/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:11:13,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:11:13,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:11:13,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:11:13,676 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 [2021-03-10 23:11:13,695 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:11:13,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:11:13,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:11:13,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:11:13,698 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:11:13,698 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:11:13,698 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:11:13,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:11:13,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:11:13,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:11:13,700 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:11:13,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:11:13,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:11:13,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:11:13,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:11:13,701 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:11:13,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:11:13,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:11:13,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:11:13,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:11:13,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:11:13,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:11:13,702 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:11:13,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:11:13,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:11:14,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:11:14,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:11:14,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:11:14,114 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:11:14,118 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:11:14,119 INFO L432 ainManager$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 [2021-03-10 23:11:14,120 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-03-10 23:11:14,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:11:14,153 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:11:14,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:11:14,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:11:14,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:11:14,166 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,174 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:11:14,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:11:14,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:11:14,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:11:14,191 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,192 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,192 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,193 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,195 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,198 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,199 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 10.03 11:11:14" (1/1) ... [2021-03-10 23:11:14,199 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:11:14,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:11:14,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:11:14,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:11:14,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:11:14" (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 [2021-03-10 23:11:14,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:11:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:11:14,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:11:14,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:11:14,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:11:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:11:14,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:11:14,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:11:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:11:14,264 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:11:14,516 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:11:14,517 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 23:11:14,518 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 23:11:14,519 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:11:14 BoogieIcfgContainer [2021-03-10 23:11:14,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:11:14,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:11:14,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:11:14,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:11:14,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:11:14" (1/2) ... [2021-03-10 23:11:14,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de7048e and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:11:14, skipping insertion in model container [2021-03-10 23:11:14,525 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 10.03 11:11:14" (2/2) ... [2021-03-10 23:11:14,544 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-03-10 23:11:14,549 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:11:14,549 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:11:14,553 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:11:14,554 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:11:14,626 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 23:11:14,651 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 23:11:14,685 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:11:14,685 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:11:14,685 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:11:14,685 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:11:14,685 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:11:14,685 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:11:14,687 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:11:14,687 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:11:14,700 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-03-10 23:11:14,723 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 23:11:14,732 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:14,733 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:14,733 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-03-10 23:11:14,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:14,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505613940] [2021-03-10 23:11:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:14,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505613940] [2021-03-10 23:11:14,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:11:14,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:11:14,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137701124] [2021-03-10 23:11:14,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:11:14,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:14,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:11:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:11:14,973 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-03-10 23:11:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:15,003 INFO L93 Difference]: Finished difference Result 42 states and 82 transitions. [2021-03-10 23:11:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:11:15,006 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 [2021-03-10 23:11:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:15,017 INFO L225 Difference]: With dead ends: 42 [2021-03-10 23:11:15,017 INFO L226 Difference]: Without dead ends: 30 [2021-03-10 23:11:15,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:11:15,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-03-10 23:11:15,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-03-10 23:11:15,051 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) [2021-03-10 23:11:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-03-10 23:11:15,054 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-03-10 23:11:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:15,055 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-03-10 23:11:15,055 INFO L481 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) [2021-03-10 23:11:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-03-10 23:11:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 23:11:15,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:15,057 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:15,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:11:15,058 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:15,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:15,063 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-03-10 23:11:15,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:15,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761416862] [2021-03-10 23:11:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:15,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761416862] [2021-03-10 23:11:15,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:11:15,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 23:11:15,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663080261] [2021-03-10 23:11:15,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:11:15,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:11:15,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:11:15,117 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) [2021-03-10 23:11:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:15,125 INFO L93 Difference]: Finished difference Result 32 states and 57 transitions. [2021-03-10 23:11:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:11:15,126 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 [2021-03-10 23:11:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:15,127 INFO L225 Difference]: With dead ends: 32 [2021-03-10 23:11:15,127 INFO L226 Difference]: Without dead ends: 31 [2021-03-10 23:11:15,128 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:11:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-03-10 23:11:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-03-10 23:11:15,132 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) [2021-03-10 23:11:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-03-10 23:11:15,133 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-03-10 23:11:15,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:15,133 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-03-10 23:11:15,133 INFO L481 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) [2021-03-10 23:11:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-03-10 23:11:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:11:15,134 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:15,134 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:15,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 23:11:15,135 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:15,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-03-10 23:11:15,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:15,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50556731] [2021-03-10 23:11:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:15,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:15,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50556731] [2021-03-10 23:11:15,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643839119] [2021-03-10 23:11:15,210 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 [2021-03-10 23:11:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:11:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:15,365 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 [2021-03-10 23:11:15,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:15,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:15,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:15,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-03-10 23:11:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:15,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:15,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 23:11:15,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137335928] [2021-03-10 23:11:15,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:11:15,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:15,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:11:15,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:11:15,399 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) [2021-03-10 23:11:15,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:15,509 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-03-10 23:11:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:11:15,510 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 [2021-03-10 23:11:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:15,512 INFO L225 Difference]: With dead ends: 52 [2021-03-10 23:11:15,513 INFO L226 Difference]: Without dead ends: 41 [2021-03-10 23:11:15,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:11:15,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-03-10 23:11:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-03-10 23:11:15,523 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) [2021-03-10 23:11:15,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-03-10 23:11:15,524 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-03-10 23:11:15,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:15,524 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-03-10 23:11:15,524 INFO L481 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) [2021-03-10 23:11:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-03-10 23:11:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 23:11:15,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:15,525 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:15,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-03-10 23:11:15,726 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-03-10 23:11:15,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:15,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027744257] [2021-03-10 23:11:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:11:15,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027744257] [2021-03-10 23:11:15,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:11:15,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:11:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978451436] [2021-03-10 23:11:15,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:11:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:11:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:11:15,752 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) [2021-03-10 23:11:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:15,764 INFO L93 Difference]: Finished difference Result 40 states and 75 transitions. [2021-03-10 23:11:15,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:11:15,766 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 [2021-03-10 23:11:15,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:15,768 INFO L225 Difference]: With dead ends: 40 [2021-03-10 23:11:15,768 INFO L226 Difference]: Without dead ends: 40 [2021-03-10 23:11:15,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:11:15,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-03-10 23:11:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-03-10 23:11:15,773 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) [2021-03-10 23:11:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-03-10 23:11:15,773 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-03-10 23:11:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:15,774 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-03-10 23:11:15,774 INFO L481 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) [2021-03-10 23:11:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-03-10 23:11:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:11:15,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:15,774 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:15,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 23:11:15,775 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:15,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-03-10 23:11:15,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:15,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429976422] [2021-03-10 23:11:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:15,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429976422] [2021-03-10 23:11:15,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:11:15,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 23:11:15,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341023789] [2021-03-10 23:11:15,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 23:11:15,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 23:11:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:11:15,821 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) [2021-03-10 23:11:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:15,853 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2021-03-10 23:11:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:11:15,855 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 [2021-03-10 23:11:15,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:15,858 INFO L225 Difference]: With dead ends: 86 [2021-03-10 23:11:15,858 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 23:11:15,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-03-10 23:11:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 23:11:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-03-10 23:11:15,870 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) [2021-03-10 23:11:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-03-10 23:11:15,871 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-03-10 23:11:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:15,871 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-03-10 23:11:15,871 INFO L481 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) [2021-03-10 23:11:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-03-10 23:11:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:11:15,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:15,872 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:15,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 23:11:15,872 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-03-10 23:11:15,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:15,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094697985] [2021-03-10 23:11:15,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:11:15,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094697985] [2021-03-10 23:11:15,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624943148] [2021-03-10 23:11:15,906 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:15,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:11:15,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:15,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 23:11:15,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:15,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:11:15,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:15,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 23:11:15,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492829894] [2021-03-10 23:11:15,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 23:11:15,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:15,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 23:11:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:11:15,996 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) [2021-03-10 23:11:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:16,005 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-03-10 23:11:16,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 23:11:16,006 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 [2021-03-10 23:11:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:16,006 INFO L225 Difference]: With dead ends: 79 [2021-03-10 23:11:16,006 INFO L226 Difference]: Without dead ends: 79 [2021-03-10 23:11:16,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 23:11:16,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-10 23:11:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-03-10 23:11:16,015 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) [2021-03-10 23:11:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-03-10 23:11:16,016 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-03-10 23:11:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:16,016 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-03-10 23:11:16,016 INFO L481 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) [2021-03-10 23:11:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-03-10 23:11:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:11:16,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:16,017 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:16,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:16,223 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:16,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-03-10 23:11:16,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:16,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070873191] [2021-03-10 23:11:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:16,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070873191] [2021-03-10 23:11:16,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135988515] [2021-03-10 23:11:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 23:11:16,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:16,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:16,583 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 [2021-03-10 23:11:16,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:16,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:16,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:16,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-03-10 23:11:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:16,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:16,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 23:11:16,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714712599] [2021-03-10 23:11:16,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:11:16,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:11:16,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:11:16,620 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) [2021-03-10 23:11:16,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:16,691 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-03-10 23:11:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:11:16,700 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 [2021-03-10 23:11:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:16,702 INFO L225 Difference]: With dead ends: 106 [2021-03-10 23:11:16,702 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 23:11:16,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:11:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 23:11:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-03-10 23:11:16,707 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) [2021-03-10 23:11:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-03-10 23:11:16,708 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-03-10 23:11:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:16,708 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-03-10 23:11:16,708 INFO L481 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) [2021-03-10 23:11:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-03-10 23:11:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 23:11:16,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:16,709 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:16,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:16,924 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:16,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:16,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-03-10 23:11:16,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:16,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871606905] [2021-03-10 23:11:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:17,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871606905] [2021-03-10 23:11:17,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747074034] [2021-03-10 23:11:17,034 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 [2021-03-10 23:11:17,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:17,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 23:11:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:17,169 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-03-10 23:11:17,169 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 [2021-03-10 23:11:17,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:17,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:17,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:17,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-03-10 23:11:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:17,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:17,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 23:11:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446057146] [2021-03-10 23:11:17,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:11:17,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:11:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:11:17,202 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) [2021-03-10 23:11:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:17,243 INFO L93 Difference]: Finished difference Result 111 states and 224 transitions. [2021-03-10 23:11:17,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:11:17,243 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 [2021-03-10 23:11:17,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:17,244 INFO L225 Difference]: With dead ends: 111 [2021-03-10 23:11:17,244 INFO L226 Difference]: Without dead ends: 96 [2021-03-10 23:11:17,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:11:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-03-10 23:11:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-03-10 23:11:17,250 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) [2021-03-10 23:11:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-03-10 23:11:17,250 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-03-10 23:11:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:17,251 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-03-10 23:11:17,251 INFO L481 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) [2021-03-10 23:11:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-03-10 23:11:17,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:11:17,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:17,252 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:17,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:17,473 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-03-10 23:11:17,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:17,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086081321] [2021-03-10 23:11:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:17,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086081321] [2021-03-10 23:11:17,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975739617] [2021-03-10 23:11:17,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:11:17,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:11:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:17,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 23:11:17,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:17,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:17,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-03-10 23:11:17,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976578504] [2021-03-10 23:11:17,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:11:17,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:11:17,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:11:17,649 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) [2021-03-10 23:11:17,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:17,673 INFO L93 Difference]: Finished difference Result 178 states and 344 transitions. [2021-03-10 23:11:17,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 23:11:17,673 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 [2021-03-10 23:11:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:17,677 INFO L225 Difference]: With dead ends: 178 [2021-03-10 23:11:17,677 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 23:11:17,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:11:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 23:11:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-03-10 23:11:17,702 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) [2021-03-10 23:11:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-03-10 23:11:17,703 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-03-10 23:11:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:17,707 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-03-10 23:11:17,708 INFO L481 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) [2021-03-10 23:11:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-03-10 23:11:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:11:17,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:17,709 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:17,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:17,924 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:17,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-03-10 23:11:17,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:17,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741302521] [2021-03-10 23:11:17,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:18,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741302521] [2021-03-10 23:11:18,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683260568] [2021-03-10 23:11:18,178 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 [2021-03-10 23:11:18,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:18,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:18,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:11:18,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:18,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:18,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:18,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:18,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:18,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:18,417 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 [2021-03-10 23:11:18,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:18,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:18,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:18,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-03-10 23:11:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:18,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:18,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 23:11:18,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923086498] [2021-03-10 23:11:18,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:11:18,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:18,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:11:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:11:18,441 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) [2021-03-10 23:11:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:18,557 INFO L93 Difference]: Finished difference Result 229 states and 467 transitions. [2021-03-10 23:11:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:11:18,558 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 [2021-03-10 23:11:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:18,561 INFO L225 Difference]: With dead ends: 229 [2021-03-10 23:11:18,561 INFO L226 Difference]: Without dead ends: 158 [2021-03-10 23:11:18,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:11:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-10 23:11:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-03-10 23:11:18,566 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) [2021-03-10 23:11:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-03-10 23:11:18,567 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-03-10 23:11:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:18,567 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-03-10 23:11:18,567 INFO L481 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) [2021-03-10 23:11:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-03-10 23:11:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:11:18,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:18,568 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:18,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:18,783 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-03-10 23:11:18,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:18,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845465557] [2021-03-10 23:11:18,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:18,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845465557] [2021-03-10 23:11:18,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450873773] [2021-03-10 23:11:18,956 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 [2021-03-10 23:11:18,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:11:18,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:18,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:11:18,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:19,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:19,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:19,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:19,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:19,188 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 [2021-03-10 23:11:19,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:19,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:19,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:19,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-03-10 23:11:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:19,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:19,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 23:11:19,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508672294] [2021-03-10 23:11:19,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:11:19,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:11:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:11:19,212 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) [2021-03-10 23:11:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:19,314 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-03-10 23:11:19,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:11:19,315 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 [2021-03-10 23:11:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:19,317 INFO L225 Difference]: With dead ends: 242 [2021-03-10 23:11:19,317 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 23:11:19,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:11:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 23:11:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-03-10 23:11:19,325 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) [2021-03-10 23:11:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-03-10 23:11:19,331 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-03-10 23:11:19,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:19,332 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-03-10 23:11:19,332 INFO L481 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) [2021-03-10 23:11:19,332 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-03-10 23:11:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:11:19,336 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:19,336 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:19,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:19,557 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:19,557 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-03-10 23:11:19,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:19,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276264644] [2021-03-10 23:11:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:19,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276264644] [2021-03-10 23:11:19,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572740451] [2021-03-10 23:11:19,723 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 [2021-03-10 23:11:19,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:11:19,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:19,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:11:19,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:19,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:19,968 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 [2021-03-10 23:11:19,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:19,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:19,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:19,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-03-10 23:11:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:19,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:19,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 23:11:19,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525348835] [2021-03-10 23:11:19,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:11:19,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:11:19,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:11:19,999 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) [2021-03-10 23:11:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:20,171 INFO L93 Difference]: Finished difference Result 370 states and 737 transitions. [2021-03-10 23:11:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:11:20,172 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 [2021-03-10 23:11:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:20,175 INFO L225 Difference]: With dead ends: 370 [2021-03-10 23:11:20,175 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 23:11:20,176 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:11:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 23:11:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-03-10 23:11:20,183 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) [2021-03-10 23:11:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-03-10 23:11:20,184 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-03-10 23:11:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:20,185 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-03-10 23:11:20,186 INFO L481 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) [2021-03-10 23:11:20,186 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-03-10 23:11:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:11:20,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:20,189 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:20,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 23:11:20,412 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:20,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:20,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-03-10 23:11:20,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:20,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907487744] [2021-03-10 23:11:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:20,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907487744] [2021-03-10 23:11:20,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010206635] [2021-03-10 23:11:20,554 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) [2021-03-10 23:11:20,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:20,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:11:20,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:20,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:20,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:20,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:20,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:20,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-03-10 23:11:20,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:20,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:20,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:20,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-03-10 23:11:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:20,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:20,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 23:11:20,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046910624] [2021-03-10 23:11:20,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:11:20,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:20,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:11:20,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:11:20,794 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) [2021-03-10 23:11:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:20,910 INFO L93 Difference]: Finished difference Result 296 states and 627 transitions. [2021-03-10 23:11:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:11:20,911 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 [2021-03-10 23:11:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:20,915 INFO L225 Difference]: With dead ends: 296 [2021-03-10 23:11:20,915 INFO L226 Difference]: Without dead ends: 244 [2021-03-10 23:11:20,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:11:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-03-10 23:11:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-03-10 23:11:20,921 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) [2021-03-10 23:11:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-03-10 23:11:20,923 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-03-10 23:11:20,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:20,923 