09 18:14:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:34,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:34,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681272678] [2021-07-09 18:14:34,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681272678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:34,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867421736] [2021-07-09 18:14:34,160 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 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 [2021-07-09 18:14:34,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:34,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:34,187 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:34,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:34,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:34,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:34,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:34,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:34,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:34,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:34,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:34,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:34,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:34,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:34,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867421736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:34,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:34,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-07-09 18:14:34,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866327903] [2021-07-09 18:14:34,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:14:34,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:34,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:14:34,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:14:34,861 INFO L87 Difference]: Start difference. First operand 2425 states and 4736 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:35,749 INFO L93 Difference]: Finished difference Result 3888 states and 7643 transitions. [2021-07-09 18:14:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:14:35,749 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:35,753 INFO L225 Difference]: With dead ends: 3888 [2021-07-09 18:14:35,753 INFO L226 Difference]: Without dead ends: 3511 [2021-07-09 18:14:35,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1103.3ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:14:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-07-09 18:14:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2797. [2021-07-09 18:14:35,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 1.9549356223175967) internal successors, (5466), 2796 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 5466 transitions. [2021-07-09 18:14:35,779 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 5466 transitions. Word has length 43 [2021-07-09 18:14:35,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:35,779 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 5466 transitions. [2021-07-09 18:14:35,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 5466 transitions. [2021-07-09 18:14:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:35,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:35,782 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:35,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:14:35,982 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash -893728877, now seen corresponding path program 99 times [2021-07-09 18:14:35,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:35,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506315091] [2021-07-09 18:14:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:36,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:36,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506315091] [2021-07-09 18:14:36,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506315091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:36,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474040493] [2021-07-09 18:14:36,297 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 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 [2021-07-09 18:14:36,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:14:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:36,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:36,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:36,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:36,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:36,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:36,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:36,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:36,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:36,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:37,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474040493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:37,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:37,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-09 18:14:37,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725931339] [2021-07-09 18:14:37,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:14:37,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:37,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:14:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:37,005 INFO L87 Difference]: Start difference. First operand 2797 states and 5466 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:37,417 INFO L93 Difference]: Finished difference Result 4489 states and 9045 transitions. [2021-07-09 18:14:37,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:14:37,417 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:37,422 INFO L225 Difference]: With dead ends: 4489 [2021-07-09 18:14:37,422 INFO L226 Difference]: Without dead ends: 4335 [2021-07-09 18:14:37,422 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-07-09 18:14:37,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2827. [2021-07-09 18:14:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 1.9554140127388535) internal successors, (5526), 2826 states have internal predecessors, (5526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 5526 transitions. [2021-07-09 18:14:37,452 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 5526 transitions. Word has length 43 [2021-07-09 18:14:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:37,452 INFO L482 AbstractCegarLoop]: Abstraction has 2827 states and 5526 transitions. [2021-07-09 18:14:37,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 5526 transitions. [2021-07-09 18:14:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:37,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:37,454 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:37,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 18:14:37,655 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:37,656 INFO L82 PathProgramCache]: Analyzing trace with hash -946544685, now seen corresponding path program 100 times [2021-07-09 18:14:37,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:37,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426420321] [2021-07-09 18:14:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:37,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:37,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426420321] [2021-07-09 18:14:37,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426420321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:37,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396831559] [2021-07-09 18:14:37,941 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 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 [2021-07-09 18:14:37,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:37,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:37,967 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:37,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:38,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:38,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:38,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:38,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:38,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:38,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:38,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:38,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:38,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396831559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:38,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:38,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-07-09 18:14:38,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520445884] [2021-07-09 18:14:38,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:14:38,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:14:38,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:14:38,631 INFO L87 Difference]: Start difference. First operand 2827 states and 5526 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:39,623 INFO L93 Difference]: Finished difference Result 4129 states and 8090 transitions. [2021-07-09 18:14:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:14:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:39,628 INFO L225 Difference]: With dead ends: 4129 [2021-07-09 18:14:39,628 INFO L226 Difference]: Without dead ends: 3769 [2021-07-09 18:14:39,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1202.0ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:14:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3769 states. [2021-07-09 18:14:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3769 to 3141. [2021-07-09 18:14:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3141 states, 3140 states have (on average 1.9576433121019108) internal successors, (6147), 3140 states have internal predecessors, (6147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 6147 transitions. [2021-07-09 18:14:39,657 INFO L78 Accepts]: Start accepts. Automaton has 3141 states and 6147 transitions. Word has length 43 [2021-07-09 18:14:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:39,657 INFO L482 AbstractCegarLoop]: Abstraction has 3141 states and 6147 transitions. [2021-07-09 18:14:39,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3141 states and 6147 transitions. [2021-07-09 18:14:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:39,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:39,660 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:39,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:39,872 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash -986040061, now seen corresponding path program 101 times [2021-07-09 18:14:39,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:39,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909577855] [2021-07-09 18:14:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:40,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:40,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909577855] [2021-07-09 18:14:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909577855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:40,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053488162] [2021-07-09 18:14:40,177 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 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 [2021-07-09 18:14:40,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:14:40,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:40,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:14:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:40,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:40,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:40,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:40,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:40,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:40,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:40,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:40,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:40,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:40,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053488162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:40,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:40,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 31 [2021-07-09 18:14:40,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653094051] [2021-07-09 18:14:40,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:14:40,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:40,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:14:40,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:40,906 INFO L87 Difference]: Start difference. First operand 3141 states and 6147 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:41,297 INFO L93 Difference]: Finished difference Result 5700 states and 11356 transitions. [2021-07-09 18:14:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:14:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:41,302 INFO L225 Difference]: With dead ends: 5700 [2021-07-09 18:14:41,302 INFO L226 Difference]: Without dead ends: 5434 [2021-07-09 18:14:41,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 832.1ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5434 states. [2021-07-09 18:14:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5434 to 3258. [2021-07-09 18:14:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3258 states, 3257 states have (on average 1.9610070617132331) internal successors, (6387), 3257 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3258 states to 3258 states and 6387 transitions. [2021-07-09 18:14:41,335 INFO L78 Accepts]: Start accepts. Automaton has 3258 states and 6387 transitions. Word has length 43 [2021-07-09 18:14:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:41,335 INFO L482 AbstractCegarLoop]: Abstraction has 3258 states and 6387 transitions. [2021-07-09 18:14:41,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:41,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3258 states and 6387 transitions. [2021-07-09 18:14:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:41,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:41,338 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:41,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 18:14:41,538 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:41,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:41,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1213764355, now seen corresponding path program 102 times [2021-07-09 18:14:41,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:41,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785154526] [2021-07-09 18:14:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:41,850 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:41,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:41,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785154526] [2021-07-09 18:14:41,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785154526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:41,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881693510] [2021-07-09 18:14:41,850 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 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 [2021-07-09 18:14:41,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:14:41,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:41,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-07-09 18:14:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:42,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:42,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:42,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:42,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:42,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:42,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:42,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:42,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:42,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:42,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881693510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:42,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:42,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-09 18:14:42,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314030391] [2021-07-09 18:14:42,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:14:42,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:42,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:14:42,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:42,571 INFO L87 Difference]: Start difference. First operand 3258 states and 6387 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:43,165 INFO L93 Difference]: Finished difference Result 4967 states and 9920 transitions. [2021-07-09 18:14:43,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:14:43,166 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:43,171 INFO L225 Difference]: With dead ends: 4967 [2021-07-09 18:14:43,171 INFO L226 Difference]: Without dead ends: 4691 [2021-07-09 18:14:43,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 824.1ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2021-07-09 18:14:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 