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-03-10 23:11:20,923 INFO L481 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) [2021-03-10 23:11:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-03-10 23:11:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 23:11:20,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:20,925 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:21,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:21,144 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:21,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:21,144 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-03-10 23:11:21,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:21,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580114452] [2021-03-10 23:11:21,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:21,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580114452] [2021-03-10 23:11:21,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440326997] [2021-03-10 23:11:21,266 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 [2021-03-10 23:11:21,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:21,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 23:11:21,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:21,395 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-03-10 23:11:21,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-03-10 23:11:21,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:21,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:21,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:21,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-03-10 23:11:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:21,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:21,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 23:11:21,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995978564] [2021-03-10 23:11:21,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:11:21,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:11:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:11:21,416 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) [2021-03-10 23:11:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:21,507 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2021-03-10 23:11:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:11:21,508 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 [2021-03-10 23:11:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:21,509 INFO L225 Difference]: With dead ends: 174 [2021-03-10 23:11:21,509 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 23:11:21,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:11:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 23:11:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-03-10 23:11:21,512 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) [2021-03-10 23:11:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-03-10 23:11:21,513 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-03-10 23:11:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:21,513 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-03-10 23:11:21,514 INFO L481 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) [2021-03-10 23:11:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-03-10 23:11:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:11:21,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:21,514 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:21,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:21,728 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:21,728 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-03-10 23:11:21,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:21,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357154767] [2021-03-10 23:11:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:21,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357154767] [2021-03-10 23:11:21,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850513541] [2021-03-10 23:11:21,766 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 [2021-03-10 23:11:21,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:11:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 23:11:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:21,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:21,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:21,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 23:11:21,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351439402] [2021-03-10 23:11:21,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 23:11:21,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 23:11:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:11:21,863 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) [2021-03-10 23:11:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:21,884 INFO L93 Difference]: Finished difference Result 258 states and 510 transitions. [2021-03-10 23:11:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:11:21,884 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 [2021-03-10 23:11:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:21,886 INFO L225 Difference]: With dead ends: 258 [2021-03-10 23:11:21,886 INFO L226 Difference]: Without dead ends: 254 [2021-03-10 23:11:21,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-03-10 23:11:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-03-10 23:11:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-03-10 23:11:21,894 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) [2021-03-10 23:11:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-03-10 23:11:21,894 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-03-10 23:11:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:21,895 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-03-10 23:11:21,895 INFO L481 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) [2021-03-10 23:11:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-03-10 23:11:21,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:21,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:21,895 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:22,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:11:22,104 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:22,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:22,104 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-03-10 23:11:22,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:22,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645743952] [2021-03-10 23:11:22,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:11:22,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645743952] [2021-03-10 23:11:22,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487614942] [2021-03-10 23:11:22,265 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 [2021-03-10 23:11:22,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:22,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:22,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:11:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:22,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:22,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:22,515 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 [2021-03-10 23:11:22,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:22,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:22,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:22,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-03-10 23:11:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:22,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:22,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 23:11:22,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387273990] [2021-03-10 23:11:22,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:11:22,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:22,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:11:22,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:11:22,538 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) [2021-03-10 23:11:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:22,735 INFO L93 Difference]: Finished difference Result 412 states and 832 transitions. [2021-03-10 23:11:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 23:11:22,736 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 [2021-03-10 23:11:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:22,738 INFO L225 Difference]: With dead ends: 412 [2021-03-10 23:11:22,738 INFO L226 Difference]: Without dead ends: 275 [2021-03-10 23:11:22,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:11:22,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-03-10 23:11:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-03-10 23:11:22,743 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) [2021-03-10 23:11:22,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-03-10 23:11:22,744 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-03-10 23:11:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:22,744 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-03-10 23:11:22,744 INFO L481 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) [2021-03-10 23:11:22,745 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-03-10 23:11:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:22,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:22,745 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:22,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 23:11:22,952 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:22,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-03-10 23:11:22,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:22,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751260205] [2021-03-10 23:11:22,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:23,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751260205] [2021-03-10 23:11:23,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162632184] [2021-03-10 23:11:23,101 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 [2021-03-10 23:11:23,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:11:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:11:23,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:23,388 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 [2021-03-10 23:11:23,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:23,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:23,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:23,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-03-10 23:11:23,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:23,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:23,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-10 23:11:23,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293476397] [2021-03-10 23:11:23,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:11:23,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:23,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:11:23,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:11:23,409 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) [2021-03-10 23:11:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:23,529 INFO L93 Difference]: Finished difference Result 449 states and 948 transitions. [2021-03-10 23:11:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:11:23,529 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 [2021-03-10 23:11:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:23,532 INFO L225 Difference]: With dead ends: 449 [2021-03-10 23:11:23,532 INFO L226 Difference]: Without dead ends: 397 [2021-03-10 23:11:23,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:11:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-03-10 23:11:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-03-10 23:11:23,539 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) [2021-03-10 23:11:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-03-10 23:11:23,540 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-03-10 23:11:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:23,541 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-03-10 23:11:23,541 INFO L481 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) [2021-03-10 23:11:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-03-10 23:11:23,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:23,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:23,542 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:23,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 23:11:23,756 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:23,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-03-10 23:11:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:23,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161941034] [2021-03-10 23:11:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:23,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161941034] [2021-03-10 23:11:23,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932598593] [2021-03-10 23:11:23,943 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 [2021-03-10 23:11:23,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:11:23,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:23,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:11:23,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:24,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:24,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:24,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:24,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:24,211 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 77 treesize of output 31 [2021-03-10 23:11:24,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:24,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:24,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:24,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:87, output treesize:7 [2021-03-10 23:11:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:24,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:24,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 23:11:24,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024867274] [2021-03-10 23:11:24,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:11:24,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:24,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:11:24,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:11:24,238 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) [2021-03-10 23:11:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:24,397 INFO L93 Difference]: Finished difference Result 418 states and 869 transitions. [2021-03-10 23:11:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:11:24,398 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 [2021-03-10 23:11:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:24,399 INFO L225 Difference]: With dead ends: 418 [2021-03-10 23:11:24,399 INFO L226 Difference]: Without dead ends: 381 [2021-03-10 23:11:24,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:11:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-03-10 23:11:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-03-10 23:11:24,407 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) [2021-03-10 23:11:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-03-10 23:11:24,408 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-03-10 23:11:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:24,408 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-03-10 23:11:24,408 INFO L481 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) [2021-03-10 23:11:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-03-10 23:11:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:24,409 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:24,409 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:24,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:24,619 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-03-10 23:11:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:24,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587455729] [2021-03-10 23:11:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587455729] [2021-03-10 23:11:24,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143556917] [2021-03-10 23:11:24,786 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 [2021-03-10 23:11:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:24,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:11:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:25,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:25,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:25,025 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 [2021-03-10 23:11:25,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:25,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:25,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:25,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-03-10 23:11:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:25,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:25,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-03-10 23:11:25,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703820292] [2021-03-10 23:11:25,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:11:25,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:25,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:11:25,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:11:25,050 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) [2021-03-10 23:11:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:25,320 INFO L93 Difference]: Finished difference Result 607 states and 1212 transitions. [2021-03-10 23:11:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:25,321 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 [2021-03-10 23:11:25,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:25,323 INFO L225 Difference]: With dead ends: 607 [2021-03-10 23:11:25,323 INFO L226 Difference]: Without dead ends: 443 [2021-03-10 23:11:25,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 305.6ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:11:25,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-03-10 23:11:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-03-10 23:11:25,331 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) [2021-03-10 23:11:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-03-10 23:11:25,332 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-03-10 23:11:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:25,333 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-03-10 23:11:25,333 INFO L481 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) [2021-03-10 23:11:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-03-10 23:11:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:25,334 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:25,334 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:25,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:25,548 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:25,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-03-10 23:11:25,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:25,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624677674] [2021-03-10 23:11:25,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:25,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624677674] [2021-03-10 23:11:25,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908462716] [2021-03-10 23:11:25,709 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 [2021-03-10 23:11:25,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:25,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:11:25,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:25,944 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 [2021-03-10 23:11:25,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:25,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:25,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:25,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-03-10 23:11:25,976 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:25,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:25,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 23:11:25,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800265565] [2021-03-10 23:11:25,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:11:25,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:25,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:11:25,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:11:25,978 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) [2021-03-10 23:11:26,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:26,164 INFO L93 Difference]: Finished difference Result 566 states and 1153 transitions. [2021-03-10 23:11:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:11:26,165 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 [2021-03-10 23:11:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:26,167 INFO L225 Difference]: With dead ends: 566 [2021-03-10 23:11:26,167 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 23:11:26,167 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 218.8ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:11:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 23:11:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-03-10 23:11:26,175 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) [2021-03-10 23:11:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-03-10 23:11:26,176 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-03-10 23:11:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:26,176 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-03-10 23:11:26,176 INFO L481 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) [2021-03-10 23:11:26,176 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-03-10 23:11:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:26,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:26,177 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:26,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:26,379 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:26,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:26,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-03-10 23:11:26,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:26,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313626364] [2021-03-10 23:11:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:26,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313626364] [2021-03-10 23:11:26,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429085554] [2021-03-10 23:11:26,531 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 [2021-03-10 23:11:26,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:11:26,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:11:26,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:26,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:26,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:26,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:26,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:26,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:26,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:26,905 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 [2021-03-10 23:11:26,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:26,922 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-03-10 23:11:26,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:26,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-03-10 23:11:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:26,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:26,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-03-10 23:11:26,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444338403] [2021-03-10 23:11:26,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:11:26,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:26,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:11:26,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:11:26,938 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) [2021-03-10 23:11:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:27,377 INFO L93 Difference]: Finished difference Result 619 states and 1231 transitions. [2021-03-10 23:11:27,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:11:27,377 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 [2021-03-10 23:11:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:27,379 INFO L225 Difference]: With dead ends: 619 [2021-03-10 23:11:27,379 INFO L226 Difference]: Without dead ends: 501 [2021-03-10 23:11:27,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-10 23:11:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-03-10 23:11:27,389 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) [2021-03-10 23:11:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-03-10 23:11:27,390 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-03-10 23:11:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:27,390 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-03-10 23:11:27,390 INFO L481 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) [2021-03-10 23:11:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-03-10 23:11:27,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:27,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:27,392 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:27,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 23:11:27,608 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:27,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:27,609 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-03-10 23:11:27,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:27,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026167193] [2021-03-10 23:11:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026167193] [2021-03-10 23:11:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293389825] [2021-03-10 23:11:27,761 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 [2021-03-10 23:11:27,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:27,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 23:11:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:27,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:27,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:27,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:27,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:27,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:27,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:27,987 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 [2021-03-10 23:11:27,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:28,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:28,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:28,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-03-10 23:11:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:28,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:28,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 23:11:28,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006586935] [2021-03-10 23:11:28,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:11:28,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:11:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:11:28,033 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) [2021-03-10 23:11:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:28,224 INFO L93 Difference]: Finished difference Result 631 states and 1284 transitions. [2021-03-10 23:11:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 23:11:28,224 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 [2021-03-10 23:11:28,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:28,226 INFO L225 Difference]: With dead ends: 631 [2021-03-10 23:11:28,227 INFO L226 Difference]: Without dead ends: 579 [2021-03-10 23:11:28,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:11:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-03-10 23:11:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-03-10 23:11:28,237 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) [2021-03-10 23:11:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-03-10 23:11:28,238 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-03-10 23:11:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:28,239 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-03-10 23:11:28,239 INFO L481 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) [2021-03-10 23:11:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-03-10 23:11:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 23:11:28,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:28,240 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:28,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 23:11:28,449 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-03-10 23:11:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:28,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019455887] [2021-03-10 23:11:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:28,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:28,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019455887] [2021-03-10 23:11:28,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155737557] [2021-03-10 23:11:28,598 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 [2021-03-10 23:11:28,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:11:28,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:28,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:11:28,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:28,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:28,818 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 [2021-03-10 23:11:28,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:28,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:28,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:28,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-03-10 23:11:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:28,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:28,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 23:11:28,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554113737] [2021-03-10 23:11:28,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:11:28,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:11:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:11:28,839 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) [2021-03-10 23:11:29,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:29,061 INFO L93 Difference]: Finished difference Result 654 states and 1288 transitions. [2021-03-10 23:11:29,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:11:29,062 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 [2021-03-10 23:11:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:29,064 INFO L225 Difference]: With dead ends: 654 [2021-03-10 23:11:29,064 INFO L226 Difference]: Without dead ends: 498 [2021-03-10 23:11:29,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:11:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-03-10 23:11:29,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-03-10 23:11:29,073 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) [2021-03-10 23:11:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-03-10 23:11:29,076 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-03-10 23:11:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:29,077 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-03-10 23:11:29,077 INFO L481 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) [2021-03-10 23:11:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-03-10 23:11:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:29,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:29,078 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:29,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 23:11:29,291 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-03-10 23:11:29,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:29,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752774818] [2021-03-10 23:11:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:29,472 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:29,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752774818] [2021-03-10 23:11:29,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799930121] [2021-03-10 23:11:29,473 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) [2021-03-10 23:11:29,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:11:29,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:29,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:29,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:29,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:29,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:29,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:29,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:29,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:29,882 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 [2021-03-10 23:11:29,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:29,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:29,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:29,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:29,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:29,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-10 23:11:29,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713705398] [2021-03-10 23:11:29,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:11:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:29,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:11:29,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:29,906 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) [2021-03-10 23:11:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:30,115 INFO L93 Difference]: Finished difference Result 666 states and 1349 transitions. [2021-03-10 23:11:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:30,116 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 [2021-03-10 23:11:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:30,118 INFO L225 Difference]: With dead ends: 666 [2021-03-10 23:11:30,118 INFO L226 Difference]: Without dead ends: 629 [2021-03-10 23:11:30,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 379.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:30,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-03-10 23:11:30,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-03-10 23:11:30,128 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) [2021-03-10 23:11:30,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-03-10 23:11:30,130 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-03-10 23:11:30,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:30,130 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-03-10 23:11:30,130 INFO L481 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) [2021-03-10 23:11:30,130 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-03-10 23:11:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:30,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:30,131 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:30,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 23:11:30,347 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-03-10 23:11:30,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:30,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852145974] [2021-03-10 23:11:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:30,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852145974] [2021-03-10 23:11:30,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361478134] [2021-03-10 23:11:30,538 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 [2021-03-10 23:11:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:30,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:30,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:30,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:30,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:30,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:30,879 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 [2021-03-10 23:11:30,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:30,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:30,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:30,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:30,901 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:30,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:30,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-10 23:11:30,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042206005] [2021-03-10 23:11:30,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:11:30,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:11:30,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:11:30,903 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) [2021-03-10 23:11:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:31,140 INFO L93 Difference]: Finished difference Result 559 states and 1114 transitions. [2021-03-10 23:11:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:31,141 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 [2021-03-10 23:11:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:31,143 INFO L225 Difference]: With dead ends: 559 [2021-03-10 23:11:31,143 INFO L226 Difference]: Without dead ends: 532 [2021-03-10 23:11:31,144 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 429.