3321. [2021-07-09 18:14:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-07-09 18:14:43,204 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-07-09 18:14:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:43,205 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-07-09 18:14:43,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-07-09 18:14:43,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:43,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:43,207 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:43,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 18:14:43,408 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:43,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:43,408 INFO L82 PathProgramCache]: Analyzing trace with hash -771747373, now seen corresponding path program 103 times [2021-07-09 18:14:43,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:43,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122696666] [2021-07-09 18:14:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:43,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:43,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122696666] [2021-07-09 18:14:43,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122696666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:43,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122994167] [2021-07-09 18:14:43,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:43,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:43,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:44,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:44,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:44,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:44,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:44,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:44,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:44,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:44,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:44,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:44,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:44,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:44,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122994167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:44,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:44,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-09 18:14:44,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961582134] [2021-07-09 18:14:44,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:14:44,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:14:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:44,429 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:44,954 INFO L93 Difference]: Finished difference Result 4281 states and 8456 transitions. [2021-07-09 18:14:44,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:14:44,954 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:44,958 INFO L225 Difference]: With dead ends: 4281 [2021-07-09 18:14:44,958 INFO L226 Difference]: Without dead ends: 4266 [2021-07-09 18:14:44,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 808.1ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:44,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-07-09 18:14:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3321. [2021-07-09 18:14:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3321 states, 3320 states have (on average 1.9623493975903614) internal successors, (6515), 3320 states have internal predecessors, (6515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3321 states to 3321 states and 6515 transitions. [2021-07-09 18:14:44,994 INFO L78 Accepts]: Start accepts. Automaton has 3321 states and 6515 transitions. Word has length 43 [2021-07-09 18:14:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:44,994 INFO L482 AbstractCegarLoop]: Abstraction has 3321 states and 6515 transitions. [2021-07-09 18:14:44,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3321 states and 6515 transitions. [2021-07-09 18:14:44,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:44,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:44,997 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:45,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:45,201 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:45,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1004072413, now seen corresponding path program 104 times [2021-07-09 18:14:45,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:45,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703569030] [2021-07-09 18:14:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:45,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703569030] [2021-07-09 18:14:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703569030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382845669] [2021-07-09 18:14:45,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:45,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:45,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:45,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:46,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:46,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:46,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:46,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:46,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:46,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:46,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:46,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:46,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:46,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382845669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:46,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:46,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-07-09 18:14:46,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373342012] [2021-07-09 18:14:46,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:14:46,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:14:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:46,183 INFO L87 Difference]: Start difference. First operand 3321 states and 6515 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:46,727 INFO L93 Difference]: Finished difference Result 6029 states and 12136 transitions. [2021-07-09 18:14:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:14:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:46,734 INFO L225 Difference]: With dead ends: 6029 [2021-07-09 18:14:46,734 INFO L226 Difference]: Without dead ends: 5816 [2021-07-09 18:14:46,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5816 states. [2021-07-09 18:14:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5816 to 3424. [2021-07-09 18:14:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 1.964943032427695) internal successors, (6726), 3423 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 6726 transitions. [2021-07-09 18:14:46,781 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 6726 transitions. Word has length 43 [2021-07-09 18:14:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:46,781 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 6726 transitions. [2021-07-09 18:14:46,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 6726 transitions. [2021-07-09 18:14:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:46,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:46,783 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:46,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:46,996 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1103420819, now seen corresponding path program 105 times [2021-07-09 18:14:46,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:46,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313745452] [2021-07-09 18:14:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:47,326 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:47,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313745452] [2021-07-09 18:14:47,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313745452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:47,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663680580] [2021-07-09 18:14:47,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:47,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:14:47,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:47,354 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:47,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:47,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:47,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:47,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:47,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:47,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:48,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:48,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:48,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:48,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:48,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663680580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:48,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:48,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-07-09 18:14:48,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871787089] [2021-07-09 18:14:48,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:14:48,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:14:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:48,019 INFO L87 Difference]: Start difference. First operand 3424 states and 6726 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:48,535 INFO L93 Difference]: Finished difference Result 5238 states and 10412 transitions. [2021-07-09 18:14:48,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:14:48,535 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:48,541 INFO L225 Difference]: With dead ends: 5238 [2021-07-09 18:14:48,541 INFO L226 Difference]: Without dead ends: 5180 [2021-07-09 18:14:48,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5180 states. [2021-07-09 18:14:48,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5180 to 3451. [2021-07-09 18:14:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-07-09 18:14:48,574 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-07-09 18:14:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:48,574 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-07-09 18:14:48,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-07-09 18:14:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:48,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:48,577 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:48,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:48,777 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -882090909, now seen corresponding path program 106 times [2021-07-09 18:14:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:48,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998101227] [2021-07-09 18:14:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:49,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998101227] [2021-07-09 18:14:49,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998101227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:49,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842212627] [2021-07-09 18:14:49,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:49,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:14:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:49,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:49,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:49,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:49,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:49,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:49,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:49,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:49,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:49,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842212627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:49,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:49,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-07-09 18:14:49,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902002534] [2021-07-09 18:14:49,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:14:49,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:49,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:14:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:49,796 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:50,303 INFO L93 Difference]: Finished difference Result 4745 states and 9374 transitions. [2021-07-09 18:14:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:14:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:50,309 INFO L225 Difference]: With dead ends: 4745 [2021-07-09 18:14:50,309 INFO L226 Difference]: Without dead ends: 4730 [2021-07-09 18:14:50,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 804.4ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:14:50,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4730 states. [2021-07-09 18:14:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4730 to 3451. [2021-07-09 18:14:50,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3451 states, 3450 states have (on average 1.9663768115942029) internal successors, (6784), 3450 states have internal predecessors, (6784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3451 states to 3451 states and 6784 transitions. [2021-07-09 18:14:50,343 INFO L78 Accepts]: Start accepts. Automaton has 3451 states and 6784 transitions. Word has length 43 [2021-07-09 18:14:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:50,343 INFO L482 AbstractCegarLoop]: Abstraction has 3451 states and 6784 transitions. [2021-07-09 18:14:50,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3451 states and 6784 transitions. [2021-07-09 18:14:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:50,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:50,346 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:50,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:50,546 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash 204094867, now seen corresponding path program 107 times [2021-07-09 18:14:50,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:50,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408431696] [2021-07-09 18:14:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:50,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408431696] [2021-07-09 18:14:50,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408431696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081144275] [2021-07-09 18:14:50,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:50,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:14:50,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:50,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:51,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:51,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:51,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:51,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:51,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:51,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:51,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:51,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:51,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081144275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:51,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:51,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-07-09 18:14:51,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839309680] [2021-07-09 18:14:51,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:14:51,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:51,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:14:51,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:14:51,433 INFO L87 Difference]: Start difference. First operand 3451 states and 6784 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:51,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:51,923 INFO L93 Difference]: Finished difference Result 5475 states and 10796 transitions. [2021-07-09 18:14:51,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:14:51,924 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:51,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:51,929 INFO L225 Difference]: With dead ends: 5475 [2021-07-09 18:14:51,929 INFO L226 Difference]: Without dead ends: 5191 [2021-07-09 18:14:51,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 693.4ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:14:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5191 states. [2021-07-09 18:14:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5191 to 3671. [2021-07-09 18:14:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.9724795640326975) internal successors, (7239), 3670 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7239 transitions. [2021-07-09 18:14:51,965 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7239 transitions. Word has length 43 [2021-07-09 18:14:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:51,965 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7239 transitions. [2021-07-09 