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:11:31,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-03-10 23:11:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-03-10 23:11:31,152 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) [2021-03-10 23:11:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-03-10 23:11:31,153 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-03-10 23:11:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:31,154 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-03-10 23:11:31,154 INFO L481 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) [2021-03-10 23:11:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-03-10 23:11:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:31,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:31,155 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:31,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 23:11:31,371 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-03-10 23:11:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:31,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042936049] [2021-03-10 23:11:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:31,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042936049] [2021-03-10 23:11:31,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699507826] [2021-03-10 23:11:31,561 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 [2021-03-10 23:11:31,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:31,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:31,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:31,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:31,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:31,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:31,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:31,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:31,931 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 [2021-03-10 23:11:31,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:31,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:31,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:31,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:31,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:31,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-10 23:11:31,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700850845] [2021-03-10 23:11:31,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:11:31,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:31,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:11:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:31,955 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) [2021-03-10 23:11:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:32,138 INFO L93 Difference]: Finished difference Result 724 states and 1487 transitions. [2021-03-10 23:11:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:32,138 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 [2021-03-10 23:11:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:32,141 INFO L225 Difference]: With dead ends: 724 [2021-03-10 23:11:32,141 INFO L226 Difference]: Without dead ends: 666 [2021-03-10 23:11:32,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-03-10 23:11:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-03-10 23:11:32,151 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) [2021-03-10 23:11:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-03-10 23:11:32,152 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-03-10 23:11:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:32,152 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-03-10 23:11:32,152 INFO L481 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) [2021-03-10 23:11:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-03-10 23:11:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:32,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:32,153 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:32,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:32,375 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:32,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-03-10 23:11:32,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:32,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652943037] [2021-03-10 23:11:32,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:32,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652943037] [2021-03-10 23:11:32,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912353271] [2021-03-10 23:11:32,590 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 [2021-03-10 23:11:32,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:11:32,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:32,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:32,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:32,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:32,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:32,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:32,934 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 [2021-03-10 23:11:32,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:32,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:32,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:32,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:32,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:32,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-10 23:11:32,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321316321] [2021-03-10 23:11:32,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:11:32,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:11:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:32,954 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) [2021-03-10 23:11:33,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:33,187 INFO L93 Difference]: Finished difference Result 700 states and 1406 transitions. [2021-03-10 23:11:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:33,188 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 [2021-03-10 23:11:33,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:33,189 INFO L225 Difference]: With dead ends: 700 [2021-03-10 23:11:33,190 INFO L226 Difference]: Without dead ends: 523 [2021-03-10 23:11:33,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:11:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-10 23:11:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-03-10 23:11:33,199 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) [2021-03-10 23:11:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-03-10 23:11:33,200 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-03-10 23:11:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:33,200 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-03-10 23:11:33,200 INFO L481 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) [2021-03-10 23:11:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-03-10 23:11:33,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:33,201 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:33,201 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:33,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 23:11:33,415 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:33,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:33,416 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-03-10 23:11:33,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:33,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269777527] [2021-03-10 23:11:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:33,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269777527] [2021-03-10 23:11:33,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364955667] [2021-03-10 23:11:33,592 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 [2021-03-10 23:11:33,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:33,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:33,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:33,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:33,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:33,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:33,911 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 [2021-03-10 23:11:33,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:33,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:33,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:33,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:33,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:33,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-10 23:11:33,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270314768] [2021-03-10 23:11:33,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:11:33,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:33,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:11:33,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:11:33,930 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) [2021-03-10 23:11:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:34,257 INFO L93 Difference]: Finished difference Result 672 states and 1391 transitions. [2021-03-10 23:11:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:34,257 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 [2021-03-10 23:11:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:34,259 INFO L225 Difference]: With dead ends: 672 [2021-03-10 23:11:34,260 INFO L226 Difference]: Without dead ends: 617 [2021-03-10 23:11:34,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:11:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-03-10 23:11:34,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-03-10 23:11:34,268 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) [2021-03-10 23:11:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-03-10 23:11:34,269 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-03-10 23:11:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:34,269 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-03-10 23:11:34,269 INFO L481 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) [2021-03-10 23:11:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-03-10 23:11:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:34,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:34,270 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:34,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:34,483 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:34,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:34,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-03-10 23:11:34,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:34,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133718795] [2021-03-10 23:11:34,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:34,689 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133718795] [2021-03-10 23:11:34,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612788389] [2021-03-10 23:11:34,690 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 [2021-03-10 23:11:34,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:11:34,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:34,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:11:34,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:35,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:35,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:35,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:35,104 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 [2021-03-10 23:11:35,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:35,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:35,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:35,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:35,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:35,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-10 23:11:35,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508892396] [2021-03-10 23:11:35,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:11:35,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:35,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:11:35,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:11:35,124 INFO L87 Difference]: Start difference. First operand 293 states and 588 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) [2021-03-10 23:11:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:35,366 INFO L93 Difference]: Finished difference Result 651 states and 1304 transitions. [2021-03-10 23:11:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:35,367 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 [2021-03-10 23:11:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:35,368 INFO L225 Difference]: With dead ends: 651 [2021-03-10 23:11:35,369 INFO L226 Difference]: Without dead ends: 473 [2021-03-10 23:11:35,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:11:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-03-10 23:11:35,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 323. [2021-03-10 23:11:35,376 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) [2021-03-10 23:11:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-03-10 23:11:35,376 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-03-10 23:11:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:35,377 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-03-10 23:11:35,377 INFO L481 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) [2021-03-10 23:11:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-03-10 23:11:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:35,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:35,378 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:35,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 23:11:35,592 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-03-10 23:11:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:35,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358310447] [2021-03-10 23:11:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:35,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:35,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358310447] [2021-03-10 23:11:35,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227899692] [2021-03-10 23:11:35,780 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 [2021-03-10 23:11:35,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:11:35,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:35,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:36,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:36,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:36,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:36,128 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 [2021-03-10 23:11:36,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:36,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:36,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:36,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:36,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:36,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-10 23:11:36,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096370768] [2021-03-10 23:11:36,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:11:36,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:11:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:36,150 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) [2021-03-10 23:11:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:36,537 INFO L93 Difference]: Finished difference Result 636 states and 1284 transitions. [2021-03-10 23:11:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:11:36,538 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 [2021-03-10 23:11:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:36,540 INFO L225 Difference]: With dead ends: 636 [2021-03-10 23:11:36,540 INFO L226 Difference]: Without dead ends: 591 [2021-03-10 23:11:36,540 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:11:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-03-10 23:11:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-03-10 23:11:36,548 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) [2021-03-10 23:11:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-03-10 23:11:36,548 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-03-10 23:11:36,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:36,548 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-03-10 23:11:36,549 INFO L481 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) [2021-03-10 23:11:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-03-10 23:11:36,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:36,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:36,549 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:36,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:36,771 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:36,772 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-03-10 23:11:36,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:36,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952926169] [2021-03-10 23:11:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952926169] [2021-03-10 23:11:36,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747727462] [2021-03-10 23:11:36,985 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 [2021-03-10 23:11:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:37,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:37,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:37,275 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 [2021-03-10 23:11:37,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:37,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:37,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:37,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:37,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:37,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-03-10 23:11:37,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373954168] [2021-03-10 23:11:37,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:11:37,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:37,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:11:37,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:11:37,297 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) [2021-03-10 23:11:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:37,660 INFO L93 Difference]: Finished difference Result 779 states and 1533 transitions. [2021-03-10 23:11:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:11:37,660 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 [2021-03-10 23:11:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:37,662 INFO L225 Difference]: With dead ends: 779 [2021-03-10 23:11:37,662 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 23:11:37,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 520.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:11:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 23:11:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-03-10 23:11:37,669 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) [2021-03-10 23:11:37,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-03-10 23:11:37,670 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-03-10 23:11:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:37,670 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-03-10 23:11:37,670 INFO L481 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) [2021-03-10 23:11:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-03-10 23:11:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:37,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:37,671 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:37,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 23:11:37,891 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-03-10 23:11:37,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:37,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398657279] [2021-03-10 23:11:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:38,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398657279] [2021-03-10 23:11:38,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176164486] [2021-03-10 23:11:38,065 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 [2021-03-10 23:11:38,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:38,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:38,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:38,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:38,366 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 [2021-03-10 23:11:38,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:38,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:38,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:38,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:38,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:38,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-03-10 23:11:38,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517219580] [2021-03-10 23:11:38,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:11:38,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:38,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:11:38,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:11:38,390 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) [2021-03-10 23:11:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:38,723 INFO L93 Difference]: Finished difference Result 731 states and 1404 transitions. [2021-03-10 23:11:38,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:11:38,724 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 [2021-03-10 23:11:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:38,726 INFO L225 Difference]: With dead ends: 731 [2021-03-10 23:11:38,726 INFO L226 Difference]: Without dead ends: 505 [2021-03-10 23:11:38,726 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:11:38,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-03-10 23:11:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-03-10 23:11:38,732 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) [2021-03-10 23:11:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-03-10 23:11:38,733 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-03-10 23:11:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:38,733 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-03-10 23:11:38,733 INFO L481 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) [2021-03-10 23:11:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-03-10 23:11:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:38,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:38,734 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:38,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:38,955 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:38,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:38,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-03-10 23:11:38,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:38,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530240748] [2021-03-10 23:11:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:39,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530240748] [2021-03-10 23:11:39,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171638691] [2021-03-10 23:11:39,138 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 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 [2021-03-10 23:11:39,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:11:39,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:39,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-03-10 23:11:39,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:39,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:39,445 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 92 treesize of output 36 [2021-03-10 23:11:39,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:39,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:39,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:39,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:7 [2021-03-10 23:11:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:39,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:39,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-10 23:11:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340103563] [2021-03-10 23:11:39,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:11:39,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:11:39,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:11:39,467 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) [2021-03-10 23:11:39,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:39,664 INFO L93 Difference]: Finished difference Result 729 states and 1425 transitions. [2021-03-10 23:11:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:11:39,665 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 [2021-03-10 23:11:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:39,666 INFO L225 Difference]: With dead ends: 729 [2021-03-10 23:11:39,667 INFO L226 Difference]: Without dead ends: 548 [2021-03-10 23:11:39,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:11:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-10 23:11:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 293. [2021-03-10 23:11:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.8835616438356164) internal successors, (550), 292 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 550 transitions. [2021-03-10 23:11:39,690 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 550 transitions. Word has length 31 [2021-03-10 23:11:39,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:39,690 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 550 transitions. [2021-03-10 23:11:39,690 INFO L481 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) [2021-03-10 23:11:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 550 transitions. [2021-03-10 23:11:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:39,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:39,691 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:39,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 23:11:39,907 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-03-10 23:11:39,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:39,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786021579] [2021-03-10 23:11:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:40,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786021579] [2021-03-10 23:11:40,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295694561] [2021-03-10 23:11:40,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:11:40,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:40,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:40,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:40,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:40,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:40,374 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 [2021-03-10 23:11:40,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:40,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:40,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:40,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:40,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:40,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-03-10 23:11:40,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501720154] [2021-03-10 23:11:40,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:11:40,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:40,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:11:40,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:11:40,398 INFO L87 Difference]: Start difference. First operand 293 states and 550 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) [2021-03-10 23:11:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:40,827 INFO L93 Difference]: Finished difference Result 779 states and 1495 transitions. [2021-03-10 23:11:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:11:40,827 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 [2021-03-10 23:11:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:40,829 INFO L225 Difference]: With dead ends: 779 [2021-03-10 23:11:40,829 INFO L226 Difference]: Without dead ends: 568 [2021-03-10 23:11:40,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:11:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-03-10 23:11:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 360. [2021-03-10 23:11:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.8579387186629526) internal successors, (667), 359 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 667 transitions. [2021-03-10 23:11:40,836 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 667 transitions. Word has length 31 [2021-03-10 23:11:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:40,837 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 667 transitions. [2021-03-10 23:11:40,837 INFO L481 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) [2021-03-10 23:11:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 667 transitions. [2021-03-10 23:11:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:40,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:40,838 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:41,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:41,043 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:41,044 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-03-10 23:11:41,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:41,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750896590] [2021-03-10 23:11:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750896590] [2021-03-10 23:11:41,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742836523] [2021-03-10 23:11:41,219 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 [2021-03-10 23:11:41,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:11:41,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:41,244 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:11:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:41,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:41,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:41,494 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 92 treesize of output 36 [2021-03-10 23:11:41,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:41,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:41,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:41,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:7 [2021-03-10 23:11:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:41,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:41,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-03-10 23:11:41,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199236006] [2021-03-10 23:11:41,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:11:41,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:41,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:11:41,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:11:41,514 INFO L87 Difference]: Start difference. First operand 360 states and 667 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) [2021-03-10 23:11:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:41,663 INFO L93 Difference]: Finished difference Result 716 states and 1390 transitions. [2021-03-10 23:11:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:41,663 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 [2021-03-10 23:11:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:41,665 INFO L225 Difference]: With dead ends: 716 [2021-03-10 23:11:41,665 INFO L226 Difference]: Without dead ends: 671 [2021-03-10 23:11:41,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:11:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-03-10 23:11:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 351. [2021-03-10 23:11:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.8542857142857143) internal successors, (649), 350 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:41,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 649 transitions. [2021-03-10 23:11:41,672 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 649 transitions. Word has length 31 [2021-03-10 23:11:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:41,673 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 649 transitions. [2021-03-10 23:11:41,673 INFO L481 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) [2021-03-10 23:11:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 649 transitions. [2021-03-10 23:11:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:41,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:41,674 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:41,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 23:11:41,891 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:41,892 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-03-10 23:11:41,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:41,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069469351] [2021-03-10 23:11:41,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:42,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069469351] [2021-03-10 23:11:42,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213069473] [2021-03-10 23:11:42,074 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 [2021-03-10 23:11:42,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:11:42,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:42,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:42,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:42,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:42,357 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 [2021-03-10 23:11:42,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:42,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:42,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:42,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-03-10 23:11:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:42,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:42,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-03-10 23:11:42,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067076487] [2021-03-10 23:11:42,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:11:42,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:11:42,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:11:42,379 INFO L87 Difference]: Start difference. First operand 351 states and 649 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) [2021-03-10 23:11:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:42,668 INFO L93 Difference]: Finished difference Result 699 states and 1370 transitions. [2021-03-10 23:11:42,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:42,668 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 [2021-03-10 23:11:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:42,671 INFO L225 Difference]: With dead ends: 699 [2021-03-10 23:11:42,671 INFO L226 Difference]: Without dead ends: 654 [2021-03-10 23:11:42,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:11:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-03-10 23:11:42,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 372. [2021-03-10 23:11:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 1.8652291105121295) internal successors, (692), 371 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:42,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 692 transitions. [2021-03-10 23:11:42,679 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 692 transitions. Word has length 31 [2021-03-10 23:11:42,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:42,679 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 692 transitions. [2021-03-10 23:11:42,679 INFO L481 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) [2021-03-10 23:11:42,679 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 692 transitions. [2021-03-10 23:11:42,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-10 23:11:42,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:42,680 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:42,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 23:11:42,894 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:42,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:42,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-03-10 23:11:42,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:42,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096665430] [2021-03-10 23:11:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:43,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096665430] [2021-03-10 23:11:43,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337054544] [2021-03-10 23:11:43,095 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 [2021-03-10 23:11:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:43,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:11:43,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:43,307 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-03-10 23:11:43,308 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 [2021-03-10 23:11:43,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:43,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:43,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:43,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-03-10 23:11:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:43,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:43,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-03-10 23:11:43,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855427955] [2021-03-10 23:11:43,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:11:43,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:43,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:11:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:11:43,325 INFO L87 Difference]: Start difference. First operand 372 states and 692 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) [2021-03-10 23:11:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:43,540 INFO L93 Difference]: Finished difference Result 563 states and 1082 transitions. [2021-03-10 23:11:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:11:43,540 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 [2021-03-10 23:11:43,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:43,542 INFO L225 Difference]: With dead ends: 563 [2021-03-10 23:11:43,542 INFO L226 Difference]: Without dead ends: 548 [2021-03-10 23:11:43,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:11:43,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-03-10 23:11:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 379. [2021-03-10 23:11:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.8703703703703705) internal successors, (707), 378 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 707 transitions. [2021-03-10 23:11:43,549 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 707 transitions. Word has length 31 [2021-03-10 23:11:43,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:43,549 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 707 transitions. [2021-03-10 23:11:43,549 INFO L481 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) [2021-03-10 23:11:43,549 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 707 transitions. [2021-03-10 23:11:43,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:11:43,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:43,550 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:43,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 23:11:43,759 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-03-10 23:11:43,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:43,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397776410] [2021-03-10 23:11:43,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:11:43,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397776410] [2021-03-10 23:11:43,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127232967] [2021-03-10 23:11:43,796 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 [2021-03-10 23:11:43,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:11:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:11:43,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:43,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-03-10 23:11:43,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020597640] [2021-03-10 23:11:43,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 23:11:43,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:43,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 23:11:43,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:11:43,887 INFO L87 Difference]: Start difference. First operand 379 states and 707 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) [2021-03-10 23:11:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:43,916 INFO L93 Difference]: Finished difference Result 589 states and 1126 transitions. [2021-03-10 23:11:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:11:43,917 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 [2021-03-10 23:11:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:43,918 INFO L225 Difference]: With dead ends: 589 [2021-03-10 23:11:43,919 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 23:11:43,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-03-10 23:11:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 23:11:43,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 496. [2021-03-10 23:11:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.97979797979798) internal successors, (980), 495 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 980 transitions. [2021-03-10 23:11:43,928 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 980 transitions. Word has length 32 [2021-03-10 23:11:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:43,928 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 980 transitions. [2021-03-10 23:11:43,928 INFO L481 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) [2021-03-10 23:11:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 980 transitions. [2021-03-10 23:11:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:11:43,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:43,929 INFO L519 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:44,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 23:11:44,143 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-03-10 23:11:44,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:44,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386355467] [2021-03-10 23:11:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:44,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386355467] [2021-03-10 23:11:44,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197150511] [2021-03-10 23:11:44,184 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) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:44,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:11:44,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:44,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 23:11:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:44,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:44,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 23:11:44,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056988002] [2021-03-10 23:11:44,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:11:44,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:11:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:11:44,267 INFO L87 Difference]: Start difference. First operand 496 states and 980 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) [2021-03-10 23:11:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:44,297 INFO L93 Difference]: Finished difference Result 769 states and 1530 transitions. [2021-03-10 23:11:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:11:44,298 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 [2021-03-10 23:11:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:44,300 INFO L225 Difference]: With dead ends: 769 [2021-03-10 23:11:44,300 INFO L226 Difference]: Without dead ends: 763 [2021-03-10 23:11:44,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:11:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-03-10 23:11:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 541. [2021-03-10 23:11:44,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.0055555555555555) internal successors, (1083), 540 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1083 transitions. [2021-03-10 23:11:44,310 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1083 transitions. Word has length 32 [2021-03-10 23:11:44,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:44,310 INFO L480 AbstractCegarLoop]: Abstraction has 541 states and 1083 transitions. [2021-03-10 23:11:44,310 INFO L481 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) [2021-03-10 23:11:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1083 transitions. [2021-03-10 23:11:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:44,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:44,311 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:44,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 23:11:44,527 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:44,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-03-10 23:11:44,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:44,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878161793] [2021-03-10 23:11:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:44,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878161793] [2021-03-10 23:11:44,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517249673] [2021-03-10 23:11:44,722 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 [2021-03-10 23:11:44,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:44,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:44,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:45,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:45,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:45,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:45,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:45,208 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 [2021-03-10 23:11:45,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:45,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:45,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:45,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:45,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:45,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-03-10 23:11:45,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563767409] [2021-03-10 23:11:45,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:11:45,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:45,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:11:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:11:45,230 INFO L87 Difference]: Start difference. First operand 541 states and 1083 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) [2021-03-10 23:11:45,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:45,690 INFO L93 Difference]: Finished difference Result 1447 states and 2998 transitions. [2021-03-10 23:11:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:11:45,691 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 [2021-03-10 23:11:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:45,695 INFO L225 Difference]: With dead ends: 1447 [2021-03-10 23:11:45,695 INFO L226 Difference]: Without dead ends: 1355 [2021-03-10 23:11:45,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 499.