18:14:51,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7239 transitions. [2021-07-09 18:14:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:51,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:51,969 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:52,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:14:52,184 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:52,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:52,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1930563389, now seen corresponding path program 108 times [2021-07-09 18:14:52,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:52,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37215159] [2021-07-09 18:14:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:52,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:52,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37215159] [2021-07-09 18:14:52,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37215159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:52,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222017616] [2021-07-09 18:14:52,520 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 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 [2021-07-09 18:14:52,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:14:52,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:52,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:52,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:53,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:53,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:53,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:53,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:53,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:53,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:53,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:53,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222017616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:53,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:53,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-07-09 18:14:53,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283232696] [2021-07-09 18:14:53,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:14:53,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:53,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:14:53,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:14:53,155 INFO L87 Difference]: Start difference. First operand 3671 states and 7239 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:53,799 INFO L93 Difference]: Finished difference Result 5940 states and 12046 transitions. [2021-07-09 18:14:53,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:14:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:53,805 INFO L225 Difference]: With dead ends: 5940 [2021-07-09 18:14:53,805 INFO L226 Difference]: Without dead ends: 5733 [2021-07-09 18:14:53,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 771.7ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:14:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states. [2021-07-09 18:14:53,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 3683. [2021-07-09 18:14:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 1.9731124388919066) internal successors, (7265), 3682 states have internal predecessors, (7265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 7265 transitions. [2021-07-09 18:14:53,844 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 7265 transitions. Word has length 43 [2021-07-09 18:14:53,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:53,844 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 7265 transitions. [2021-07-09 18:14:53,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:53,844 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 7265 transitions. [2021-07-09 18:14:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:53,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:53,847 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:54,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:14:54,048 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash 378892179, now seen corresponding path program 109 times [2021-07-09 18:14:54,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:54,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406919044] [2021-07-09 18:14:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:54,365 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:54,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:54,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406919044] [2021-07-09 18:14:54,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406919044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:54,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206762319] [2021-07-09 18:14:54,366 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 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 [2021-07-09 18:14:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:54,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:54,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:54,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:54,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:55,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:55,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 28 disjoint index pairs (out of 66 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:55,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:55,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:55,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:55,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:55,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206762319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:55,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:55,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-07-09 18:14:55,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764964953] [2021-07-09 18:14:55,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:14:55,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:14:55,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:14:55,020 INFO L87 Difference]: Start difference. First operand 3683 states and 7265 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:55,422 INFO L93 Difference]: Finished difference Result 4821 states and 9570 transitions. [2021-07-09 18:14:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:14:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:14:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:55,427 INFO L225 Difference]: With dead ends: 4821 [2021-07-09 18:14:55,427 INFO L226 Difference]: Without dead ends: 4806 [2021-07-09 18:14:55,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:14:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4806 states. [2021-07-09 18:14:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4806 to 3686. [2021-07-09 18:14:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3685 states have (on average 1.973134328358209) internal successors, (7271), 3685 states have internal predecessors, (7271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:55,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 7271 transitions. [2021-07-09 18:14:55,459 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 7271 transitions. Word has length 43 [2021-07-09 18:14:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:55,459 INFO L482 AbstractCegarLoop]: Abstraction has 3686 states and 7271 transitions. [2021-07-09 18:14:55,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 7271 transitions. [2021-07-09 18:14:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:55,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:55,462 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:55,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:14:55,663 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:55,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2138105379, now seen corresponding path program 110 times [2021-07-09 18:14:55,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:55,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243409059] [2021-07-09 18:14:55,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:55,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:55,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243409059] [2021-07-09 18:14:55,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243409059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:55,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765142590] [2021-07-09 18:14:55,999 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 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 [2021-07-09 18:14:56,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:14:56,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:56,026 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:56,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:56,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:56,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 28 disjoint index pairs (out of 55 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:14:56,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:56,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:14:56,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:56,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:14:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:56,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765142590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:56,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:56,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-07-09 18:14:56,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698485820] [2021-07-09 18:14:56,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:14:56,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:14:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:14:56,611 INFO L87 Difference]: Start difference. First operand 3686 states and 7271 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2021-07-09 18:14:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:14:57,123 INFO L93 Difference]: Finished difference Result 5294 states and 10543 transitions. [2021-07-09 18:14:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:14:57,123 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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 43 [2021-07-09 18:14:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:14:57,129 INFO L225 Difference]: With dead ends: 5294 [2021-07-09 18:14:57,129 INFO L226 Difference]: Without dead ends: 5264 [2021-07-09 18:14:57,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:14:57,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5264 states. [2021-07-09 18:14:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5264 to 3722. [2021-07-09 18:14:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 1.97420048374093) internal successors, (7346), 3721 states have internal predecessors, (7346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:14:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 7346 transitions. [2021-07-09 18:14:57,173 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 7346 transitions. Word has length 43 [2021-07-09 18:14:57,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:14:57,173 INFO L482 AbstractCegarLoop]: Abstraction has 3722 states and 7346 transitions. [2021-07-09 18:14:57,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2021-07-09 18:14:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 7346 transitions. [2021-07-09 18:14:57,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:14:57,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:14:57,176 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:14:57,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:14:57,377 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:14:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:14:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1246050477, now seen corresponding path program 111 times [2021-07-09 18:14:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:14:57,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196474222] [2021-07-09 18:14:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:14:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:14:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:57,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:14:57,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196474222] [2021-07-09 18:14:57,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196474222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:57,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589131160] [2021-07-09 18:14:57,700 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 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 [2021-07-09 18:14:57,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:14:57,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:14:57,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:14:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:14:58,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:58,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:58,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:58,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:58,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:14:58,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:14:58,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 55 [2021-07-09 18:14:58,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:14:58,546 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-09 18:14:58,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:14:58,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-07-09 18:14:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:14:58,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589131160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:14:58,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:14:58,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-07-09 18:14:58,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924335630] [2021-07-09 18:14:58,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:14:58,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:14:58,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:14:58,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:14:58,556 INFO L87 Difference]: Start difference. First operand 3722 states and 7346 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-07-09 18:15:00,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:00,751 INFO L93 Difference]: Finished difference Result 5592 states and 11061 transitions. [2021-07-09 18:15:00,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:15:00,751 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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 43 [2021-07-09 18:15:00,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:00,757 INFO L225 Difference]: With dead ends: 5592 [2021-07-09 18:15:00,757 INFO L226 Difference]: Without dead ends: 5209 [2021-07-09 18:15:00,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2303.7ms TimeCoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:15:00,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5209 states. [2021-07-09 18:15:00,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5209 to 4162. [2021-07-09 18:15:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4162 states, 4161 states have (on average 1.9699591444364335) internal successors, (8197), 4161 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4162 states to 4162 states and 8197 transitions. [2021-07-09 18:15:00,795 INFO L78 Accepts]: Start accepts. Automaton has 4162 states and 8197 transitions. Word has length 43 [2021-07-09 18:15:00,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:00,795 INFO L482 AbstractCegarLoop]: Abstraction has 4162 states and 8197 transitions. [2021-07-09 18:15:00,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 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) [2021-07-09 18:15:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4162 states and 8197 transitions. [2021-07-09 18:15:00,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:00,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:00,798 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:01,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 18:15:01,000 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:01,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:01,000 INFO L82 PathProgramCache]: Analyzing trace with hash 214609235, now seen corresponding path program 112 times [2021-07-09 18:15:01,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:01,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880108799] [2021-07-09 18:15:01,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:01,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880108799] [2021-07-09 18:15:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880108799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809253561] [2021-07-09 18:15:01,268 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:01,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:01,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:01,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:01,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:01,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:01,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:01,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:01,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:01,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:01,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809253561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:01,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:01,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-07-09 18:15:01,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020833913] [2021-07-09 18:15:01,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:15:01,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:01,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:15:01,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:15:01,834 INFO L87 Difference]: Start difference. First operand 4162 states and 8197 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:03,102 INFO L93 Difference]: Finished difference Result 7069 states and 14124 transitions. [2021-07-09 18:15:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:15:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:03,108 INFO L225 Difference]: With dead ends: 7069 [2021-07-09 18:15:03,108 INFO L226 Difference]: Without dead ends: 6666 [2021-07-09 18:15:03,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1436.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:15:03,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6666 states. [2021-07-09 18:15:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6666 to 4415. [2021-07-09 18:15:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4415 states, 4414 states have (on average 1.9725872224739465) internal successors, (8707), 4414 states have internal predecessors, (8707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 8707 transitions. [2021-07-09 18:15:03,150 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 8707 transitions. Word has length 43 [2021-07-09 18:15:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:03,150 INFO L482 AbstractCegarLoop]: Abstraction has 4415 states and 8707 transitions. [2021-07-09 18:15:03,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 8707 transitions. [2021-07-09 18:15:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:03,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:03,154 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:03,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:03,354 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:03,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1068380643, now seen corresponding path program 113 times [2021-07-09 18:15:03,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:03,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695205121] [2021-07-09 18:15:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:15:03,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695205121] [2021-07-09 18:15:03,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695205121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884099876] [2021-07-09 18:15:03,614 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:03,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:15:03,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:03,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:04,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:04,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 44 [2021-07-09 18:15:04,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:04,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:04,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:04,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-07-09 18:15:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:04,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884099876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:04,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:04,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-07-09 18:15:04,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556721197] [2021-07-09 18:15:04,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-09 18:15:04,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:04,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-09 18:15:04,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:15:04,345 INFO L87 Difference]: Start difference. First operand 4415 states and 8707 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:05,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:05,689 INFO L93 Difference]: Finished difference Result 5648 states and 11150 transitions. [2021-07-09 18:15:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:15:05,690 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:05,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:05,696 INFO L225 Difference]: With dead ends: 5648 [2021-07-09 18:15:05,696 INFO L226 Difference]: Without dead ends: 5539 [2021-07-09 18:15:05,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1572.8ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:15:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5539 states. [2021-07-09 18:15:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5539 to 4486. [2021-07-09 18:15:05,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4486 states, 4485 states have (on average 1.9745819397993312) internal successors, (8856), 4485 states have internal predecessors, (8856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4486 states to 4486 states and 8856 transitions. [2021-07-09 18:15:05,736 INFO L78 Accepts]: Start accepts. Automaton has 4486 states and 8856 transitions. Word has length 43 [2021-07-09 18:15:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:05,736 INFO L482 AbstractCegarLoop]: Abstraction has 4486 states and 8856 transitions. [2021-07-09 18:15:05,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4486 states and 8856 transitions. [2021-07-09 18:15:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:05,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:05,739 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:05,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:15:05,940 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash -198698669, now seen corresponding path program 114 times [2021-07-09 18:15:05,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:05,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139910502] [2021-07-09 18:15:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139910502] [2021-07-09 18:15:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139910502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979533640] [2021-07-09 18:15:06,215 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:06,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:15:06,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:06,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:06,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:06,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:06,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:06,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:06,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:06,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:06,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:06,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:06,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:06,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979533640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:06,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:06,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-07-09 18:15:06,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403638918] [2021-07-09 18:15:06,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:15:06,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:15:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:06,741 INFO L87 Difference]: Start difference. First operand 4486 states and 8856 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:07,098 INFO L93 Difference]: Finished difference Result 6505 states and 12851 transitions. [2021-07-09 18:15:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:15:07,099 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:07,106 INFO L225 Difference]: With dead ends: 6505 [2021-07-09 18:15:07,106 INFO L226 Difference]: Without dead ends: 6237 [2021-07-09 18:15:07,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6237 states. [2021-07-09 18:15:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6237 to 4662. [2021-07-09 18:15:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 4661 states have (on average 1.977043552885647) internal successors, (9215), 4661 states have internal predecessors, (9215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 9215 transitions. [2021-07-09 18:15:07,151 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 9215 transitions. Word has length 43 [2021-07-09 18:15:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:07,151 INFO L482 AbstractCegarLoop]: Abstraction has 4662 states and 9215 transitions. [2021-07-09 18:15:07,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 9215 transitions. [2021-07-09 18:15:07,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:07,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:07,154 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:07,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:07,355 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:07,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:07,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1284041555, now seen corresponding path program 115 times [2021-07-09 18:15:07,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:07,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190505359] [2021-07-09 18:15:07,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:07,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190505359] [2021-07-09 18:15:07,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190505359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:07,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096201063] [2021-07-09 18:15:07,642 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:07,668 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:08,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:08,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:08,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:08,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:08,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:08,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:08,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:08,178 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:08,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096201063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:08,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:08,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-07-09 18:15:08,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158766415] [2021-07-09 18:15:08,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:15:08,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:08,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:15:08,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:08,179 INFO L87 Difference]: Start difference. First operand 4662 states and 9215 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:08,498 INFO L93 Difference]: Finished difference Result 6935 states and 13838 transitions. [2021-07-09 18:15:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:15:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:08,505 INFO L225 Difference]: With dead ends: 6935 [2021-07-09 18:15:08,505 INFO L226 Difference]: Without dead ends: 6690 [2021-07-09 18:15:08,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 647.6ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6690 states. [2021-07-09 18:15:08,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6690 to 5133. [2021-07-09 18:15:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 5132 states have (on average 1.9912314886983633) internal successors, (10219), 5132 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 10219 transitions. [2021-07-09 18:15:08,558 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 10219 transitions. Word has length 43 [2021-07-09 18:15:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:08,558 INFO L482 AbstractCegarLoop]: Abstraction has 5133 states and 10219 transitions. [2021-07-09 18:15:08,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 10219 transitions. [2021-07-09 18:15:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:08,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:08,561 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:08,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:08,762 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:08,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1550266029, now seen corresponding path program 116 times [2021-07-09 18:15:08,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:08,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564404017] [2021-07-09 18:15:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:09,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:09,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564404017] [2021-07-09 18:15:09,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564404017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:09,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992186816] [2021-07-09 18:15:09,062 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:09,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:09,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:09,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:09,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:09,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:09,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:09,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:09,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:09,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:09,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:09,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992186816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:09,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:09,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-07-09 18:15:09,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315445643] [2021-07-09 18:15:09,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:15:09,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:09,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:15:09,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:15:09,615 INFO L87 Difference]: Start difference. First operand 5133 states and 10219 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:09,969 INFO L93 Difference]: Finished difference Result 7659 states and 15381 transitions. [2021-07-09 18:15:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:15:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:09,977 INFO L225 Difference]: With dead ends: 7659 [2021-07-09 18:15:09,977 INFO L226 Difference]: Without dead ends: 7594 [2021-07-09 18:15:09,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:15:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-07-09 18:15:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 4965. [2021-07-09 18:15:10,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 4964 states have (on average 1.984488315874295) internal successors, (9851), 4964 states have internal predecessors, (9851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 9851 transitions. [2021-07-09 18:15:10,053 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 9851 transitions. Word has length 43 [2021-07-09 18:15:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:10,053 INFO L482 AbstractCegarLoop]: Abstraction has 4965 states and 9851 transitions. [2021-07-09 18:15:10,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:10,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 9851 transitions. [2021-07-09 18:15:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:10,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:10,056 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:10,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-09 18:15:10,257 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1458838867, now seen corresponding path program 117 times [2021-07-09 18:15:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:10,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555914168] [2021-07-09 18:15:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:10,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:10,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555914168] [2021-07-09 18:15:10,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555914168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:10,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314348642] [2021-07-09 18:15:10,617 