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:11:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-03-10 23:11:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 583. [2021-03-10 23:11:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.9948453608247423) internal successors, (1161), 582 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:45,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1161 transitions. [2021-03-10 23:11:45,709 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1161 transitions. Word has length 35 [2021-03-10 23:11:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:45,710 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1161 transitions. [2021-03-10 23:11:45,710 INFO L481 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) [2021-03-10 23:11:45,710 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1161 transitions. [2021-03-10 23:11:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:45,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:45,711 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:45,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 23:11:45,927 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:45,928 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-03-10 23:11:45,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:45,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795875929] [2021-03-10 23:11:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:46,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795875929] [2021-03-10 23:11:46,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088334760] [2021-03-10 23:11:46,170 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 [2021-03-10 23:11:46,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:11:46,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:46,208 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:46,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:46,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:46,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:46,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:46,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:46,704 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 [2021-03-10 23:11:46,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:46,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:46,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:46,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:46,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:46,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 23:11:46,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628416650] [2021-03-10 23:11:46,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:11:46,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:46,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:11:46,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:11:46,726 INFO L87 Difference]: Start difference. First operand 583 states and 1161 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) [2021-03-10 23:11:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:47,147 INFO L93 Difference]: Finished difference Result 1451 states and 3024 transitions. [2021-03-10 23:11:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:11:47,148 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 [2021-03-10 23:11:47,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:47,153 INFO L225 Difference]: With dead ends: 1451 [2021-03-10 23:11:47,153 INFO L226 Difference]: Without dead ends: 1356 [2021-03-10 23:11:47,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:11:47,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-03-10 23:11:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 499. [2021-03-10 23:11:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0180722891566263) internal successors, (1005), 498 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:47,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1005 transitions. [2021-03-10 23:11:47,166 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1005 transitions. Word has length 35 [2021-03-10 23:11:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:47,166 INFO L480 AbstractCegarLoop]: Abstraction has 499 states and 1005 transitions. [2021-03-10 23:11:47,166 INFO L481 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) [2021-03-10 23:11:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1005 transitions. [2021-03-10 23:11:47,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:47,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:47,167 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:47,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 23:11:47,383 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-03-10 23:11:47,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:47,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815328056] [2021-03-10 23:11:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:47,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815328056] [2021-03-10 23:11:47,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231920748] [2021-03-10 23:11:47,593 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 [2021-03-10 23:11:47,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:11:47,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:47,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:47,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:48,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:48,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:48,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:48,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:48,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:48,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:48,064 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 [2021-03-10 23:11:48,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:48,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:48,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:48,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:48,088 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:48,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:48,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-03-10 23:11:48,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13278329] [2021-03-10 23:11:48,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:11:48,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:48,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:11:48,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:11:48,090 INFO L87 Difference]: Start difference. First operand 499 states and 1005 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) [2021-03-10 23:11:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:48,463 INFO L93 Difference]: Finished difference Result 1224 states and 2546 transitions. [2021-03-10 23:11:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:48,464 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 [2021-03-10 23:11:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:48,468 INFO L225 Difference]: With dead ends: 1224 [2021-03-10 23:11:48,468 INFO L226 Difference]: Without dead ends: 1034 [2021-03-10 23:11:48,468 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 496.6ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:11:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-03-10 23:11:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 529. [2021-03-10 23:11:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.003787878787879) internal successors, (1058), 528 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1058 transitions. [2021-03-10 23:11:48,480 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1058 transitions. Word has length 35 [2021-03-10 23:11:48,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:48,480 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1058 transitions. [2021-03-10 23:11:48,480 INFO L481 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) [2021-03-10 23:11:48,480 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1058 transitions. [2021-03-10 23:11:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:48,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:48,481 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:48,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:48,702 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:48,703 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-03-10 23:11:48,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:48,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901852460] [2021-03-10 23:11:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:48,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901852460] [2021-03-10 23:11:48,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185187292] [2021-03-10 23:11:48,959 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) [2021-03-10 23:11:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:48,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:48,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:49,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:49,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:49,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:49,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:49,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:49,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:49,468 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 [2021-03-10 23:11:49,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:49,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:49,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:49,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:49,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:49,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 23:11:49,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233608702] [2021-03-10 23:11:49,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:11:49,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:49,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:11:49,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:11:49,491 INFO L87 Difference]: Start difference. First operand 529 states and 1058 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) [2021-03-10 23:11:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:49,784 INFO L93 Difference]: Finished difference Result 1214 states and 2502 transitions. [2021-03-10 23:11:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:11:49,785 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 [2021-03-10 23:11:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:49,788 INFO L225 Difference]: With dead ends: 1214 [2021-03-10 23:11:49,789 INFO L226 Difference]: Without dead ends: 1160 [2021-03-10 23:11:49,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:11:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-03-10 23:11:49,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 523. [2021-03-10 23:11:49,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.003831417624521) internal successors, (1046), 522 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1046 transitions. [2021-03-10 23:11:49,801 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1046 transitions. Word has length 35 [2021-03-10 23:11:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:49,803 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 1046 transitions. [2021-03-10 23:11:49,803 INFO L481 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) [2021-03-10 23:11:49,803 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1046 transitions. [2021-03-10 23:11:49,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:49,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:49,804 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:50,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:50,019 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-03-10 23:11:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:50,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243779574] [2021-03-10 23:11:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:50,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243779574] [2021-03-10 23:11:50,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754088766] [2021-03-10 23:11:50,259 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 [2021-03-10 23:11:50,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:11:50,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:50,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:50,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:50,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:50,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:50,757 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 [2021-03-10 23:11:50,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:50,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:50,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:50,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:50,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:50,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-03-10 23:11:50,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733930374] [2021-03-10 23:11:50,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:11:50,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:50,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:11:50,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:11:50,777 INFO L87 Difference]: Start difference. First operand 523 states and 1046 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) [2021-03-10 23:11:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:51,254 INFO L93 Difference]: Finished difference Result 890 states and 1807 transitions. [2021-03-10 23:11:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:11:51,255 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 [2021-03-10 23:11:51,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:51,257 INFO L225 Difference]: With dead ends: 890 [2021-03-10 23:11:51,258 INFO L226 Difference]: Without dead ends: 869 [2021-03-10 23:11:51,258 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 541.6ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:11:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-03-10 23:11:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 529. [2021-03-10 23:11:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 2.003787878787879) internal successors, (1058), 528 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1058 transitions. [2021-03-10 23:11:51,268 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1058 transitions. Word has length 35 [2021-03-10 23:11:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:51,268 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1058 transitions. [2021-03-10 23:11:51,268 INFO L481 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) [2021-03-10 23:11:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1058 transitions. [2021-03-10 23:11:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:51,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:51,269 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:51,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:51,483 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-03-10 23:11:51,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:51,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644579708] [2021-03-10 23:11:51,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644579708] [2021-03-10 23:11:51,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240051752] [2021-03-10 23:11:51,721 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 [2021-03-10 23:11:51,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:11:51,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:51,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-03-10 23:11:51,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:52,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:52,281 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 [2021-03-10 23:11:52,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:52,295 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:11:52,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:52,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-03-10 23:11:52,307 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:52,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:52,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-03-10 23:11:52,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392114526] [2021-03-10 23:11:52,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:11:52,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:52,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:11:52,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:11:52,308 INFO L87 Difference]: Start difference. First operand 529 states and 1058 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) [2021-03-10 23:11:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:53,401 INFO L93 Difference]: Finished difference Result 1230 states and 2422 transitions. [2021-03-10 23:11:53,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:11:53,402 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 [2021-03-10 23:11:53,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:53,405 INFO L225 Difference]: With dead ends: 1230 [2021-03-10 23:11:53,405 INFO L226 Difference]: Without dead ends: 986 [2021-03-10 23:11:53,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1131.4ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:11:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-03-10 23:11:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 605. [2021-03-10 23:11:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 1.990066225165563) internal successors, (1202), 604 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:53,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1202 transitions. [2021-03-10 23:11:53,417 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1202 transitions. Word has length 35 [2021-03-10 23:11:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:53,417 INFO L480 AbstractCegarLoop]: Abstraction has 605 states and 1202 transitions. [2021-03-10 23:11:53,417 INFO L481 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) [2021-03-10 23:11:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1202 transitions. [2021-03-10 23:11:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:53,418 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:53,419 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:53,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 23:11:53,623 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-03-10 23:11:53,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:53,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062472781] [2021-03-10 23:11:53,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:53,872 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:53,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062472781] [2021-03-10 23:11:53,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927269175] [2021-03-10 23:11:53,872 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 [2021-03-10 23:11:53,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:11:53,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:53,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:53,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:54,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:54,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:54,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:54,334 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 [2021-03-10 23:11:54,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:54,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:54,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:54,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:54,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:54,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-03-10 23:11:54,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367369184] [2021-03-10 23:11:54,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:11:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:54,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:11:54,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:11:54,355 INFO L87 Difference]: Start difference. First operand 605 states and 1202 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) [2021-03-10 23:11:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:54,825 INFO L93 Difference]: Finished difference Result 1689 states and 3487 transitions. [2021-03-10 23:11:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:11:54,826 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 [2021-03-10 23:11:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:54,829 INFO L225 Difference]: With dead ends: 1689 [2021-03-10 23:11:54,830 INFO L226 Difference]: Without dead ends: 1560 [2021-03-10 23:11:54,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:11:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-03-10 23:11:54,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 689. [2021-03-10 23:11:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.9752906976744187) internal successors, (1359), 688 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1359 transitions. [2021-03-10 23:11:54,846 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1359 transitions. Word has length 35 [2021-03-10 23:11:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:54,846 INFO L480 AbstractCegarLoop]: Abstraction has 689 states and 1359 transitions. [2021-03-10 23:11:54,846 INFO L481 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) [2021-03-10 23:11:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1359 transitions. [2021-03-10 23:11:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:54,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:54,847 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:55,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:55,051 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:55,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-03-10 23:11:55,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:55,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244041925] [2021-03-10 23:11:55,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:55,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244041925] [2021-03-10 23:11:55,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856361985] [2021-03-10 23:11:55,298 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 [2021-03-10 23:11:55,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:11:55,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:55,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-03-10 23:11:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:55,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:55,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:55,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:55,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:55,882 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 [2021-03-10 23:11:55,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:55,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:55,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:55,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-03-10 23:11:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:55,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:55,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-03-10 23:11:55,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403433244] [2021-03-10 23:11:55,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:11:55,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:55,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:11:55,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:11:55,914 INFO L87 Difference]: Start difference. First operand 689 states and 1359 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) [2021-03-10 23:11:57,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:57,175 INFO L93 Difference]: Finished difference Result 1357 states and 2742 transitions. [2021-03-10 23:11:57,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:11:57,176 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 [2021-03-10 23:11:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:57,178 INFO L225 Difference]: With dead ends: 1357 [2021-03-10 23:11:57,178 INFO L226 Difference]: Without dead ends: 1135 [2021-03-10 23:11:57,179 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1238.8ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:11:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-03-10 23:11:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 725. [2021-03-10 23:11:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.9765193370165746) internal successors, (1431), 724 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1431 transitions. [2021-03-10 23:11:57,198 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1431 transitions. Word has length 35 [2021-03-10 23:11:57,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:57,198 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 1431 transitions. [2021-03-10 23:11:57,198 INFO L481 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) [2021-03-10 23:11:57,198 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1431 transitions. [2021-03-10 23:11:57,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:57,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:57,199 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:57,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:11:57,407 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-03-10 23:11:57,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:57,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448213075] [2021-03-10 23:11:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:57,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448213075] [2021-03-10 23:11:57,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231766214] [2021-03-10 23:11:57,660 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 [2021-03-10 23:11:57,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:11:57,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:11:57,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:57,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:58,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:58,163 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 [2021-03-10 23:11:58,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:58,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:58,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:58,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:58,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:58,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-03-10 23:11:58,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351978668] [2021-03-10 23:11:58,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:11:58,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:58,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:11:58,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:11:58,182 INFO L87 Difference]: Start difference. First operand 725 states and 1431 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) [2021-03-10 23:11:58,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:11:58,704 INFO L93 Difference]: Finished difference Result 1274 states and 2549 transitions. [2021-03-10 23:11:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:11:58,704 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 [2021-03-10 23:11:58,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:11:58,707 INFO L225 Difference]: With dead ends: 1274 [2021-03-10 23:11:58,707 INFO L226 Difference]: Without dead ends: 1253 [2021-03-10 23:11:58,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:11:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1253 states. [2021-03-10 23:11:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1253 to 725. [2021-03-10 23:11:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.9765193370165746) internal successors, (1431), 724 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:11:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 1431 transitions. [2021-03-10 23:11:58,720 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 1431 transitions. Word has length 35 [2021-03-10 23:11:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:11:58,721 INFO L480 AbstractCegarLoop]: Abstraction has 725 states and 1431 transitions. [2021-03-10 23:11:58,721 INFO L481 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) [2021-03-10 23:11:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 1431 transitions. [2021-03-10 23:11:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:11:58,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:11:58,722 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:11:58,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 23:11:58,943 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:11:58,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:11:58,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-03-10 23:11:58,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:11:58,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114174883] [2021-03-10 23:11:58,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:11:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:59,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114174883] [2021-03-10 23:11:59,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614667485] [2021-03-10 23:11:59,228 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 [2021-03-10 23:11:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:11:59,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:11:59,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:11:59,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:11:59,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:11:59,577 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 [2021-03-10 23:11:59,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:11:59,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:11:59,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:11:59,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:11:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:11:59,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:11:59,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-03-10 23:11:59,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77271731] [2021-03-10 23:11:59,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:11:59,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:11:59,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:11:59,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:11:59,599 INFO L87 Difference]: Start difference. First operand 725 states and 1431 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) [2021-03-10 23:12:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:00,256 INFO L93 Difference]: Finished difference Result 1554 states and 3091 transitions. [2021-03-10 23:12:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:12:00,257 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 [2021-03-10 23:12:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:00,259 INFO L225 Difference]: With dead ends: 1554 [2021-03-10 23:12:00,259 INFO L226 Difference]: Without dead ends: 1324 [2021-03-10 23:12:00,259 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 709.9ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:00,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-03-10 23:12:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 883. [2021-03-10 23:12:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 1.9648526077097506) internal successors, (1733), 882 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1733 transitions. [2021-03-10 23:12:00,272 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1733 transitions. Word has length 35 [2021-03-10 23:12:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:00,272 INFO L480 AbstractCegarLoop]: Abstraction has 883 states and 1733 transitions. [2021-03-10 23:12:00,272 INFO L481 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) [2021-03-10 23:12:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1733 transitions. [2021-03-10 23:12:00,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:12:00,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:00,274 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:00,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 23:12:00,477 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:00,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-03-10 23:12:00,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:00,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812100314] [2021-03-10 23:12:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 23:12:00,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812100314] [2021-03-10 23:12:00,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750189312] [2021-03-10 23:12:00,656 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 [2021-03-10 23:12:00,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:12:00,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:00,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:12:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:01,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:01,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:01,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:01,061 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 [2021-03-10 23:12:01,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:01,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:01,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:01,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:12:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:01,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:01,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-03-10 23:12:01,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574434791] [2021-03-10 23:12:01,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:12:01,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:01,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:12:01,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:12:01,082 INFO L87 Difference]: Start difference. First operand 883 states and 1733 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) [2021-03-10 23:12:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:01,868 INFO L93 Difference]: Finished difference Result 1776 states and 3573 transitions. [2021-03-10 23:12:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:12:01,869 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 [2021-03-10 23:12:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:01,873 INFO L225 Difference]: With dead ends: 1776 [2021-03-10 23:12:01,873 INFO L226 Difference]: Without dead ends: 1578 [2021-03-10 23:12:01,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 699.3ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:12:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-03-10 23:12:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 916. [2021-03-10 23:12:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 1.9693989071038251) internal successors, (1802), 915 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1802 transitions. [2021-03-10 23:12:01,894 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1802 transitions. Word has length 35 [2021-03-10 23:12:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:01,894 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 1802 transitions. [2021-03-10 23:12:01,894 INFO L481 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) [2021-03-10 23:12:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1802 transitions. [2021-03-10 23:12:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:12:01,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:01,896 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:02,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 23:12:02,097 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-03-10 23:12:02,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:02,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445924269] [2021-03-10 23:12:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:02,344 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:02,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445924269] [2021-03-10 23:12:02,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068409702] [2021-03-10 23:12:02,344 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) [2021-03-10 23:12:02,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:12:02,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:02,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 51 conjunts are in the unsatisfiable core [2021-03-10 23:12:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:02,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:02,770 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 [2021-03-10 23:12:02,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:02,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:02,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:02,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:12:02,793 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:02,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:02,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 20 [2021-03-10 23:12:02,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946122873] [2021-03-10 23:12:02,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:12:02,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:02,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:12:02,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:12:02,796 INFO L87 Difference]: Start difference. First operand 916 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-03-10 23:12:03,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:03,194 INFO L93 Difference]: Finished difference Result 1857 states and 3665 transitions. [2021-03-10 23:12:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:12:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 [2021-03-10 23:12:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:03,199 INFO L225 Difference]: With dead ends: 1857 [2021-03-10 23:12:03,199 INFO L226 Difference]: Without dead ends: 1654 [2021-03-10 23:12:03,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:12:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-03-10 23:12:03,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1024. [2021-03-10 23:12:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 1.9736070381231672) internal successors, (2019), 1023 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2019 transitions. [2021-03-10 23:12:03,221 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2019 transitions. Word has length 35 [2021-03-10 23:12:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:03,221 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 2019 transitions. [2021-03-10 23:12:03,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-03-10 23:12:03,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2019 transitions. [2021-03-10 23:12:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:12:03,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:03,224 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:03,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:03,439 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:03,440 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-03-10 23:12:03,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:03,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884513235] [2021-03-10 23:12:03,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:03,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884513235] [2021-03-10 23:12:03,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568670706] [2021-03-10 23:12:03,707 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 [2021-03-10 23:12:03,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:12:03,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:03,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:12:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:04,139 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 [2021-03-10 23:12:04,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:04,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:04,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:04,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:12:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:04,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:04,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-10 23:12:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046830806] [2021-03-10 23:12:04,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:12:04,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:12:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:12:04,160 INFO L87 Difference]: Start difference. First operand 1024 states and 2019 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) [2021-03-10 23:12:04,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:04,657 INFO L93 Difference]: Finished difference Result 1930 states and 3966 transitions. [2021-03-10 23:12:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:12:04,657 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 [2021-03-10 23:12:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:04,661 INFO L225 Difference]: With dead ends: 1930 [2021-03-10 23:12:04,661 INFO L226 Difference]: Without dead ends: 1811 [2021-03-10 23:12:04,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:12:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-03-10 23:12:04,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1039. [2021-03-10 23:12:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 1.97495183044316) internal successors, (2050), 1038 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 2050 transitions. [2021-03-10 23:12:04,683 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 2050 transitions. Word has length 35 [2021-03-10 23:12:04,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:04,683 INFO L480 AbstractCegarLoop]: Abstraction has 1039 states and 2050 transitions. [2021-03-10 23:12:04,683 INFO L481 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) [2021-03-10 23:12:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 2050 transitions. [2021-03-10 23:12:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:12:04,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:04,685 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:04,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:04,886 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:04,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-03-10 23:12:04,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:04,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587549885] [2021-03-10 23:12:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:05,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587549885] [2021-03-10 23:12:05,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400318154] [2021-03-10 23:12:05,137 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 [2021-03-10 23:12:05,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:12:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:05,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-03-10 23:12:05,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:05,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:05,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:05,794 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 103 treesize of output 43 [2021-03-10 23:12:05,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:05,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:05,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:05,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:118, output treesize:7 [2021-03-10 23:12:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:05,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:05,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-03-10 23:12:05,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182564608] [2021-03-10 23:12:05,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:12:05,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:05,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:12:05,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:12:05,817 INFO L87 Difference]: Start difference. First operand 1039 states and 2050 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-03-10 23:12:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:07,168 INFO L93 Difference]: Finished difference Result 1874 states and 3755 transitions. [2021-03-10 23:12:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:12:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 35 [2021-03-10 23:12:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:07,172 INFO L225 Difference]: With dead ends: 1874 [2021-03-10 23:12:07,172 INFO L226 Difference]: Without dead ends: 1685 [2021-03-10 23:12:07,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1270.0ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:12:07,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-03-10 23:12:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1110. [2021-03-10 23:12:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 1.9810640216411182) internal successors, (2197), 1109 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:07,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 2197 transitions. [2021-03-10 23:12:07,195 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 2197 transitions. Word has length 35 [2021-03-10 23:12:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:07,195 INFO L480 AbstractCegarLoop]: Abstraction has 1110 states and 2197 transitions. [2021-03-10 23:12:07,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-03-10 23:12:07,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 2197 transitions. [2021-03-10 23:12:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:12:07,197 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:07,197 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:07,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 23:12:07,415 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:07,416 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-03-10 23:12:07,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:07,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729265467] [2021-03-10 23:12:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:07,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729265467] [2021-03-10 23:12:07,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322204709] [2021-03-10 23:12:07,637 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 [2021-03-10 23:12:07,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:12:07,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:07,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:12:07,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:08,022 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 [2021-03-10 23:12:08,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:08,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:08,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:08,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:12:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:08,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:08,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-03-10 23:12:08,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747869279] [2021-03-10 23:12:08,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:12:08,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:08,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:12:08,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:12:08,044 INFO L87 Difference]: Start difference. First operand 1110 states and 2197 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) [2021-03-10 23:12:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:08,386 INFO L93 Difference]: Finished difference Result 2082 states and 4220 transitions. [2021-03-10 23:12:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:12:08,388 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 [2021-03-10 23:12:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:08,392 INFO L225 Difference]: With dead ends: 2082 [2021-03-10 23:12:08,392 INFO L226 Difference]: Without dead ends: 2022 [2021-03-10 23:12:08,392 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:12:08,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-03-10 23:12:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1077. [2021-03-10 23:12:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.9767657992565055) internal successors, (2127), 1076 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2127 transitions. [2021-03-10 23:12:08,419 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2127 transitions. Word has length 35 [2021-03-10 23:12:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:08,419 INFO L480 AbstractCegarLoop]: Abstraction has 1077 states and 2127 transitions. [2021-03-10 23:12:08,419 INFO L481 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) [2021-03-10 23:12:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2127 transitions. [2021-03-10 23:12:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:12:08,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:08,421 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:08,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:08,642 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:08,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:08,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-03-10 23:12:08,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:08,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543451797] [2021-03-10 23:12:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:08,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543451797] [2021-03-10 23:12:08,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278710438] [2021-03-10 23:12:08,897 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) [2021-03-10 23:12:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:08,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:12:08,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:09,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:09,326 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 [2021-03-10 23:12:09,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:09,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:09,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:09,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:12:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:09,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:09,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 23:12:09,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630399909] [2021-03-10 23:12:09,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:12:09,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:12:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:12:09,353 INFO L87 Difference]: Start difference. First operand 1077 states and 2127 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) [2021-03-10 23:12:09,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:09,825 INFO L93 Difference]: Finished difference Result 1881 states and 3805 transitions. [2021-03-10 23:12:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:12:09,825 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 [2021-03-10 23:12:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:09,830 INFO L225 Difference]: With dead ends: 1881 [2021-03-10 23:12:09,830 INFO L226 Difference]: Without dead ends: 1825 [2021-03-10 23:12:09,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:12:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-03-10 23:12:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1077. [2021-03-10 23:12:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 1.9767657992565055) internal successors, (2127), 1076 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2127 transitions. [2021-03-10 23:12:09,852 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2127 transitions. Word has length 35 [2021-03-10 23:12:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:09,852 INFO L480 AbstractCegarLoop]: Abstraction has 1077 states and 2127 transitions. [2021-03-10 23:12:09,852 INFO L481 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) [2021-03-10 23:12:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2127 transitions. [2021-03-10 23:12:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-03-10 23:12:09,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:09,854 INFO L519 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:10,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 23:12:10,067 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:10,068 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-03-10 23:12:10,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:10,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790900484] [2021-03-10 23:12:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:10,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790900484] [2021-03-10 23:12:10,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93120999] [2021-03-10 23:12:10,340 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) [2021-03-10 23:12:10,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:12:10,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:10,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:12:10,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:10,672 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-03-10 23:12:10,673 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 [2021-03-10 23:12:10,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:10,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:10,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:10,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-03-10 23:12:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:10,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:10,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-03-10 23:12:10,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631200477] [2021-03-10 23:12:10,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:12:10,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:10,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:12:10,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:12:10,690 INFO L87 Difference]: Start difference. First operand 1077 states and 2127 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) [2021-03-10 23:12:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:11,076 INFO L93 Difference]: Finished difference Result 1518 states and 3021 transitions. [2021-03-10 23:12:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 23:12:11,078 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 [2021-03-10 23:12:11,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:11,081 INFO L225 Difference]: With dead ends: 1518 [2021-03-10 23:12:11,082 INFO L226 Difference]: Without dead ends: 1503 [2021-03-10 23:12:11,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 445.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:12:11,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2021-03-10 23:12:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 1084. [2021-03-10 23:12:11,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 1.9778393351800554) internal successors, (2142), 1083 states have internal predecessors, (2142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2142 transitions. [2021-03-10 23:12:11,101 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2142 transitions. Word has length 35 [2021-03-10 23:12:11,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:11,102 INFO L480 AbstractCegarLoop]: Abstraction has 1084 states and 2142 transitions. [2021-03-10 23:12:11,102 INFO L481 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) [2021-03-10 23:12:11,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2142 transitions. [2021-03-10 23:12:11,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-03-10 23:12:11,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:11,104 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:11,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 23:12:11,315 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:11,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:11,316 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-03-10 23:12:11,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:11,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359884823] [2021-03-10 23:12:11,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:11,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359884823] [2021-03-10 23:12:11,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298617752] [2021-03-10 23:12:11,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:12:11,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:12:11,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 23:12:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:11,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:11,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 23:12:11,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329636955] [2021-03-10 23:12:11,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:12:11,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:12:11,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:12:11,460 INFO L87 Difference]: Start difference. First operand 1084 states and 2142 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) [2021-03-10 23:12:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:11,516 INFO L93 Difference]: Finished difference Result 1409 states and 2796 transitions. [2021-03-10 23:12:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 23:12:11,517 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 [2021-03-10 23:12:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:11,520 INFO L225 Difference]: With dead ends: 1409 [2021-03-10 23:12:11,520 INFO L226 Difference]: Without dead ends: 1402 [2021-03-10 23:12:11,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:12:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-03-10 23:12:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1133. [2021-03-10 23:12:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 1.9902826855123674) internal successors, (2253), 1132 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2253 transitions. [2021-03-10 23:12:11,542 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2253 transitions. Word has length 36 [2021-03-10 23:12:11,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:11,542 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 2253 transitions. [2021-03-10 23:12:11,542 INFO L481 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) [2021-03-10 23:12:11,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2253 transitions. [2021-03-10 23:12:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-03-10 23:12:11,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:11,544 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:11,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 23:12:11,765 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:11,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:11,766 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-03-10 23:12:11,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:11,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752207972] [2021-03-10 23:12:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:12,000 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:12,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752207972] [2021-03-10 23:12:12,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285816572] [2021-03-10 23:12:12,000 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 [2021-03-10 23:12:12,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:12:12,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:12,027 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-03-10 23:12:12,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:12,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:12,443 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 [2021-03-10 23:12:12,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:12,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:12,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:12,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-03-10 23:12:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:12,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:12,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-03-10 23:12:12,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973061371] [2021-03-10 23:12:12,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:12:12,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:12,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:12:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:12:12,467 INFO L87 Difference]: Start difference. First operand 1133 states and 2253 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) [2021-03-10 23:12:13,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:13,327 INFO L93 Difference]: Finished difference Result 2709 states and 5525 transitions. [2021-03-10 23:12:13,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:12:13,328 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 [2021-03-10 23:12:13,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:13,349 INFO L225 Difference]: With dead ends: 2709 [2021-03-10 23:12:13,349 INFO L226 Difference]: Without dead ends: 2389 [2021-03-10 23:12:13,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 976.8ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-03-10 23:12:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 1227. [2021-03-10 23:12:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1226 states have (on average 1.9893964110929854) internal successors, (2439), 1226 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 2439 transitions. [2021-03-10 23:12:13,374 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 2439 transitions. Word has length 38 [2021-03-10 23:12:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:13,374 INFO L480 AbstractCegarLoop]: Abstraction has 1227 states and 2439 transitions. [2021-03-10 23:12:13,375 INFO L481 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) [2021-03-10 23:12:13,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 2439 transitions. [2021-03-10 23:12:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:13,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:13,377 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:13,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 23:12:13,591 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:13,592 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-03-10 23:12:13,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:13,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50664298] [2021-03-10 23:12:13,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:13,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50664298] [2021-03-10 23:12:13,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422705319] [2021-03-10 23:12:13,867 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 [2021-03-10 23:12:13,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:12:13,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:13,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2021-03-10 23:12:13,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:14,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:14,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:14,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:14,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:14,501 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 128 treesize of output 48 [2021-03-10 23:12:14,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:14,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:14,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:14,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-03-10 23:12:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:14,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:14,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-03-10 23:12:14,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849286884] [2021-03-10 23:12:14,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:14,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:14,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:14,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:14,521 INFO L87 Difference]: Start difference. First operand 1227 states and 2439 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) [2021-03-10 23:12:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:14,912 INFO L93 Difference]: Finished difference Result 2615 states and 5316 transitions. [2021-03-10 23:12:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:12:14,913 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 [2021-03-10 23:12:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:14,918 INFO L225 Difference]: With dead ends: 2615 [2021-03-10 23:12:14,918 INFO L226 Difference]: Without dead ends: 2400 [2021-03-10 23:12:14,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 680.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2021-03-10 23:12:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 1257. [2021-03-10 23:12:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.982484076433121) internal successors, (2490), 1256 states have internal predecessors, (2490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2490 transitions. [2021-03-10 23:12:14,944 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2490 transitions. Word has length 39 [2021-03-10 23:12:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:14,944 INFO L480 AbstractCegarLoop]: Abstraction has 1257 states and 2490 transitions. [2021-03-10 23:12:14,944 INFO L481 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) [2021-03-10 23:12:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2490 transitions. [2021-03-10 23:12:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:14,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:14,946 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:15,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:15,168 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:15,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-03-10 23:12:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:15,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943640240] [2021-03-10 23:12:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:15,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943640240] [2021-03-10 23:12:15,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491137623] [2021-03-10 23:12:15,429 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 [2021-03-10 23:12:15,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:12:15,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:15,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:16,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:16,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:16,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:16,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:16,087 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 [2021-03-10 23:12:16,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:16,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:16,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:16,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:16,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:16,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-03-10 23:12:16,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376305797] [2021-03-10 23:12:16,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:16,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:16,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:16,110 INFO L87 Difference]: Start difference. First operand 1257 states and 2490 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) [2021-03-10 23:12:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:16,736 INFO L93 Difference]: Finished difference Result 2116 states and 4241 transitions. [2021-03-10 23:12:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:12:16,737 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 [2021-03-10 23:12:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:16,741 INFO L225 Difference]: With dead ends: 2116 [2021-03-10 23:12:16,741 INFO L226 Difference]: Without dead ends: 2095 [2021-03-10 23:12:16,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 695.9ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-03-10 23:12:16,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1269. [2021-03-10 23:12:16,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 1.9834384858044165) internal successors, (2515), 1268 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 2515 transitions. [2021-03-10 23:12:16,765 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 2515 transitions. Word has length 39 [2021-03-10 23:12:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:16,765 INFO L480 AbstractCegarLoop]: Abstraction has 1269 states and 2515 transitions. [2021-03-10 23:12:16,765 INFO L481 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) [2021-03-10 23:12:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 2515 transitions. [2021-03-10 23:12:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:16,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:16,767 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:16,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 23:12:16,988 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:16,988 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-03-10 23:12:16,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:16,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3053396] [2021-03-10 23:12:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:17,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3053396] [2021-03-10 23:12:17,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773064769] [2021-03-10 23:12:17,227 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 [2021-03-10 23:12:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:17,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:17,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:17,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:17,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:17,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:17,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:17,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:17,874 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 126 treesize of output 48 [2021-03-10 23:12:17,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:17,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:17,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:17,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:17,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:17,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-03-10 23:12:17,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57467960] [2021-03-10 23:12:17,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:12:17,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:17,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:12:17,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:12:17,894 INFO L87 Difference]: Start difference. First operand 1269 states and 2515 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) [2021-03-10 23:12:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:18,600 INFO L93 Difference]: Finished difference Result 2211 states and 4407 transitions. [2021-03-10 23:12:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:12:18,601 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 [2021-03-10 23:12:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:18,604 INFO L225 Difference]: With dead ends: 2211 [2021-03-10 23:12:18,604 INFO L226 Difference]: Without dead ends: 1920 [2021-03-10 23:12:18,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 951.3ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:12:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-03-10 23:12:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1305. [2021-03-10 23:12:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1305 states, 1304 states have (on average 1.9639570552147239) internal successors, (2561), 1304 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 2561 transitions. [2021-03-10 23:12:18,628 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 2561 transitions. Word has length 39 [2021-03-10 23:12:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:18,628 INFO L480 AbstractCegarLoop]: Abstraction has 1305 states and 2561 transitions. [2021-03-10 23:12:18,628 INFO L481 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) [2021-03-10 23:12:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 2561 transitions. [2021-03-10 23:12:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:18,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:18,630 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:18,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:18,847 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:18,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-03-10 23:12:18,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:18,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241460286] [2021-03-10 23:12:18,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:19,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241460286] [2021-03-10 23:12:19,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020073891] [2021-03-10 23:12:19,112 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 [2021-03-10 23:12:19,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:12:19,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:19,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:19,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:19,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:19,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:19,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:19,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:19,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:19,815 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 [2021-03-10 23:12:19,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:19,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:19,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:19,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:19,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:19,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-03-10 23:12:19,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399037509] [2021-03-10 23:12:19,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:19,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:19,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:19,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:19,838 INFO L87 Difference]: Start difference. First operand 1305 states and 2561 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) [2021-03-10 23:12:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:20,237 INFO L93 Difference]: Finished difference Result 2919 states and 5977 transitions. [2021-03-10 23:12:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:12:20,238 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 [2021-03-10 23:12:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:20,243 INFO L225 Difference]: With dead ends: 2919 [2021-03-10 23:12:20,243 INFO L226 Difference]: Without dead ends: 2786 [2021-03-10 23:12:20,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 725.2ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-03-10 23:12:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1038. [2021-03-10 23:12:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1037 states have (on average 1.99228543876567) internal successors, (2066), 1037 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2066 transitions. [2021-03-10 23:12:20,267 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2066 transitions. Word has length 39 [2021-03-10 23:12:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:20,268 INFO L480 AbstractCegarLoop]: Abstraction has 1038 states and 2066 transitions. [2021-03-10 23:12:20,268 INFO L481 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) [2021-03-10 23:12:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2066 transitions. [2021-03-10 23:12:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:20,269 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:20,269 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:20,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 23:12:20,470 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-03-10 23:12:20,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:20,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603389472] [2021-03-10 23:12:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:20,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603389472] [2021-03-10 23:12:20,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210873270] [2021-03-10 23:12:20,752 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) [2021-03-10 23:12:20,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:12:20,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:20,806 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:20,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:21,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:21,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:21,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:21,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:21,503 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 [2021-03-10 23:12:21,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:21,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:21,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:21,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:21,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:21,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-03-10 23:12:21,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046546874] [2021-03-10 23:12:21,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:21,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:21,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:21,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:21,528 INFO L87 Difference]: Start difference. First operand 1038 states and 2066 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) [2021-03-10 23:12:22,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:22,075 INFO L93 Difference]: Finished difference Result 2234 states and 4496 transitions. [2021-03-10 23:12:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:12:22,075 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 [2021-03-10 23:12:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:22,079 INFO L225 Difference]: With dead ends: 2234 [2021-03-10 23:12:22,079 INFO L226 Difference]: Without dead ends: 2208 [2021-03-10 23:12:22,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 761.2ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:22,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-03-10 23:12:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 1107. [2021-03-10 23:12:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1106 states have (on average 1.9819168173598554) internal successors, (2192), 1106 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 2192 transitions. [2021-03-10 23:12:22,103 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 2192 transitions. Word has length 39 [2021-03-10 23:12:22,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:22,104 INFO L480 AbstractCegarLoop]: Abstraction has 1107 states and 2192 transitions. [2021-03-10 23:12:22,104 INFO L481 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) [2021-03-10 23:12:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 2192 transitions. [2021-03-10 23:12:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:22,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:22,106 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:22,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:22,325 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-03-10 23:12:22,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:22,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166730948] [2021-03-10 23:12:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:22,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166730948] [2021-03-10 23:12:22,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156355019] [2021-03-10 23:12:22,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:12:22,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:12:22,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:22,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:22,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:23,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:23,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:23,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:23,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:23,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:23,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:23,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:23,369 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 [2021-03-10 23:12:23,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:23,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:23,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:23,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:23,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:23,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-03-10 23:12:23,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952777822] [2021-03-10 23:12:23,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:12:23,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:12:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:23,389 INFO L87 Difference]: Start difference. First operand 1107 states and 2192 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) [2021-03-10 23:12:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:23,853 INFO L93 Difference]: Finished difference Result 2416 states and 4910 transitions. [2021-03-10 23:12:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:12:23,854 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 [2021-03-10 23:12:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:23,859 INFO L225 Difference]: With dead ends: 2416 [2021-03-10 23:12:23,859 INFO L226 Difference]: Without dead ends: 2350 [2021-03-10 23:12:23,859 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-03-10 23:12:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1011. [2021-03-10 23:12:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 1.995049504950495) internal successors, (2015), 1010 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 2015 transitions. [2021-03-10 23:12:23,882 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 2015 transitions. Word has length 39 [2021-03-10 23:12:23,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:23,882 INFO L480 AbstractCegarLoop]: Abstraction has 1011 states