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:10,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:15:10,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:10,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:10,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:11,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:11,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:11,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:11,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:11,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:11,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:11,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314348642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:11,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:11,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-07-09 18:15:11,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424780250] [2021-07-09 18:15:11,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:15:11,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:11,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:15:11,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:15:11,193 INFO L87 Difference]: Start difference. First operand 4965 states and 9851 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:11,577 INFO L93 Difference]: Finished difference Result 6720 states and 13442 transitions. [2021-07-09 18:15:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:15:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:11,583 INFO L225 Difference]: With dead ends: 6720 [2021-07-09 18:15:11,584 INFO L226 Difference]: Without dead ends: 6615 [2021-07-09 18:15:11,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 740.6ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:15:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6615 states. [2021-07-09 18:15:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6615 to 4980. [2021-07-09 18:15:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4980 states, 4979 states have (on average 1.9847358907411126) internal successors, (9882), 4979 states have internal predecessors, (9882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4980 states to 4980 states and 9882 transitions. [2021-07-09 18:15:11,628 INFO L78 Accepts]: Start accepts. Automaton has 4980 states and 9882 transitions. Word has length 43 [2021-07-09 18:15:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:11,628 INFO L482 AbstractCegarLoop]: Abstraction has 4980 states and 9882 transitions. [2021-07-09 18:15:11,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4980 states and 9882 transitions. [2021-07-09 18:15:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:11,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:11,632 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:11,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:15:11,832 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:11,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2103144989, now seen corresponding path program 118 times [2021-07-09 18:15:11,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:11,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357829465] [2021-07-09 18:15:11,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:12,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:12,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357829465] [2021-07-09 18:15:12,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357829465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:12,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793852895] [2021-07-09 18:15:12,098 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:12,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:12,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:12,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:12,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:12,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:12,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:12,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:12,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:12,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:12,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793852895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:12,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:12,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 24 [2021-07-09 18:15:12,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421027091] [2021-07-09 18:15:12,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:15:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:15:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:15:12,601 INFO L87 Difference]: Start difference. First operand 4980 states and 9882 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:12,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:12,930 INFO L93 Difference]: Finished difference Result 6288 states and 12461 transitions. [2021-07-09 18:15:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:15:12,930 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:12,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:12,936 INFO L225 Difference]: With dead ends: 6288 [2021-07-09 18:15:12,936 INFO L226 Difference]: Without dead ends: 6061 [2021-07-09 18:15:12,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:15:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-07-09 18:15:12,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 5116. [2021-07-09 18:15:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 5115 states have (on average 1.9896383186705768) internal successors, (10177), 5115 states have internal predecessors, (10177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 10177 transitions. [2021-07-09 18:15:12,979 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 10177 transitions. Word has length 43 [2021-07-09 18:15:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:12,979 INFO L482 AbstractCegarLoop]: Abstraction has 5116 states and 10177 transitions. [2021-07-09 18:15:12,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 10177 transitions. [2021-07-09 18:15:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:12,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:12,983 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:13,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:13,183 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:13,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:13,184 INFO L82 PathProgramCache]: Analyzing trace with hash -642485277, now seen corresponding path program 119 times [2021-07-09 18:15:13,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:13,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095389966] [2021-07-09 18:15:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:13,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:13,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095389966] [2021-07-09 18:15:13,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095389966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:13,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497731989] [2021-07-09 18:15:13,463 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:13,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:15:13,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:13,491 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:13,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:13,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:13,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:13,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:13,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:13,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:13,999 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:14,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497731989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:14,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:14,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-07-09 18:15:14,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359844875] [2021-07-09 18:15:14,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:15:14,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:14,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:15:14,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:14,000 INFO L87 Difference]: Start difference. First operand 5116 states and 10177 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-09 18:15:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:14,387 INFO L93 Difference]: Finished difference Result 6874 states and 13706 transitions. [2021-07-09 18:15:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:15:14,387 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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 43 [2021-07-09 18:15:14,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:14,395 INFO L225 Difference]: With dead ends: 6874 [2021-07-09 18:15:14,395 INFO L226 Difference]: Without dead ends: 6829 [2021-07-09 18:15:14,395 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 637.0ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:15:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-07-09 18:15:14,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 5057. [2021-07-09 18:15:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5057 states, 5056 states have (on average 1.987737341772152) internal successors, (10050), 5056 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:14,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5057 states to 5057 states and 10050 transitions. [2021-07-09 18:15:14,443 INFO L78 Accepts]: Start accepts. Automaton has 5057 states and 10050 transitions. Word has length 43 [2021-07-09 18:15:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:14,443 INFO L482 AbstractCegarLoop]: Abstraction has 5057 states and 10050 transitions. [2021-07-09 18:15:14,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 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) [2021-07-09 18:15:14,444 INFO L276 IsEmpty]: Start isEmpty. Operand 5057 states and 10050 transitions. [2021-07-09 18:15:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:14,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:14,447 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:14,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:15:14,648 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:14,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:14,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1402807837, now seen corresponding path program 120 times [2021-07-09 18:15:14,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:14,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731355082] [2021-07-09 18:15:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:14,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:14,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731355082] [2021-07-09 18:15:14,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731355082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:14,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282687305] [2021-07-09 18:15:14,948 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:14,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:15:14,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:14,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-07-09 18:15:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:15,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:15,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:15,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:15,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 55 [2021-07-09 18:15:15,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:15,895 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-07-09 18:15:15,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:15,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:159, output treesize:7 [2021-07-09 18:15:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:15,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282687305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:15,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:15,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-07-09 18:15:15,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854532102] [2021-07-09 18:15:15,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:15:15,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:15,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:15:15,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:15:15,905 INFO L87 Difference]: Start difference. First operand 5057 states and 10050 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:18,469 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-07-09 18:15:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:20,922 INFO L93 Difference]: Finished difference Result 7825 states and 15639 transitions. [2021-07-09 18:15:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:15:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:20,932 INFO L225 Difference]: With dead ends: 7825 [2021-07-09 18:15:20,932 INFO L226 Difference]: Without dead ends: 7519 [2021-07-09 18:15:20,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 3398.5ms TimeCoverageRelationStatistics Valid=210, Invalid=1860, Unknown=0, NotChecked=0, Total=2070 [2021-07-09 18:15:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2021-07-09 18:15:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 5176. [2021-07-09 18:15:21,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-07-09 18:15:21,006 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-07-09 18:15:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:21,006 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-07-09 18:15:21,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-07-09 18:15:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:21,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:21,010 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:21,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:21,211 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1928347677, now seen corresponding path program 121 times [2021-07-09 18:15:21,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:21,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090971828] [2021-07-09 18:15:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:21,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:21,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090971828] [2021-07-09 18:15:21,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090971828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:21,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092595297] [2021-07-09 18:15:21,540 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:21,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:22,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:22,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:22,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:22,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:22,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:22,092 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:22,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092595297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:22,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:22,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-07-09 18:15:22,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311374451] [2021-07-09 18:15:22,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:15:22,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:22,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:15:22,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:15:22,093 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:22,480 INFO L93 Difference]: Finished difference Result 6970 states and 13987 transitions. [2021-07-09 18:15:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:15:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-07-09 18:15:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:22,488 INFO L225 Difference]: With dead ends: 6970 [2021-07-09 18:15:22,488 INFO L226 Difference]: Without dead ends: 6925 [2021-07-09 18:15:22,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:15:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2021-07-09 18:15:22,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 5176. [2021-07-09 18:15:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 5175 states have (on average 1.991304347826087) internal successors, (10305), 5175 states have internal predecessors, (10305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 10305 transitions. [2021-07-09 18:15:22,537 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 10305 transitions. Word has length 43 [2021-07-09 18:15:22,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:22,537 INFO L482 AbstractCegarLoop]: Abstraction has 5176 states and 10305 transitions. [2021-07-09 18:15:22,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 10305 transitions. [2021-07-09 18:15:22,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-07-09 18:15:22,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:22,541 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:22,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:15:22,742 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:22,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:22,742 INFO L82 PathProgramCache]: Analyzing trace with hash 945298195, now seen corresponding path program 122 times [2021-07-09 18:15:22,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:22,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032754763] [2021-07-09 18:15:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:23,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:23,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032754763] [2021-07-09 18:15:23,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032754763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:23,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063472301] [2021-07-09 18:15:23,081 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:23,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:23,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:23,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:23,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:23,514 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-07-09 18:15:23,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:23,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:23,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:23,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-07-09 18:15:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:23,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063472301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:23,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:23,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-07-09 18:15:23,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854033043] [2021-07-09 18:15:23,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:15:23,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:23,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:15:23,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:15:23,527 INFO L87 Difference]: Start difference. First operand 5176 states and 10305 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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) [2021-07-09 18:15:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:23,908 INFO L93 Difference]: Finished difference Result 6778 states and 13577 transitions. [2021-07-09 18:15:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:15:23,909 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 43 [2021-07-09 18:15:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:23,916 INFO L225 Difference]: With dead ends: 6778 [2021-07-09 18:15:23,916 INFO L226 Difference]: Without dead ends: 6763 [2021-07-09 18:15:23,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:15:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-07-09 18:15:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 5183. [2021-07-09 18:15:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 1.991509069857198) internal successors, (10320), 5182 states have internal predecessors, (10320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 10320 transitions. [2021-07-09 18:15:23,967 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 10320 transitions. Word has length 43 [2021-07-09 18:15:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:23,967 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 10320 transitions. [2021-07-09 18:15:23,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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) [2021-07-09 18:15:23,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 10320 transitions. [2021-07-09 18:15:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:15:23,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:23,972 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:24,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:24,185 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1365327806, now seen corresponding path program 123 times [2021-07-09 18:15:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:24,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451817902] [2021-07-09 18:15:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:15:24,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:24,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451817902] [2021-07-09 18:15:24,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451817902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:24,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101041371] [2021-07-09 18:15:24,233 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:24,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:15:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:15:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 53 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:15:24,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101041371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:24,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:24,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 18:15:24,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265024755] [2021-07-09 18:15:24,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:15:24,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:24,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:15:24,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:15:24,328 INFO L87 Difference]: Start difference. First operand 5183 states and 10320 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:24,368 INFO L93 Difference]: Finished difference Result 5616 states and 11180 transitions. [2021-07-09 18:15:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:15:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 18:15:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:24,373 INFO L225 Difference]: With dead ends: 5616 [2021-07-09 18:15:24,373 INFO L226 Difference]: Without dead ends: 5602 [2021-07-09 18:15:24,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:15:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5602 states. [2021-07-09 18:15:24,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5602 to 5194. [2021-07-09 18:15:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5194 states, 5193 states have (on average 1.9924898902368573) internal successors, (10347), 5193 states have internal predecessors, (10347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 10347 transitions. [2021-07-09 18:15:24,422 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 10347 transitions. Word has length 44 [2021-07-09 18:15:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:24,422 INFO L482 AbstractCegarLoop]: Abstraction has 5194 states and 10347 transitions. [2021-07-09 18:15:24,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 10347 transitions. [2021-07-09 18:15:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 18:15:24,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:24,426 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:24,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:15:24,627 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:24,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:24,627 INFO L82 PathProgramCache]: Analyzing trace with hash -930359854, now seen corresponding path program 124 times [2021-07-09 18:15:24,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:24,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205879914] [2021-07-09 18:15:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:24,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205879914] [2021-07-09 18:15:24,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205879914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:24,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873788013] [2021-07-09 18:15:24,686 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:24,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:24,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:24,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:15:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:24,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873788013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:24,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:24,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 18:15:24,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533546188] [2021-07-09 18:15:24,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:15:24,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:24,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:15:24,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:15:24,792 INFO L87 Difference]: Start difference. First operand 5194 states and 10347 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-07-09 18:15:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:24,843 INFO L93 Difference]: Finished difference Result 5677 states and 11327 transitions. [2021-07-09 18:15:24,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:15:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 44 [2021-07-09 18:15:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:24,849 INFO L225 Difference]: With dead ends: 5677 [2021-07-09 18:15:24,849 INFO L226 Difference]: Without dead ends: 5668 [2021-07-09 18:15:24,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:15:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5668 states. [2021-07-09 18:15:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5668 to 5257. [2021-07-09 18:15:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5256 states have (on average 1.995433789954338) internal successors, (10488), 5256 states have internal predecessors, (10488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 10488 transitions. [2021-07-09 18:15:24,903 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 10488 transitions. Word has length 44 [2021-07-09 18:15:24,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:24,904 INFO L482 AbstractCegarLoop]: Abstraction has 5257 states and 10488 transitions. [2021-07-09 18:15:24,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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) [2021-07-09 18:15:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 10488 transitions. [2021-07-09 18:15:24,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-09 18:15:24,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:24,908 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:25,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:15:25,108 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:25,108 INFO L82 PathProgramCache]: Analyzing trace with hash -748801414, now seen corresponding path program 125 times [2021-07-09 18:15:25,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:25,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098028565] [2021-07-09 18:15:25,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:25,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:25,434 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:25,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098028565] [2021-07-09 18:15:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098028565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861855236] [2021-07-09 18:15:25,434 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:25,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 18:15:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:25,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 65 conjunts are in the unsatisfiable core [2021-07-09 18:15:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:25,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:25,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 55 [2021-07-09 18:15:25,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:25,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:25,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:25,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-07-09 18:15:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:26,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861855236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:26,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:26,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 27 [2021-07-09 18:15:26,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411388360] [2021-07-09 18:15:26,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:15:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:26,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:15:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:15:26,007 INFO L87 Difference]: Start difference. First operand 5257 states and 10488 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:27,933 INFO L93 Difference]: Finished difference Result 8586 states and 17459 transitions. [2021-07-09 18:15:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:15:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-07-09 18:15:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:27,943 INFO L225 Difference]: With dead ends: 8586 [2021-07-09 18:15:27,943 INFO L226 Difference]: Without dead ends: 8466 [2021-07-09 18:15:27,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2072.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:15:27,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-07-09 18:15:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 5282. [2021-07-09 18:15:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5282 states, 5281 states have (on average 1.996212838477561) internal successors, (10542), 5281 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5282 states to 5282 states and 10542 transitions. [2021-07-09 18:15:27,999 INFO L78 Accepts]: Start accepts. Automaton has 5282 states and 10542 transitions. Word has length 46 [2021-07-09 18:15:27,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:27,999 INFO L482 AbstractCegarLoop]: Abstraction has 5282 states and 10542 transitions. [2021-07-09 18:15:27,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5282 states and 10542 transitions. [2021-07-09 18:15:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:28,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:28,019 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:28,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:28,220 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash 91309083, now seen corresponding path program 126 times [2021-07-09 18:15:28,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:28,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287247477] [2021-07-09 18:15:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:28,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:28,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287247477] [2021-07-09 18:15:28,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287247477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:28,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405054074] [2021-07-09 18:15:28,532 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:28,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:15:28,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:28,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:15:28,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:29,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:29,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-09 18:15:29,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:29,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:29,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:29,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-09 18:15:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:29,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405054074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:29,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:29,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-09 18:15:29,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162744008] [2021-07-09 18:15:29,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:29,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:29,430 INFO L87 Difference]: Start difference. First operand 5282 states and 10542 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:30,161 INFO L93 Difference]: Finished difference Result 9697 states and 19645 transitions. [2021-07-09 18:15:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:15:30,162 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:30,173 INFO L225 Difference]: With dead ends: 9697 [2021-07-09 18:15:30,173 INFO L226 Difference]: Without dead ends: 9575 [2021-07-09 18:15:30,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 971.7ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9575 states. [2021-07-09 18:15:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9575 to 5303. [2021-07-09 18:15:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5303 states, 5302 states have (on average 1.99622783855149) internal successors, (10584), 5302 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 10584 transitions. [2021-07-09 18:15:30,236 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 10584 transitions. Word has length 47 [2021-07-09 18:15:30,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:30,236 INFO L482 AbstractCegarLoop]: Abstraction has 5303 states and 10584 transitions. [2021-07-09 18:15:30,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:30,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 10584 transitions. [2021-07-09 18:15:30,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:30,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:30,240 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:30,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:30,441 