and 2015 transitions. [2021-03-10 23:12:23,882 INFO L481 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) [2021-03-10 23:12:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 2015 transitions. [2021-03-10 23:12:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:23,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:23,884 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:24,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-10 23:12:24,084 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-03-10 23:12:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:24,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633878096] [2021-03-10 23:12:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633878096] [2021-03-10 23:12:24,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528837593] [2021-03-10 23:12:24,415 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 [2021-03-10 23:12:24,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:12:24,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:24,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 60 conjunts are in the unsatisfiable core [2021-03-10 23:12:24,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:24,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:24,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:24,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:24,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:24,985 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 128 treesize of output 48 [2021-03-10 23:12:24,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:24,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:24,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:24,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-03-10 23:12:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:25,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:25,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-03-10 23:12:25,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255845359] [2021-03-10 23:12:25,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:12:25,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:12:25,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:25,002 INFO L87 Difference]: Start difference. First operand 1011 states and 2015 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) [2021-03-10 23:12:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:25,530 INFO L93 Difference]: Finished difference Result 1526 states and 3054 transitions. [2021-03-10 23:12:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:12:25,530 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 [2021-03-10 23:12:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:25,532 INFO L225 Difference]: With dead ends: 1526 [2021-03-10 23:12:25,532 INFO L226 Difference]: Without dead ends: 1500 [2021-03-10 23:12:25,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 863.7ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:12:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-03-10 23:12:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1113. [2021-03-10 23:12:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 1.9820143884892085) internal successors, (2204), 1112 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2204 transitions. [2021-03-10 23:12:25,545 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2204 transitions. Word has length 39 [2021-03-10 23:12:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:25,545 INFO L480 AbstractCegarLoop]: Abstraction has 1113 states and 2204 transitions. [2021-03-10 23:12:25,545 INFO L481 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) [2021-03-10 23:12:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2204 transitions. [2021-03-10 23:12:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:25,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:25,546 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:25,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:25,759 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 60 times [2021-03-10 23:12:25,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:25,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258865419] [2021-03-10 23:12:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:26,033 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:26,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258865419] [2021-03-10 23:12:26,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421182653] [2021-03-10 23:12:26,033 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 [2021-03-10 23:12:26,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:12:26,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:26,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-03-10 23:12:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:26,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:26,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:26,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:26,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:26,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:26,621 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 [2021-03-10 23:12:26,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:26,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:26,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:26,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:26,649 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:26,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:26,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-03-10 23:12:26,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085645569] [2021-03-10 23:12:26,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:12:26,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:26,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:12:26,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:12:26,650 INFO L87 Difference]: Start difference. First operand 1113 states and 2204 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) [2021-03-10 23:12:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:27,410 INFO L93 Difference]: Finished difference Result 1961 states and 3901 transitions. [2021-03-10 23:12:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:12:27,411 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 [2021-03-10 23:12:27,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:27,413 INFO L225 Difference]: With dead ends: 1961 [2021-03-10 23:12:27,413 INFO L226 Difference]: Without dead ends: 1676 [2021-03-10 23:12:27,413 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 925.1ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:12:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2021-03-10 23:12:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1044. [2021-03-10 23:12:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 1.9769894534995207) internal successors, (2062), 1043 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2062 transitions. [2021-03-10 23:12:27,427 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2062 transitions. Word has length 39 [2021-03-10 23:12:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:27,427 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 2062 transitions. [2021-03-10 23:12:27,427 INFO L481 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) [2021-03-10 23:12:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2062 transitions. [2021-03-10 23:12:27,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:27,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:27,428 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:27,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 23:12:27,630 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:27,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 61 times [2021-03-10 23:12:27,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:27,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376297737] [2021-03-10 23:12:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:27,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376297737] [2021-03-10 23:12:27,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425404072] [2021-03-10 23:12:27,926 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 [2021-03-10 23:12:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:27,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:27,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:28,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:28,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:28,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:28,535 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 [2021-03-10 23:12:28,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:28,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:28,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:28,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:28,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:28,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-03-10 23:12:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301422523] [2021-03-10 23:12:28,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:12:28,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:28,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:12:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:28,554 INFO L87 Difference]: Start difference. First operand 1044 states and 2062 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) [2021-03-10 23:12:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:28,895 INFO L93 Difference]: Finished difference Result 2127 states and 4398 transitions. [2021-03-10 23:12:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:12:28,895 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 [2021-03-10 23:12:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:28,897 INFO L225 Difference]: With dead ends: 2127 [2021-03-10 23:12:28,897 INFO L226 Difference]: Without dead ends: 2008 [2021-03-10 23:12:28,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 705.5ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-03-10 23:12:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1050. [2021-03-10 23:12:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.977121067683508) internal successors, (2074), 1049 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) [2021-03-10 23:12:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2074 transitions. [2021-03-10 23:12:28,909 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2074 transitions. Word has length 39 [2021-03-10 23:12:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:28,909 INFO L480 AbstractCegarLoop]: Abstraction has 1050 states and 2074 transitions. [2021-03-10 23:12:28,909 INFO L481 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) [2021-03-10 23:12:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2074 transitions. [2021-03-10 23:12:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:28,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:28,910 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:29,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:29,123 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 62 times [2021-03-10 23:12:29,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:29,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693527720] [2021-03-10 23:12:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:29,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693527720] [2021-03-10 23:12:29,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746264479] [2021-03-10 23:12:29,386 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 [2021-03-10 23:12:29,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:12:29,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:29,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:29,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:29,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:29,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:29,970 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 [2021-03-10 23:12:29,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:29,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:29,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:29,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:29,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:29,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-03-10 23:12:29,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796037541] [2021-03-10 23:12:29,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:12:29,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:29,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:12:29,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:12:29,989 INFO L87 Difference]: Start difference. First operand 1050 states and 2074 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) [2021-03-10 23:12:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:30,455 INFO L93 Difference]: Finished difference Result 1944 states and 3895 transitions. [2021-03-10 23:12:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:12:30,456 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 [2021-03-10 23:12:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:30,458 INFO L225 Difference]: With dead ends: 1944 [2021-03-10 23:12:30,458 INFO L226 Difference]: Without dead ends: 1717 [2021-03-10 23:12:30,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 780.2ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-03-10 23:12:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1155. [2021-03-10 23:12:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.9705372616984402) internal successors, (2274), 1154 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2274 transitions. [2021-03-10 23:12:30,469 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2274 transitions. Word has length 39 [2021-03-10 23:12:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:30,470 INFO L480 AbstractCegarLoop]: Abstraction has 1155 states and 2274 transitions. [2021-03-10 23:12:30,470 INFO L481 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) [2021-03-10 23:12:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2274 transitions. [2021-03-10 23:12:30,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:30,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:30,471 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:30,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 23:12:30,672 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 63 times [2021-03-10 23:12:30,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:30,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026599135] [2021-03-10 23:12:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026599135] [2021-03-10 23:12:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900377105] [2021-03-10 23:12:30,933 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 [2021-03-10 23:12:30,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 23:12:30,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:30,959 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-03-10 23:12:30,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:31,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:31,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:31,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:31,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:31,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:31,532 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 124 treesize of output 48 [2021-03-10 23:12:31,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:31,547 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:12:31,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:31,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:142, output treesize:7 [2021-03-10 23:12:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:31,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:31,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-03-10 23:12:31,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415343296] [2021-03-10 23:12:31,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:31,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:31,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:31,559 INFO L87 Difference]: Start difference. First operand 1155 states and 2274 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) [2021-03-10 23:12:31,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:31,981 INFO L93 Difference]: Finished difference Result 2616 states and 5278 transitions. [2021-03-10 23:12:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:12:31,982 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 [2021-03-10 23:12:31,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:31,985 INFO L225 Difference]: With dead ends: 2616 [2021-03-10 23:12:31,985 INFO L226 Difference]: Without dead ends: 2378 [2021-03-10 23:12:31,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 737.4ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:31,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-03-10 23:12:31,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1137. [2021-03-10 23:12:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 1.965669014084507) internal successors, (2233), 1136 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:32,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2233 transitions. [2021-03-10 23:12:32,001 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2233 transitions. Word has length 39 [2021-03-10 23:12:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:32,001 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 2233 transitions. [2021-03-10 23:12:32,001 INFO L481 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) [2021-03-10 23:12:32,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2233 transitions. [2021-03-10 23:12:32,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:32,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:32,002 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:32,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 23:12:32,203 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:32,204 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 64 times [2021-03-10 23:12:32,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:32,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751175589] [2021-03-10 23:12:32,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:32,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751175589] [2021-03-10 23:12:32,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286995573] [2021-03-10 23:12:32,493 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 [2021-03-10 23:12:32,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:12:32,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:32,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:32,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:33,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:33,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:33,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:33,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:33,109 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 [2021-03-10 23:12:33,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:33,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:33,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:33,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:33,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:33,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-03-10 23:12:33,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121918785] [2021-03-10 23:12:33,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:12:33,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:12:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:33,128 INFO L87 Difference]: Start difference. First operand 1137 states and 2233 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) [2021-03-10 23:12:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:33,440 INFO L93 Difference]: Finished difference Result 2156 states and 4367 transitions. [2021-03-10 23:12:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:12:33,441 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 [2021-03-10 23:12:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:33,443 INFO L225 Difference]: With dead ends: 2156 [2021-03-10 23:12:33,443 INFO L226 Difference]: Without dead ends: 2100 [2021-03-10 23:12:33,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-03-10 23:12:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1143. [2021-03-10 23:12:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 1.9658493870402802) internal successors, (2245), 1142 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:33,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2245 transitions. [2021-03-10 23:12:33,457 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2245 transitions. Word has length 39 [2021-03-10 23:12:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:33,457 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2245 transitions. [2021-03-10 23:12:33,457 INFO L481 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) [2021-03-10 23:12:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2245 transitions. [2021-03-10 23:12:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:33,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:33,458 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:33,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:12:33,659 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 65 times [2021-03-10 23:12:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:33,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648897880] [2021-03-10 23:12:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:33,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648897880] [2021-03-10 23:12:33,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047601330] [2021-03-10 23:12:33,941 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 [2021-03-10 23:12:33,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:12:33,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:33,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:33,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:34,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:34,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:34,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:34,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:34,566 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 [2021-03-10 23:12:34,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:34,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:34,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:34,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:34,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:34,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-03-10 23:12:34,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637454080] [2021-03-10 23:12:34,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:12:34,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:34,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:12:34,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:34,587 INFO L87 Difference]: Start difference. First operand 1143 states and 2245 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) [2021-03-10 23:12:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:35,218 INFO L93 Difference]: Finished difference Result 1725 states and 3447 transitions. [2021-03-10 23:12:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 23:12:35,219 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 [2021-03-10 23:12:35,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:35,221 INFO L225 Difference]: With dead ends: 1725 [2021-03-10 23:12:35,221 INFO L226 Difference]: Without dead ends: 1703 [2021-03-10 23:12:35,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2021-03-10 23:12:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1146. [2021-03-10 23:12:35,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 1.965938864628821) internal successors, (2251), 1145 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:35,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 2251 transitions. [2021-03-10 23:12:35,233 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 2251 transitions. Word has length 39 [2021-03-10 23:12:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:35,233 INFO L480 AbstractCegarLoop]: Abstraction has 1146 states and 2251 transitions. [2021-03-10 23:12:35,233 INFO L481 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) [2021-03-10 23:12:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 2251 transitions. [2021-03-10 23:12:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:35,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:35,234 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:35,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:35,451 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:35,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 66 times [2021-03-10 23:12:35,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:35,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777212115] [2021-03-10 23:12:35,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:35,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777212115] [2021-03-10 23:12:35,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966835697] [2021-03-10 23:12:35,743 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 [2021-03-10 23:12:35,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:12:35,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:35,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:35,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:36,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:36,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:36,310 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 [2021-03-10 23:12:36,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:36,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:36,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:36,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:36,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:36,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-03-10 23:12:36,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627894644] [2021-03-10 23:12:36,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:36,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:36,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:36,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:36,327 INFO L87 Difference]: Start difference. First operand 1146 states and 2251 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) [2021-03-10 23:12:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:37,059 INFO L93 Difference]: Finished difference Result 2894 states and 5954 transitions. [2021-03-10 23:12:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:12:37,060 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 [2021-03-10 23:12:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:37,063 INFO L225 Difference]: With dead ends: 2894 [2021-03-10 23:12:37,063 INFO L226 Difference]: Without dead ends: 2754 [2021-03-10 23:12:37,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 686.9ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:37,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2754 states. [2021-03-10 23:12:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2754 to 633. [2021-03-10 23:12:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.0522151898734178) internal successors, (1297), 632 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1297 transitions. [2021-03-10 23:12:37,076 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1297 transitions. Word has length 39 [2021-03-10 23:12:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:37,076 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1297 transitions. [2021-03-10 23:12:37,076 INFO L481 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) [2021-03-10 23:12:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1297 transitions. [2021-03-10 23:12:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:37,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:37,077 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:37,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:37,277 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 67 times [2021-03-10 23:12:37,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:37,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777026377] [2021-03-10 23:12:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:37,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777026377] [2021-03-10 23:12:37,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794288544] [2021-03-10 23:12:37,561 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 [2021-03-10 23:12:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:37,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:37,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:38,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:38,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:38,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:38,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:38,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:38,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:38,169 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 [2021-03-10 23:12:38,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:38,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:38,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:38,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:38,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:38,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-03-10 23:12:38,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509722075] [2021-03-10 23:12:38,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:38,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:38,188 INFO L87 Difference]: Start difference. First operand 633 states and 1297 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) [2021-03-10 23:12:39,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:39,026 INFO L93 Difference]: Finished difference Result 1914 states and 3966 transitions. [2021-03-10 23:12:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:12:39,027 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 [2021-03-10 23:12:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:39,029 INFO L225 Difference]: With dead ends: 1914 [2021-03-10 23:12:39,030 INFO L226 Difference]: Without dead ends: 1853 [2021-03-10 23:12:39,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 696.0ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-03-10 23:12:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 648. [2021-03-10 23:12:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.041731066460587) internal successors, (1321), 647 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1321 transitions. [2021-03-10 23:12:39,039 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1321 transitions. Word has length 39 [2021-03-10 23:12:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:39,039 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1321 transitions. [2021-03-10 23:12:39,040 INFO L481 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) [2021-03-10 23:12:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1321 transitions. [2021-03-10 23:12:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:39,040 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:39,040 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:39,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:39,241 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 68 times [2021-03-10 23:12:39,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:39,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858481481] [2021-03-10 23:12:39,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:39,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858481481] [2021-03-10 23:12:39,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985346809] [2021-03-10 23:12:39,552 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) [2021-03-10 23:12:39,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:12:39,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:39,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:40,143 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 [2021-03-10 23:12:40,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:40,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:40,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:40,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:40,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:40,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-03-10 23:12:40,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439040968] [2021-03-10 23:12:40,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:12:40,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:40,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:12:40,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:40,163 INFO L87 Difference]: Start difference. First operand 648 states and 1321 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) [2021-03-10 23:12:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:40,748 INFO L93 Difference]: Finished difference Result 1650 states and 3430 transitions. [2021-03-10 23:12:40,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:12:40,748 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 [2021-03-10 23:12:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:40,750 INFO L225 Difference]: With dead ends: 1650 [2021-03-10 23:12:40,750 INFO L226 Difference]: Without dead ends: 1586 [2021-03-10 23:12:40,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 716.1ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-03-10 23:12:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 630. [2021-03-10 23:12:40,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 2.0524642289348174) internal successors, (1291), 629 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1291 transitions. [2021-03-10 23:12:40,758 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1291 transitions. Word has length 39 [2021-03-10 23:12:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:40,758 INFO L480 AbstractCegarLoop]: Abstraction has 630 states and 1291 transitions. [2021-03-10 23:12:40,758 INFO L481 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) [2021-03-10 23:12:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1291 transitions. [2021-03-10 23:12:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:40,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:40,759 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:40,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 23:12:40,960 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:40,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:40,960 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 69 times [2021-03-10 23:12:40,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:40,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468792769] [2021-03-10 23:12:40,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:41,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468792769] [2021-03-10 23:12:41,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259585276] [2021-03-10 23:12:41,234 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 [2021-03-10 23:12:41,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:12:41,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:41,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-03-10 23:12:41,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:41,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:41,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:41,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:41,975 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 122 treesize of output 48 [2021-03-10 23:12:41,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:42,000 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:12:42,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:42,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:140, output treesize:7 [2021-03-10 23:12:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:42,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:42,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-03-10 23:12:42,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602597753] [2021-03-10 23:12:42,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:12:42,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:42,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:12:42,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:12:42,013 INFO L87 Difference]: Start difference. First operand 630 states and 1291 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) [2021-03-10 23:12:43,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:43,441 INFO L93 Difference]: Finished difference Result 1483 states and 2977 transitions. [2021-03-10 23:12:43,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:12:43,441 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 [2021-03-10 23:12:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:43,443 INFO L225 Difference]: With dead ends: 1483 [2021-03-10 23:12:43,443 INFO L226 Difference]: Without dead ends: 1180 [2021-03-10 23:12:43,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1424.