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:30,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:30,441 INFO L82 PathProgramCache]: Analyzing trace with hash 590250667, now seen corresponding path program 127 times [2021-07-09 18:15:30,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:30,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035615231] [2021-07-09 18:15:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:30,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:30,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035615231] [2021-07-09 18:15:30,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035615231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:30,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469913324] [2021-07-09 18:15:30,756 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:30,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-09 18:15:30,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:31,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:31,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:31,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-07-09 18:15:31,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:31,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:31,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:31,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-07-09 18:15:31,667 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:31,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469913324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:31,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:31,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-09 18:15:31,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700512073] [2021-07-09 18:15:31,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:31,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:31,668 INFO L87 Difference]: Start difference. First operand 5303 states and 10584 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:32,371 INFO L93 Difference]: Finished difference Result 9274 states and 18836 transitions. [2021-07-09 18:15:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:15:32,371 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:32,383 INFO L225 Difference]: With dead ends: 9274 [2021-07-09 18:15:32,383 INFO L226 Difference]: Without dead ends: 9152 [2021-07-09 18:15:32,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 975.6ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9152 states. [2021-07-09 18:15:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9152 to 5363. [2021-07-09 18:15:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 1.9962700484893696) internal successors, (10704), 5362 states have internal predecessors, (10704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:32,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 10704 transitions. [2021-07-09 18:15:32,469 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 10704 transitions. Word has length 47 [2021-07-09 18:15:32,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:32,469 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 10704 transitions. [2021-07-09 18:15:32,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:32,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 10704 transitions. [2021-07-09 18:15:32,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:32,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:32,473 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:32,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:32,673 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:32,674 INFO L82 PathProgramCache]: Analyzing trace with hash -533528613, now seen corresponding path program 128 times [2021-07-09 18:15:32,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:32,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678122202] [2021-07-09 18:15:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:32,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:32,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678122202] [2021-07-09 18:15:32,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678122202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:32,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588246290] [2021-07-09 18:15:32,984 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:33,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:33,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:15:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:33,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:33,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-09 18:15:33,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:33,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:33,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:33,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-09 18:15:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:33,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588246290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:33,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:33,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-07-09 18:15:33,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596935895] [2021-07-09 18:15:33,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:15:33,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:33,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:15:33,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:15:33,906 INFO L87 Difference]: Start difference. First operand 5363 states and 10704 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:34,599 INFO L93 Difference]: Finished difference Result 9393 states and 18931 transitions. [2021-07-09 18:15:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:15:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:34,610 INFO L225 Difference]: With dead ends: 9393 [2021-07-09 18:15:34,610 INFO L226 Difference]: Without dead ends: 9327 [2021-07-09 18:15:34,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 979.1ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:15:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9327 states. [2021-07-09 18:15:34,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9327 to 5330. [2021-07-09 18:15:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.9941827735034716) internal successors, (10627), 5329 states have internal predecessors, (10627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10627 transitions. [2021-07-09 18:15:34,677 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10627 transitions. Word has length 47 [2021-07-09 18:15:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:34,677 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10627 transitions. [2021-07-09 18:15:34,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10627 transitions. [2021-07-09 18:15:34,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:34,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:34,681 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:34,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:34,883 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:34,883 INFO L82 PathProgramCache]: Analyzing trace with hash 499962331, now seen corresponding path program 129 times [2021-07-09 18:15:34,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:34,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668381163] [2021-07-09 18:15:34,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:35,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668381163] [2021-07-09 18:15:35,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668381163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647731410] [2021-07-09 18:15:35,238 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:35,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 18:15:35,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:35,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-09 18:15:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:36,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:36,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:36,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-09 18:15:36,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:36,345 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-07-09 18:15:36,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:36,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-07-09 18:15:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:36,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647731410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:36,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:36,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-09 18:15:36,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943373129] [2021-07-09 18:15:36,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:36,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:36,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:36,355 INFO L87 Difference]: Start difference. First operand 5330 states and 10627 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:39,907 INFO L93 Difference]: Finished difference Result 9678 states and 19547 transitions. [2021-07-09 18:15:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:15:39,907 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:39,919 INFO L225 Difference]: With dead ends: 9678 [2021-07-09 18:15:39,919 INFO L226 Difference]: Without dead ends: 9218 [2021-07-09 18:15:39,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3455.1ms TimeCoverageRelationStatistics Valid=330, Invalid=3830, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:15:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9218 states. [2021-07-09 18:15:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9218 to 5507. [2021-07-09 18:15:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 1.995277878677806) internal successors, (10986), 5506 states have internal predecessors, (10986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:39,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 10986 transitions. [2021-07-09 18:15:39,987 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 10986 transitions. Word has length 47 [2021-07-09 18:15:39,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:39,987 INFO L482 AbstractCegarLoop]: Abstraction has 5507 states and 10986 transitions. [2021-07-09 18:15:39,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:39,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 10986 transitions. [2021-07-09 18:15:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:39,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:39,992 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:40,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:15:40,192 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1480573845, now seen corresponding path program 130 times [2021-07-09 18:15:40,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:40,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169318895] [2021-07-09 18:15:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:40,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:40,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169318895] [2021-07-09 18:15:40,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169318895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:40,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923659608] [2021-07-09 18:15:40,549 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:40,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:15:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:40,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-07-09 18:15:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:41,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:41,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 166 treesize of output 60 [2021-07-09 18:15:41,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:41,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:41,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-07-09 18:15:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:41,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923659608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:41,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:41,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-09 18:15:41,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522393822] [2021-07-09 18:15:41,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:41,476 INFO L87 Difference]: Start difference. First operand 5507 states and 10986 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:41,974 INFO L93 Difference]: Finished difference Result 8590 states and 17250 transitions. [2021-07-09 18:15:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:15:41,974 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:41,984 INFO L225 Difference]: With dead ends: 8590 [2021-07-09 18:15:41,984 INFO L226 Difference]: Without dead ends: 8567 [2021-07-09 18:15:41,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1040.2ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-07-09 18:15:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 5513. [2021-07-09 18:15:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 1.9954644412191582) internal successors, (10999), 5512 states have internal predecessors, (10999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 10999 transitions. [2021-07-09 18:15:42,064 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 10999 transitions. Word has length 47 [2021-07-09 18:15:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:42,065 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 10999 transitions. [2021-07-09 18:15:42,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 10999 transitions. [2021-07-09 18:15:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:42,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:42,069 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:42,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:15:42,269 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1502990453, now seen corresponding path program 131 times [2021-07-09 18:15:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:42,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592391428] [2021-07-09 18:15:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:42,605 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:42,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:42,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592391428] [2021-07-09 18:15:42,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592391428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:42,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730198555] [2021-07-09 18:15:42,605 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:42,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:15:42,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:42,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-07-09 18:15:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:43,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:43,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:43,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-09 18:15:43,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:43,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:43,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:43,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-09 18:15:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:43,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730198555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:43,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:43,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-09 18:15:43,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161310348] [2021-07-09 18:15:43,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:43,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:43,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:43,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:43,540 INFO L87 Difference]: Start difference. First operand 5513 states and 10999 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:44,222 INFO L93 Difference]: Finished difference Result 11538 states and 23485 transitions. [2021-07-09 18:15:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:15:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:44,236 INFO L225 Difference]: With dead ends: 11538 [2021-07-09 18:15:44,236 INFO L226 Difference]: Without dead ends: 11355 [2021-07-09 18:15:44,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1021.2ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-07-09 18:15:44,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 5330. [2021-07-09 18:15:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5329 states have (on average 1.99962469506474) internal successors, (10656), 5329 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 10656 transitions. [2021-07-09 18:15:44,311 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 10656 transitions. Word has length 47 [2021-07-09 18:15:44,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:44,311 INFO L482 AbstractCegarLoop]: Abstraction has 5330 states and 10656 transitions. [2021-07-09 18:15:44,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 