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:12:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-03-10 23:12:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 723. [2021-03-10 23:12:43,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.0373961218836567) internal successors, (1471), 722 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:43,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1471 transitions. [2021-03-10 23:12:43,450 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1471 transitions. Word has length 39 [2021-03-10 23:12:43,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:43,450 INFO L480 AbstractCegarLoop]: Abstraction has 723 states and 1471 transitions. [2021-03-10 23:12:43,450 INFO L481 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) [2021-03-10 23:12:43,450 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1471 transitions. [2021-03-10 23:12:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:43,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:43,451 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:43,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:43,655 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:43,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 70 times [2021-03-10 23:12:43,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:43,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815705425] [2021-03-10 23:12:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:43,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815705425] [2021-03-10 23:12:43,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555972718] [2021-03-10 23:12:43,936 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 [2021-03-10 23:12:43,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:12:43,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:43,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:44,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:44,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:44,463 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 [2021-03-10 23:12:44,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:44,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:44,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:44,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:44,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:44,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-03-10 23:12:44,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266948098] [2021-03-10 23:12:44,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:12:44,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:12:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:12:44,481 INFO L87 Difference]: Start difference. First operand 723 states and 1471 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) [2021-03-10 23:12:44,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:44,951 INFO L93 Difference]: Finished difference Result 2073 states and 4358 transitions. [2021-03-10 23:12:44,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:12:44,952 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 [2021-03-10 23:12:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:44,954 INFO L225 Difference]: With dead ends: 2073 [2021-03-10 23:12:44,954 INFO L226 Difference]: Without dead ends: 1942 [2021-03-10 23:12:44,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2021-03-10 23:12:44,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 756. [2021-03-10 23:12:44,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.0357615894039736) internal successors, (1537), 755 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1537 transitions. [2021-03-10 23:12:44,964 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1537 transitions. Word has length 39 [2021-03-10 23:12:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:44,965 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 1537 transitions. [2021-03-10 23:12:44,965 INFO L481 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) [2021-03-10 23:12:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1537 transitions. [2021-03-10 23:12:44,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:44,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:44,965 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:45,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:45,167 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 71 times [2021-03-10 23:12:45,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:45,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970111690] [2021-03-10 23:12:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:45,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970111690] [2021-03-10 23:12:45,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308659588] [2021-03-10 23:12:45,479 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 [2021-03-10 23:12:45,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:12:45,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:45,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-03-10 23:12:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:46,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:46,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:46,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:46,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:46,065 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 [2021-03-10 23:12:46,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:46,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:46,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:46,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:46,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:46,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-03-10 23:12:46,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167296673] [2021-03-10 23:12:46,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:12:46,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:46,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:12:46,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:12:46,085 INFO L87 Difference]: Start difference. First operand 756 states and 1537 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) [2021-03-10 23:12:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:46,698 INFO L93 Difference]: Finished difference Result 1332 states and 2723 transitions. [2021-03-10 23:12:46,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:12:46,699 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 [2021-03-10 23:12:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:46,701 INFO L225 Difference]: With dead ends: 1332 [2021-03-10 23:12:46,701 INFO L226 Difference]: Without dead ends: 1301 [2021-03-10 23:12:46,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 705.6ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:12:46,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-03-10 23:12:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 759. [2021-03-10 23:12:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.0356200527704487) internal successors, (1543), 758 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1543 transitions. [2021-03-10 23:12:46,709 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1543 transitions. Word has length 39 [2021-03-10 23:12:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:46,709 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 1543 transitions. [2021-03-10 23:12:46,709 INFO L481 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) [2021-03-10 23:12:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1543 transitions. [2021-03-10 23:12:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:46,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:46,710 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:46,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:46,911 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:46,911 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 72 times [2021-03-10 23:12:46,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:46,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50365156] [2021-03-10 23:12:46,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:47,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50365156] [2021-03-10 23:12:47,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682948863] [2021-03-10 23:12:47,208 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 [2021-03-10 23:12:47,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:12:47,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:47,233 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:47,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:47,767 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 [2021-03-10 23:12:47,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:47,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:47,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:47,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:47,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:47,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-03-10 23:12:47,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704689527] [2021-03-10 23:12:47,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:12:47,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:12:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:12:47,790 INFO L87 Difference]: Start difference. First operand 759 states and 1543 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) [2021-03-10 23:12:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:48,278 INFO L93 Difference]: Finished difference Result 1790 states and 3676 transitions. [2021-03-10 23:12:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:12:48,278 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 [2021-03-10 23:12:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:48,280 INFO L225 Difference]: With dead ends: 1790 [2021-03-10 23:12:48,280 INFO L226 Difference]: Without dead ends: 1747 [2021-03-10 23:12:48,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 672.2ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:12:48,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-03-10 23:12:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 786. [2021-03-10 23:12:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.034394904458599) internal successors, (1597), 785 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:48,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1597 transitions. [2021-03-10 23:12:48,311 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1597 transitions. Word has length 39 [2021-03-10 23:12:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:48,311 INFO L480 AbstractCegarLoop]: Abstraction has 786 states and 1597 transitions. [2021-03-10 23:12:48,311 INFO L481 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) [2021-03-10 23:12:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1597 transitions. [2021-03-10 23:12:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:48,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:48,312 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:48,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 23:12:48,513 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:48,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 73 times [2021-03-10 23:12:48,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:48,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057123896] [2021-03-10 23:12:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:48,787 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:48,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057123896] [2021-03-10 23:12:48,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876121740] [2021-03-10 23:12:48,788 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 [2021-03-10 23:12:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:48,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:48,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:49,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:49,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:49,257 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 [2021-03-10 23:12:49,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:49,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:49,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:49,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:49,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:49,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-03-10 23:12:49,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768695453] [2021-03-10 23:12:49,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:12:49,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:49,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:12:49,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:12:49,276 INFO L87 Difference]: Start difference. First operand 786 states and 1597 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) [2021-03-10 23:12:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:49,940 INFO L93 Difference]: Finished difference Result 1617 states and 3240 transitions. [2021-03-10 23:12:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:12:49,940 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 [2021-03-10 23:12:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:49,942 INFO L225 Difference]: With dead ends: 1617 [2021-03-10 23:12:49,942 INFO L226 Difference]: Without dead ends: 1342 [2021-03-10 23:12:49,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 916.7ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:49,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-03-10 23:12:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 900. [2021-03-10 23:12:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.0088987764182424) internal successors, (1806), 899 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1806 transitions. [2021-03-10 23:12:49,951 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1806 transitions. Word has length 39 [2021-03-10 23:12:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:49,951 INFO L480 AbstractCegarLoop]: Abstraction has 900 states and 1806 transitions. [2021-03-10 23:12:49,952 INFO L481 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) [2021-03-10 23:12:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1806 transitions. [2021-03-10 23:12:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:49,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:49,953 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:50,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:50,169 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 74 times [2021-03-10 23:12:50,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:50,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528762292] [2021-03-10 23:12:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528762292] [2021-03-10 23:12:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710585174] [2021-03-10 23:12:50,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:12:50,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:12:50,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:50,483 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:50,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:50,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:50,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:50,911 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 [2021-03-10 23:12:50,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:50,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:50,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:50,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:50,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:50,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-03-10 23:12:50,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013100670] [2021-03-10 23:12:50,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:12:50,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:50,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:12:50,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:12:50,930 INFO L87 Difference]: Start difference. First operand 900 states and 1806 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) [2021-03-10 23:12:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:51,681 INFO L93 Difference]: Finished difference Result 1694 states and 3387 transitions. [2021-03-10 23:12:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:12:51,681 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 [2021-03-10 23:12:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:51,683 INFO L225 Difference]: With dead ends: 1694 [2021-03-10 23:12:51,683 INFO L226 Difference]: Without dead ends: 1375 [2021-03-10 23:12:51,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 899.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:12:51,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-03-10 23:12:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 873. [2021-03-10 23:12:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.0240825688073394) internal successors, (1765), 872 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1765 transitions. [2021-03-10 23:12:51,693 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1765 transitions. Word has length 39 [2021-03-10 23:12:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:51,693 INFO L480 AbstractCegarLoop]: Abstraction has 873 states and 1765 transitions. [2021-03-10 23:12:51,693 INFO L481 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) [2021-03-10 23:12:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1765 transitions. [2021-03-10 23:12:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:51,694 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:51,694 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:51,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 23:12:51,910 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 75 times [2021-03-10 23:12:51,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:51,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15554547] [2021-03-10 23:12:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:52,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15554547] [2021-03-10 23:12:52,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564561454] [2021-03-10 23:12:52,181 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 [2021-03-10 23:12:52,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:12:52,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:52,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-03-10 23:12:52,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:52,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:52,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:52,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:52,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:52,843 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 [2021-03-10 23:12:52,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:52,857 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:12:52,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:52,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-03-10 23:12:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:52,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:52,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-03-10 23:12:52,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971041044] [2021-03-10 23:12:52,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:12:52,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:52,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:12:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:12:52,870 INFO L87 Difference]: Start difference. First operand 873 states and 1765 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) [2021-03-10 23:12:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:54,292 INFO L93 Difference]: Finished difference Result 2346 states and 4666 transitions. [2021-03-10 23:12:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:12:54,293 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 [2021-03-10 23:12:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:54,295 INFO L225 Difference]: With dead ends: 2346 [2021-03-10 23:12:54,295 INFO L226 Difference]: Without dead ends: 2017 [2021-03-10 23:12:54,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1474.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:12:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-03-10 23:12:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1218. [2021-03-10 23:12:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.9852095316351686) internal successors, (2416), 1217 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) [2021-03-10 23:12:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 2416 transitions. [2021-03-10 23:12:54,306 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 2416 transitions. Word has length 39 [2021-03-10 23:12:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:54,306 INFO L480 AbstractCegarLoop]: Abstraction has 1218 states and 2416 transitions. [2021-03-10 23:12:54,306 INFO L481 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) [2021-03-10 23:12:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 2416 transitions. [2021-03-10 23:12:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:54,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:54,307 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:54,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:54,508 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:54,508 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 76 times [2021-03-10 23:12:54,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:54,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5314391] [2021-03-10 23:12:54,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5314391] [2021-03-10 23:12:54,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805379569] [2021-03-10 23:12:54,795 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 [2021-03-10 23:12:54,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:12:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:54,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:54,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:55,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:55,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:55,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:55,284 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 [2021-03-10 23:12:55,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:55,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:55,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:55,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:55,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:55,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-03-10 23:12:55,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474114674] [2021-03-10 23:12:55,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:12:55,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:55,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:12:55,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:12:55,304 INFO L87 Difference]: Start difference. First operand 1218 states and 2416 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) [2021-03-10 23:12:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:55,828 INFO L93 Difference]: Finished difference Result 2599 states and 5373 transitions. [2021-03-10 23:12:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:12:55,828 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 [2021-03-10 23:12:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:55,831 INFO L225 Difference]: With dead ends: 2599 [2021-03-10 23:12:55,831 INFO L226 Difference]: Without dead ends: 2445 [2021-03-10 23:12:55,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:12:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-03-10 23:12:55,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1233. [2021-03-10 23:12:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 1.9853896103896105) internal successors, (2446), 1232 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:55,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2446 transitions. [2021-03-10 23:12:55,844 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2446 transitions. Word has length 39 [2021-03-10 23:12:55,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:55,844 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 2446 transitions. [2021-03-10 23:12:55,844 INFO L481 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) [2021-03-10 23:12:55,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2446 transitions. [2021-03-10 23:12:55,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:55,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:55,845 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:56,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:56,046 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 77 times [2021-03-10 23:12:56,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:56,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438132262] [2021-03-10 23:12:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:56,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438132262] [2021-03-10 23:12:56,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226009601] [2021-03-10 23:12:56,314 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 [2021-03-10 23:12:56,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:12:56,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:56,340 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:56,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:56,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:56,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:56,862 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 124 treesize of output 48 [2021-03-10 23:12:56,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:56,877 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:12:56,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:56,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-03-10 23:12:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:56,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:56,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-03-10 23:12:56,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081853892] [2021-03-10 23:12:56,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:12:56,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:56,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:12:56,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:12:56,889 INFO L87 Difference]: Start difference. First operand 1233 states and 2446 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) [2021-03-10 23:12:58,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:58,185 INFO L93 Difference]: Finished difference Result 2072 states and 4125 transitions. [2021-03-10 23:12:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:12:58,186 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 39 [2021-03-10 23:12:58,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:58,189 INFO L225 Difference]: With dead ends: 2072 [2021-03-10 23:12:58,189 INFO L226 Difference]: Without dead ends: 1780 [2021-03-10 23:12:58,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1331.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:12:58,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2021-03-10 23:12:58,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1350. [2021-03-10 23:12:58,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.984432913269088) internal successors, (2677), 1349 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:58,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2677 transitions. [2021-03-10 23:12:58,202 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2677 transitions. Word has length 39 [2021-03-10 23:12:58,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:58,202 INFO L480 AbstractCegarLoop]: Abstraction has 1350 states and 2677 transitions. [2021-03-10 23:12:58,202 INFO L481 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) [2021-03-10 23:12:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2677 transitions. [2021-03-10 23:12:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:58,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:58,204 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:58,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:58,404 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:58,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 78 times [2021-03-10 23:12:58,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:58,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005940075] [2021-03-10 23:12:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:12:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:58,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005940075] [2021-03-10 23:12:58,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357256201] [2021-03-10 23:12:58,672 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 [2021-03-10 23:12:58,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:12:58,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:12:58,695 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:12:58,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:12:59,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:12:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:12:59,107 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 [2021-03-10 23:12:59,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:12:59,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:12:59,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:12:59,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:12:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:12:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:12:59,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-03-10 23:12:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198065246] [2021-03-10 23:12:59,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:12:59,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:12:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:12:59,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:12:59,126 INFO L87 Difference]: Start difference. First operand 1350 states and 2677 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) [2021-03-10 23:12:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:12:59,599 INFO L93 Difference]: Finished difference Result 2412 states and 4891 transitions. [2021-03-10 23:12:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:12:59,600 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 [2021-03-10 23:12:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:12:59,603 INFO L225 Difference]: With dead ends: 2412 [2021-03-10 23:12:59,603 INFO L226 Difference]: Without dead ends: 2356 [2021-03-10 23:12:59,603 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 555.6ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:12:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-03-10 23:12:59,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1335. [2021-03-10 23:12:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1334 states have (on average 1.9827586206896552) internal successors, (2645), 1334 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:12:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2645 transitions. [2021-03-10 23:12:59,618 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2645 transitions. Word has length 39 [2021-03-10 23:12:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:12:59,618 INFO L480 AbstractCegarLoop]: Abstraction has 1335 states and 2645 transitions. [2021-03-10 23:12:59,618 INFO L481 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) [2021-03-10 23:12:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2645 transitions. [2021-03-10 23:12:59,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:12:59,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:12:59,619 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:12:59,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:12:59,820 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:12:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:12:59,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 79 times [2021-03-10 23:12:59,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:12:59,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928605469] [2021-03-10 23:12:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:12:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:00,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928605469] [2021-03-10 23:13:00,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972790618] [2021-03-10 23:13:00,116 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 [2021-03-10 23:13:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:00,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:13:00,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:00,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:00,572 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 [2021-03-10 23:13:00,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:00,578 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:00,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:00,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:13:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:00,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:00,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 23 [2021-03-10 23:13:00,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144184904] [2021-03-10 23:13:00,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:13:00,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:00,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:13:00,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:13:00,590 INFO L87 Difference]: Start difference. First operand 1335 states and 2645 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:01,071 INFO L93 Difference]: Finished difference Result 2950 states and 5975 transitions. [2021-03-10 23:13:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:13:01,072 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:13:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:01,075 INFO L225 Difference]: With dead ends: 2950 [2021-03-10 23:13:01,075 INFO L226 Difference]: Without dead ends: 2886 [2021-03-10 23:13:01,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:13:01,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-03-10 23:13:01,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1341. [2021-03-10 23:13:01,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.9813432835820894) internal successors, (2655), 1340 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:01,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2655 transitions. [2021-03-10 23:13:01,092 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2655 transitions. Word has length 39 [2021-03-10 23:13:01,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:01,092 INFO L480 AbstractCegarLoop]: Abstraction has 1341 states and 2655 transitions. [2021-03-10 23:13:01,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:01,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2655 transitions. [2021-03-10 23:13:01,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:13:01,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:01,094 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:01,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:01,294 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:01,295 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 80 times [2021-03-10 23:13:01,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:01,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999080132] [2021-03-10 23:13:01,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:01,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999080132] [2021-03-10 23:13:01,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481564218] [2021-03-10 23:13:01,619 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 [2021-03-10 23:13:01,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:01,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:01,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:13:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:02,080 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 [2021-03-10 23:13:02,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:02,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:02,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:02,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-03-10 23:13:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:02,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:02,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-03-10 23:13:02,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571864444] [2021-03-10 23:13:02,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:13:02,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:02,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:13:02,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:13:02,099 INFO L87 Difference]: Start difference. First operand 1341 states and 2655 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) [2021-03-10 23:13:02,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:02,616 INFO L93 Difference]: Finished difference Result 2588 states and 5232 transitions. [2021-03-10 23:13:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:13:02,616 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 [2021-03-10 23:13:02,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:02,619 INFO L225 Difference]: With dead ends: 2588 [2021-03-10 23:13:02,619 INFO L226 Difference]: Without dead ends: 2530 [2021-03-10 23:13:02,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 631.2ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:13:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-03-10 23:13:02,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 1341. [2021-03-10 23:13:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.9813432835820894) internal successors, (2655), 1340 states have internal predecessors, (2655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2655 transitions. [2021-03-10 23:13:02,634 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2655 transitions. Word has length 39 [2021-03-10 23:13:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:02,634 INFO L480 AbstractCegarLoop]: Abstraction has 1341 states and 2655 transitions. [2021-03-10 23:13:02,634 INFO L481 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) [2021-03-10 23:13:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2655 transitions. [2021-03-10 23:13:02,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 23:13:02,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:02,635 INFO L519 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:02,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:02,851 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:02,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 81 times [2021-03-10 23:13:02,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:02,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350160545] [2021-03-10 23:13:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:03,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350160545] [2021-03-10 23:13:03,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417024827] [2021-03-10 23:13:03,186 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) [2021-03-10 23:13:03,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:13:03,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:03,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-03-10 23:13:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:03,595 INFO L354 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2021-03-10 23:13:03,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 126 treesize of output 48 [2021-03-10 23:13:03,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:03,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:03,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:03,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:126, output treesize:7 [2021-03-10 23:13:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:03,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:03,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2021-03-10 23:13:03,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213642122] [2021-03-10 23:13:03,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:13:03,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:03,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:13:03,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:13:03,612 INFO L87 Difference]: Start difference. First operand 1341 states and 2655 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:04,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:04,065 INFO L93 Difference]: Finished difference Result 2121 states and 4228 transitions. [2021-03-10 23:13:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 23:13:04,066 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 23:13:04,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:04,067 INFO L225 Difference]: With dead ends: 2121 [2021-03-10 23:13:04,067 INFO L226 Difference]: Without dead ends: 2106 [2021-03-10 23:13:04,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:13:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-03-10 23:13:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1348. [2021-03-10 23:13:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 1.982182628062361) internal successors, (2670), 1347 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) [2021-03-10 23:13:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2670 transitions. [2021-03-10 23:13:04,079 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2670 transitions. Word has length 39 [2021-03-10 23:13:04,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:04,079 INFO L480 AbstractCegarLoop]: Abstraction has 1348 states and 2670 transitions. [2021-03-10 23:13:04,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:04,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2670 transitions. [2021-03-10 23:13:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-10 23:13:04,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:04,080 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:04,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:04,295 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:04,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:04,295 INFO L82 PathProgramCache]: Analyzing trace with hash 2026240682, now seen corresponding path program 82 times [2021-03-10 23:13:04,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:04,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16775424] [2021-03-10 23:13:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:04,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16775424] [2021-03-10 23:13:04,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997585656] [2021-03-10 23:13:04,355 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 [2021-03-10 23:13:04,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 23:13:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 49 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:04,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:04,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 23:13:04,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161167773] [2021-03-10 23:13:04,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 23:13:04,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 23:13:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:13:04,457 INFO L87 Difference]: Start difference. First operand 1348 states and 2670 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-03-10 23:13:04,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:04,500 INFO L93 Difference]: Finished difference Result 1747 states and 3478 transitions. [2021-03-10 23:13:04,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 23:13:04,501 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 40 [2021-03-10 23:13:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:04,502 INFO L225 Difference]: With dead ends: 1747 [2021-03-10 23:13:04,502 INFO L226 Difference]: Without dead ends: 1739 [2021-03-10 23:13:04,503 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-03-10 23:13:04,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-03-10 23:13:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1404. [2021-03-10 23:13:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 1.9928724162508908) internal successors, (2796), 1403 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2796 transitions. [2021-03-10 23:13:04,514 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2796 transitions. Word has length 40 [2021-03-10 23:13:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:04,514 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 2796 transitions. [2021-03-10 23:13:04,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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) [2021-03-10 23:13:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2796 transitions. [2021-03-10 23:13:04,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-03-10 23:13:04,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:04,515 INFO L519 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:04,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 23:13:04,716 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:04,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 83 times [2021-03-10 23:13:04,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:04,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814769850] [2021-03-10 23:13:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:04,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814769850] [2021-03-10 23:13:04,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326880577] [2021-03-10 23:13:04,988 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 [2021-03-10 23:13:05,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:13:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:05,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 61 conjunts are in the unsatisfiable core [2021-03-10 23:13:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:05,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:05,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:05,528 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 128 treesize of output 48 [2021-03-10 