10656 transitions. [2021-07-09 18:15:44,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:44,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:44,316 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:44,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:15:44,516 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:44,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:44,517 INFO L82 PathProgramCache]: Analyzing trace with hash -158396757, now seen corresponding path program 132 times [2021-07-09 18:15:44,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:44,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919527913] [2021-07-09 18:15:44,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:44,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:44,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:44,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919527913] [2021-07-09 18:15:44,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919527913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:44,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311591114] [2021-07-09 18:15:44,793 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:44,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 18:15:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:44,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:15:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:45,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:45,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:45,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-09 18:15:45,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:45,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:45,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:45,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-09 18:15:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:45,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311591114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:45,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:45,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-07-09 18:15:45,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011182879] [2021-07-09 18:15:45,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:15:45,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:45,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:15:45,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:15:45,680 INFO L87 Difference]: Start difference. First operand 5330 states and 10656 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:46,684 INFO L93 Difference]: Finished difference Result 6335 states and 12694 transitions. [2021-07-09 18:15:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:15:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:46,690 INFO L225 Difference]: With dead ends: 6335 [2021-07-09 18:15:46,690 INFO L226 Difference]: Without dead ends: 6300 [2021-07-09 18:15:46,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1300.5ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:15:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2021-07-09 18:15:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 4817. [2021-07-09 18:15:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4817 states, 4816 states have (on average 1.995016611295681) internal successors, (9608), 4816 states have internal predecessors, (9608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4817 states to 4817 states and 9608 transitions. [2021-07-09 18:15:46,738 INFO L78 Accepts]: Start accepts. Automaton has 4817 states and 9608 transitions. Word has length 47 [2021-07-09 18:15:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:46,738 INFO L482 AbstractCegarLoop]: Abstraction has 4817 states and 9608 transitions. [2021-07-09 18:15:46,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4817 states and 9608 transitions. [2021-07-09 18:15:46,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:46,742 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:46,742 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:46,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:46,943 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:46,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:46,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1004048869, now seen corresponding path program 133 times [2021-07-09 18:15:46,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:46,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143312815] [2021-07-09 18:15:46,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:47,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143312815] [2021-07-09 18:15:47,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143312815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:47,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413044246] [2021-07-09 18:15:47,290 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:47,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:15:47,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:48,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:48,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:48,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-09 18:15:48,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:48,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:48,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:48,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-09 18:15:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:48,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413044246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:48,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:48,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-07-09 18:15:48,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905365986] [2021-07-09 18:15:48,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-09 18:15:48,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-09 18:15:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:48,224 INFO L87 Difference]: Start difference. First operand 4817 states and 9608 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:48,790 INFO L93 Difference]: Finished difference Result 9532 states and 19425 transitions. [2021-07-09 18:15:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:15:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:48,803 INFO L225 Difference]: With dead ends: 9532 [2021-07-09 18:15:48,803 INFO L226 Difference]: Without dead ends: 9364 [2021-07-09 18:15:48,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1049.4ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:15:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9364 states. [2021-07-09 18:15:48,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9364 to 4844. [2021-07-09 18:15:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4844 states, 4843 states have (on average 1.993392525294239) internal successors, (9654), 4843 states have internal predecessors, (9654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 9654 transitions. [2021-07-09 18:15:48,868 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 9654 transitions. Word has length 47 [2021-07-09 18:15:48,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:48,868 INFO L482 AbstractCegarLoop]: Abstraction has 4844 states and 9654 transitions. [2021-07-09 18:15:48,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 36 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:48,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 9654 transitions. [2021-07-09 18:15:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:48,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:48,872 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:49,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-09 18:15:49,072 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:49,072 INFO L82 PathProgramCache]: Analyzing trace with hash -248685093, now seen corresponding path program 134 times [2021-07-09 18:15:49,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:49,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748111756] [2021-07-09 18:15:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:49,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:49,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748111756] [2021-07-09 18:15:49,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748111756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:49,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318537902] [2021-07-09 18:15:49,352 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:49,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:15:49,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:49,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-07-09 18:15:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:15:50,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:15:50,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:15:50,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-07-09 18:15:50,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:15:50,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:15:50,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:15:50,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-07-09 18:15:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:50,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318537902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:50,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:15:50,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-07-09 18:15:50,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697625026] [2021-07-09 18:15:50,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:15:50,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:15:50,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:15:50,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:15:50,250 INFO L87 Difference]: Start difference. First operand 4844 states and 9654 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:15:51,293 INFO L93 Difference]: Finished difference Result 6513 states and 13009 transitions. [2021-07-09 18:15:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:15:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 18:15:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:15:51,299 INFO L225 Difference]: With dead ends: 6513 [2021-07-09 18:15:51,299 INFO L226 Difference]: Without dead ends: 6115 [2021-07-09 18:15:51,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1389.4ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:15:51,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2021-07-09 18:15:51,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 4875. [2021-07-09 18:15:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4875 states, 4874 states have (on average 1.9883052933935166) internal successors, (9691), 4874 states have internal predecessors, (9691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:51,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4875 states to 4875 states and 9691 transitions. [2021-07-09 18:15:51,344 INFO L78 Accepts]: Start accepts. Automaton has 4875 states and 9691 transitions. Word has length 47 [2021-07-09 18:15:51,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:15:51,344 INFO L482 AbstractCegarLoop]: Abstraction has 4875 states and 9691 transitions. [2021-07-09 18:15:51,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:15:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 4875 states and 9691 transitions. [2021-07-09 18:15:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 18:15:51,348 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:15:51,348 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:15:51,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:51,548 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:15:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:15:51,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2127828149, now seen corresponding path program 135 times [2021-07-09 18:15:51,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:15:51,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239689669] [2021-07-09 18:15:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:15:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:15:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:15:51,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:15:51,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239689669] [2021-07-09 18:15:51,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239689669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:15:51,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642325181] [2021-07-09 18:15:51,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:15:51,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 18:15:51,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:15:51,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 71 conjunts are in the unsatisfiable core [2021-07-09 18:15:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:36,430 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-07-09 18:17:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:36,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:36,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 36 disjoint index pairs (out of 136 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 60 [2021-07-09 18:17:36,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:36,525 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.1 percent of original size [2021-07-09 18:17:36,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:36,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:181, output treesize:7 [2021-07-09 18:17:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 134 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:36,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642325181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:36,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:36,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-07-09 18:17:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860923259] [2021-07-09 18:17:36,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-09 18:17:36,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-09 18:17:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1120, Unknown=29, NotChecked=0, Total=1260 [2021-07-09 18:17:36,535 INFO L87 Difference]: Start difference. First operand 4875 states and 9691 transitions. Second operand has 36 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,781 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-07-09 18:18:51,195 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-07-09 18:19:43,128 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-09 18:20:12,096 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-07-09 18:20:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:20:12,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:12,298 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:847) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:761) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-07-09 18:20:12,303 INFO L168 Benchmark]: Toolchain (without parser) took 849037.13 ms. Allocated memory was 178.3 MB in the beginning and 640.7 MB in the end (delta: 462.4 MB). Free memory was 158.2 MB in the beginning and 537.1 MB in the end (delta: -378.9 MB). Peak memory consumption was 83.3 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:12,303 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 178.3 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:20:12,303 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.64 ms. Allocated memory is still 178.3 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:20:12,303 INFO L168 Benchmark]: Boogie Preprocessor took 12.67 ms. Allocated memory is still 178.3 MB. Free memory was 156.7 MB in the beginning and 155.7 MB in the end (delta: 963.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:12,303 INFO L168 Benchmark]: RCFGBuilder took 288.51 ms. Allocated memory is still 178.3 MB. Free memory was 155.7 MB in the beginning and 143.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:12,303 INFO L168 Benchmark]: TraceAbstraction took 848712.99 ms. Allocated memory was 178.3 MB in the beginning and 640.7 MB in the end (delta: 462.4 MB). Free memory was 143.2 MB in the beginning and 537.1 MB in the end (delta: -393.9 MB). Peak memory consumption was 68.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:20:12,303 INFO L339 ainManager$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 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.64 ms. Allocated memory is still 178.3 MB. Free memory was 158.1 MB in the beginning and 156.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.67 ms. Allocated memory is still 178.3 MB. Free memory was 156.7 MB in the beginning and 155.7 MB in the end (delta: 963.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.51 ms. Allocated memory is still 178.3 MB. Free memory was 155.7 MB in the beginning and 143.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 848712.99 ms. Allocated memory was 178.3 MB in the beginning and 640.7 MB in the end (delta: 462.4 MB). Free memory was 143.2 MB in the beginning and 537.1 MB in the end (delta: -393.9 MB). Peak memory consumption was 68.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...