23:13:05,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:05,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:05,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:05,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:138, output treesize:7 [2021-03-10 23:13:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:05,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:05,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-03-10 23:13:05,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312001823] [2021-03-10 23:13:05,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:13:05,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:05,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:13:05,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:13:05,547 INFO L87 Difference]: Start difference. First operand 1404 states and 2796 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) [2021-03-10 23:13:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:07,077 INFO L93 Difference]: Finished difference Result 3157 states and 6512 transitions. [2021-03-10 23:13:07,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:13:07,077 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 42 [2021-03-10 23:13:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:07,080 INFO L225 Difference]: With dead ends: 3157 [2021-03-10 23:13:07,080 INFO L226 Difference]: Without dead ends: 3037 [2021-03-10 23:13:07,080 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 28 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1498.5ms TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:13:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-03-10 23:13:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 1410. [2021-03-10 23:13:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 1.992902767920511) internal successors, (2808), 1409 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 2808 transitions. [2021-03-10 23:13:07,097 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 2808 transitions. Word has length 42 [2021-03-10 23:13:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:07,097 INFO L480 AbstractCegarLoop]: Abstraction has 1410 states and 2808 transitions. [2021-03-10 23:13:07,097 INFO L481 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) [2021-03-10 23:13:07,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 2808 transitions. [2021-03-10 23:13:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:07,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:07,099 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:07,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:07,299 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:07,299 INFO L82 PathProgramCache]: Analyzing trace with hash -726200285, now seen corresponding path program 84 times [2021-03-10 23:13:07,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:07,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337355809] [2021-03-10 23:13:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337355809] [2021-03-10 23:13:07,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473055854] [2021-03-10 23:13:07,639 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 [2021-03-10 23:13:07,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:13:07,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:07,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:08,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:08,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:08,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:08,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:08,513 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 [2021-03-10 23:13:08,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:08,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:08,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:08,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:08,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:08,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-03-10 23:13:08,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892287471] [2021-03-10 23:13:08,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:13:08,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:08,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:13:08,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:08,537 INFO L87 Difference]: Start difference. First operand 1410 states and 2808 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) [2021-03-10 23:13:09,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:09,056 INFO L93 Difference]: Finished difference Result 3844 states and 7895 transitions. [2021-03-10 23:13:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:13:09,057 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 [2021-03-10 23:13:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:09,061 INFO L225 Difference]: With dead ends: 3844 [2021-03-10 23:13:09,061 INFO L226 Difference]: Without dead ends: 3682 [2021-03-10 23:13:09,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 977.6ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:09,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-03-10 23:13:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 1587. [2021-03-10 23:13:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 1.980453972257251) internal successors, (3141), 1586 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3141 transitions. [2021-03-10 23:13:09,097 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3141 transitions. Word has length 43 [2021-03-10 23:13:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:09,097 INFO L480 AbstractCegarLoop]: Abstraction has 1587 states and 3141 transitions. [2021-03-10 23:13:09,097 INFO L481 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) [2021-03-10 23:13:09,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3141 transitions. [2021-03-10 23:13:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:09,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:09,099 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:09,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 23:13:09,315 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:09,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:09,315 INFO L82 PathProgramCache]: Analyzing trace with hash 733771603, now seen corresponding path program 85 times [2021-03-10 23:13:09,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:09,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553593522] [2021-03-10 23:13:09,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:09,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553593522] [2021-03-10 23:13:09,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909827502] [2021-03-10 23:13:09,631 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 [2021-03-10 23:13:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:09,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:09,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:10,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:10,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:10,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:10,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:10,497 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 [2021-03-10 23:13:10,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:10,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:10,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:10,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:10,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:10,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-03-10 23:13:10,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819620542] [2021-03-10 23:13:10,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:13:10,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:10,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:13:10,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:10,520 INFO L87 Difference]: Start difference. First operand 1587 states and 3141 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) [2021-03-10 23:13:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:11,208 INFO L93 Difference]: Finished difference Result 3347 states and 6710 transitions. [2021-03-10 23:13:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:13:11,209 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 [2021-03-10 23:13:11,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:11,213 INFO L225 Difference]: With dead ends: 3347 [2021-03-10 23:13:11,213 INFO L226 Difference]: Without dead ends: 3319 [2021-03-10 23:13:11,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:11,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-03-10 23:13:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1629. [2021-03-10 23:13:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 1.9828009828009827) internal successors, (3228), 1628 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3228 transitions. [2021-03-10 23:13:11,232 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3228 transitions. Word has length 43 [2021-03-10 23:13:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:11,232 INFO L480 AbstractCegarLoop]: Abstraction has 1629 states and 3228 transitions. [2021-03-10 23:13:11,232 INFO L481 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) [2021-03-10 23:13:11,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3228 transitions. [2021-03-10 23:13:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:11,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:11,234 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:11,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:11,434 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1669781235, now seen corresponding path program 86 times [2021-03-10 23:13:11,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:11,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454770889] [2021-03-10 23:13:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454770889] [2021-03-10 23:13:11,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60188076] [2021-03-10 23:13:11,793 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 [2021-03-10 23:13:11,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:11,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:12,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:12,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:12,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:12,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:12,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:12,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:12,683 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 [2021-03-10 23:13:12,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:12,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:12,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:12,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:12,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:12,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-03-10 23:13:12,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684633706] [2021-03-10 23:13:12,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:13:12,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:13:12,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:12,705 INFO L87 Difference]: Start difference. First operand 1629 states and 3228 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) [2021-03-10 23:13:13,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:13,814 INFO L93 Difference]: Finished difference Result 4033 states and 8289 transitions. [2021-03-10 23:13:13,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:13:13,815 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 [2021-03-10 23:13:13,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:13,819 INFO L225 Difference]: With dead ends: 4033 [2021-03-10 23:13:13,819 INFO L226 Difference]: Without dead ends: 3863 [2021-03-10 23:13:13,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1009.2ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3863 states. [2021-03-10 23:13:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3863 to 1449. [2021-03-10 23:13:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 1.9848066298342542) internal successors, (2874), 1448 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2874 transitions. [2021-03-10 23:13:13,841 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2874 transitions. Word has length 43 [2021-03-10 23:13:13,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:13,841 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 2874 transitions. [2021-03-10 23:13:13,841 INFO L481 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) [2021-03-10 23:13:13,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2874 transitions. [2021-03-10 23:13:13,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:13,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:13,843 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:14,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:14,043 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:14,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1165214173, now seen corresponding path program 87 times [2021-03-10 23:13:14,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:14,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618533863] [2021-03-10 23:13:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:14,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618533863] [2021-03-10 23:13:14,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975923122] [2021-03-10 23:13:14,438 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 [2021-03-10 23:13:14,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:13:14,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:14,462 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:15,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:15,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:15,326 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 [2021-03-10 23:13:15,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:15,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:15,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:15,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:15,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:15,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-03-10 23:13:15,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647968134] [2021-03-10 23:13:15,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:13:15,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:15,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:13:15,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:15,347 INFO L87 Difference]: Start difference. First operand 1449 states and 2874 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) [2021-03-10 23:13:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:16,624 INFO L93 Difference]: Finished difference Result 3287 states and 6612 transitions. [2021-03-10 23:13:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:13:16,625 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 [2021-03-10 23:13:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:16,628 INFO L225 Difference]: With dead ends: 3287 [2021-03-10 23:13:16,628 INFO L226 Difference]: Without dead ends: 3259 [2021-03-10 23:13:16,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1032.7ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2021-03-10 23:13:16,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 1425. [2021-03-10 23:13:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 1.9901685393258426) internal successors, (2834), 1424 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:16,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 2834 transitions. [2021-03-10 23:13:16,643 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 2834 transitions. Word has length 43 [2021-03-10 23:13:16,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:16,644 INFO L480 AbstractCegarLoop]: Abstraction has 1425 states and 2834 transitions. [2021-03-10 23:13:16,644 INFO L481 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) [2021-03-10 23:13:16,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 2834 transitions. [2021-03-10 23:13:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:16,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:16,645 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:16,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:16,846 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:16,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:16,846 INFO L82 PathProgramCache]: Analyzing trace with hash -2078296685, now seen corresponding path program 88 times [2021-03-10 23:13:16,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:16,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569055121] [2021-03-10 23:13:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:16,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:17,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569055121] [2021-03-10 23:13:17,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484573358] [2021-03-10 23:13:17,225 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 [2021-03-10 23:13:17,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:17,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:18,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:18,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:18,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:18,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:18,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:18,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:18,123 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 [2021-03-10 23:13:18,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:18,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:18,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:18,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:18,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:18,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-03-10 23:13:18,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859224362] [2021-03-10 23:13:18,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:13:18,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:13:18,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:18,148 INFO L87 Difference]: Start difference. First operand 1425 states and 2834 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) [2021-03-10 23:13:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:18,629 INFO L93 Difference]: Finished difference Result 2962 states and 5956 transitions. [2021-03-10 23:13:18,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:13:18,630 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 [2021-03-10 23:13:18,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:18,633 INFO L225 Difference]: With dead ends: 2962 [2021-03-10 23:13:18,633 INFO L226 Difference]: Without dead ends: 2919 [2021-03-10 23:13:18,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1033.5ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2021-03-10 23:13:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 1515. [2021-03-10 23:13:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 1.974900924702774) internal successors, (2990), 1514 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2990 transitions. [2021-03-10 23:13:18,647 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2990 transitions. Word has length 43 [2021-03-10 23:13:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:18,647 INFO L480 AbstractCegarLoop]: Abstraction has 1515 states and 2990 transitions. [2021-03-10 23:13:18,647 INFO L481 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) [2021-03-10 23:13:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2990 transitions. [2021-03-10 23:13:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:18,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:18,649 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:18,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:18,849 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:18,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1073928909, now seen corresponding path program 89 times [2021-03-10 23:13:18,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:18,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895869673] [2021-03-10 23:13:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:13:19,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895869673] [2021-03-10 23:13:19,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529891266] [2021-03-10 23:13:19,149 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 [2021-03-10 23:13:19,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:13:19,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:19,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 68 conjunts are in the unsatisfiable core [2021-03-10 23:13:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:19,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:19,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:19,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:19,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:19,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:19,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:19,998 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 [2021-03-10 23:13:20,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:20,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:20,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:20,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:157, output treesize:7 [2021-03-10 23:13:20,024 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:20,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:20,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-03-10 23:13:20,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821460794] [2021-03-10 23:13:20,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:13:20,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:20,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:13:20,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:13:20,025 INFO L87 Difference]: Start difference. First operand 1515 states and 2990 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) [2021-03-10 23:13:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:20,910 INFO L93 Difference]: Finished difference Result 2604 states and 5185 transitions. [2021-03-10 23:13:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:13:20,911 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 [2021-03-10 23:13:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:20,913 INFO L225 Difference]: With dead ends: 2604 [2021-03-10 23:13:20,913 INFO L226 Difference]: Without dead ends: 2303 [2021-03-10 23:13:20,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1273.9ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:13:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2021-03-10 23:13:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1701. [2021-03-10 23:13:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 1.9764705882352942) internal successors, (3360), 1700 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 3360 transitions. [2021-03-10 23:13:20,927 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 3360 transitions. Word has length 43 [2021-03-10 23:13:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:20,927 INFO L480 AbstractCegarLoop]: Abstraction has 1701 states and 3360 transitions. [2021-03-10 23:13:20,927 INFO L481 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) [2021-03-10 23:13:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 3360 transitions. [2021-03-10 23:13:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:20,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:20,929 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:21,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-03-10 23:13:21,130 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash 850764899, now seen corresponding path program 90 times [2021-03-10 23:13:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:21,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037862551] [2021-03-10 23:13:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037862551] [2021-03-10 23:13:21,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855118608] [2021-03-10 23:13:21,436 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 [2021-03-10 23:13:21,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:13:21,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:21,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:21,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:22,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:22,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:22,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:22,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:22,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:22,302 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 [2021-03-10 23:13:22,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:22,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:22,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:22,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:22,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:22,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-03-10 23:13:22,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530241496] [2021-03-10 23:13:22,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:13:22,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:22,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:13:22,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:13:22,326 INFO L87 Difference]: Start difference. First operand 1701 states and 3360 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) [2021-03-10 23:13:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:23,070 INFO L93 Difference]: Finished difference Result 2999 states and 6043 transitions. [2021-03-10 23:13:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:13:23,071 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 [2021-03-10 23:13:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:23,074 INFO L225 Difference]: With dead ends: 2999 [2021-03-10 23:13:23,074 INFO L226 Difference]: Without dead ends: 2938 [2021-03-10 23:13:23,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 934.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:13:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-03-10 23:13:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1674. [2021-03-10 23:13:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.9701135684399282) internal successors, (3296), 1673 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3296 transitions. [2021-03-10 23:13:23,091 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3296 transitions. Word has length 43 [2021-03-10 23:13:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:23,091 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 3296 transitions. [2021-03-10 23:13:23,091 INFO L481 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) [2021-03-10 23:13:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3296 transitions. [2021-03-10 23:13:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:23,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:23,093 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:23,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:23,293 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1086380131, now seen corresponding path program 91 times [2021-03-10 23:13:23,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:23,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419066169] [2021-03-10 23:13:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:23,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419066169] [2021-03-10 23:13:23,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163027241] [2021-03-10 23:13:23,684 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 [2021-03-10 23:13:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:23,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:23,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:24,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:24,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:24,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:24,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:24,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:24,603 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 [2021-03-10 23:13:24,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:24,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:24,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:24,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:24,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:24,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-03-10 23:13:24,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541145821] [2021-03-10 23:13:24,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:13:24,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:24,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:13:24,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:24,629 INFO L87 Difference]: Start difference. First operand 1674 states and 3296 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) [2021-03-10 23:13:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:25,191 INFO L93 Difference]: Finished difference Result 3421 states and 6991 transitions. [2021-03-10 23:13:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:13:25,192 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 [2021-03-10 23:13:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:25,195 INFO L225 Difference]: With dead ends: 3421 [2021-03-10 23:13:25,195 INFO L226 Difference]: Without dead ends: 3299 [2021-03-10 23:13:25,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1055.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3299 states. [2021-03-10 23:13:25,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3299 to 1686. [2021-03-10 23:13:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 1.970326409495549) internal successors, (3320), 1685 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3320 transitions. [2021-03-10 23:13:25,211 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3320 transitions. Word has length 43 [2021-03-10 23:13:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:25,211 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 3320 transitions. [2021-03-10 23:13:25,211 INFO L481 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) [2021-03-10 23:13:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3320 transitions. [2021-03-10 23:13:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:25,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:25,213 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:25,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-10 23:13:25,415 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1033564323, now seen corresponding path program 92 times [2021-03-10 23:13:25,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:25,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828072762] [2021-03-10 23:13:25,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-10 23:13:25,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828072762] [2021-03-10 23:13:25,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919920846] [2021-03-10 23:13:25,737 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 [2021-03-10 23:13:25,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:25,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:25,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:25,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:26,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:26,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:26,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:26,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:26,657 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 [2021-03-10 23:13:26,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:26,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:26,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:26,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:26,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:26,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 29 [2021-03-10 23:13:26,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185208487] [2021-03-10 23:13:26,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:13:26,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:13:26,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:13:26,680 INFO L87 Difference]: Start difference. First operand 1686 states and 3320 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) [2021-03-10 23:13:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:28,027 INFO L93 Difference]: Finished difference Result 2579 states and 5116 transitions. [2021-03-10 23:13:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:13:28,028 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 [2021-03-10 23:13:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:28,030 INFO L225 Difference]: With dead ends: 2579 [2021-03-10 23:13:28,030 INFO L226 Difference]: Without dead ends: 2287 [2021-03-10 23:13:28,030 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1491.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:13:28,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-03-10 23:13:28,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1812. [2021-03-10 23:13:28,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 1.9690778575372723) internal successors, (3566), 1811 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:28,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 3566 transitions. [2021-03-10 23:13:28,044 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 3566 transitions. Word has length 43 [2021-03-10 23:13:28,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:28,044 INFO L480 AbstractCegarLoop]: Abstraction has 1812 states and 3566 transitions. [2021-03-10 23:13:28,045 INFO L481 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) [2021-03-10 23:13:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 3566 transitions. [2021-03-10 23:13:28,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:28,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:28,046 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:28,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:28,247 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:28,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:28,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1336709165, now seen corresponding path program 93 times [2021-03-10 23:13:28,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:28,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540571674] [2021-03-10 23:13:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:28,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540571674] [2021-03-10 23:13:28,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756698349] [2021-03-10 23:13:28,616 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 [2021-03-10 23:13:28,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:13:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:28,641 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-03-10 23:13:28,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:29,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:29,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:29,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:29,805 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 143 treesize of output 55 [2021-03-10 23:13:29,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:29,827 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:13:29,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:29,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-03-10 23:13:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:29,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:29,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2021-03-10 23:13:29,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636404878] [2021-03-10 23:13:29,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:13:29,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:29,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:13:29,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:13:29,844 INFO L87 Difference]: Start difference. First operand 1812 states and 3566 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) [2021-03-10 23:13:32,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:32,422 INFO L93 Difference]: Finished difference Result 3260 states and 6509 transitions. [2021-03-10 23:13:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:13:32,423 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 [2021-03-10 23:13:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:32,426 INFO L225 Difference]: With dead ends: 3260 [2021-03-10 23:13:32,426 INFO L226 Difference]: Without dead ends: 2995 [2021-03-10 23:13:32,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2558.7ms TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:13:32,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-03-10 23:13:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1821. [2021-03-10 23:13:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 1.9664835164835164) internal successors, (3579), 1820 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:32,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 3579 transitions. [2021-03-10 23:13:32,443 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 3579 transitions. Word has length 43 [2021-03-10 23:13:32,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:32,443 INFO L480 AbstractCegarLoop]: Abstraction has 1821 states and 3579 transitions. [2021-03-10 23:13:32,443 INFO L481 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) [2021-03-10 23:13:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 3579 transitions. [2021-03-10 23:13:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:32,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:32,444 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:32,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:32,645 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash 994068947, now seen corresponding path program 94 times [2021-03-10 23:13:32,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:32,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193215725] [2021-03-10 23:13:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:33,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193215725] [2021-03-10 23:13:33,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098955301] [2021-03-10 23:13:33,047 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 [2021-03-10 23:13:33,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:33,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:33,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:33,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:33,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:33,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:33,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:34,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:34,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:34,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:34,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:34,018 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 [2021-03-10 23:13:34,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:34,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:34,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:34,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:34,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:34,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2021-03-10 23:13:34,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221822113] [2021-03-10 23:13:34,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:13:34,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:13:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:34,042 INFO L87 Difference]: Start difference. First operand 1821 states and 3579 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) [2021-03-10 23:13:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:34,691 INFO L93 Difference]: Finished difference Result 3746 states and 7528 transitions. [2021-03-10 23:13:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:13:34,692 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 [2021-03-10 23:13:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:34,696 INFO L225 Difference]: With dead ends: 3746 [2021-03-10 23:13:34,696 INFO L226 Difference]: Without dead ends: 3682 [2021-03-10 23:13:34,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1115.8ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2021-03-10 23:13:34,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 1830. [2021-03-10 23:13:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1829 states have (on average 1.9617277200656096) internal successors, (3588), 1829 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 3588 transitions. [2021-03-10 23:13:34,715 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 3588 transitions. Word has length 43 [2021-03-10 23:13:34,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:34,715 INFO L480 AbstractCegarLoop]: Abstraction has 1830 states and 3588 transitions. [2021-03-10 23:13:34,715 INFO L481 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) [2021-03-10 23:13:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 3588 transitions. [2021-03-10 23:13:34,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:34,717 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:34,717 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:34,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 23:13:34,917 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:34,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1101093933, now seen corresponding path program 95 times [2021-03-10 23:13:34,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:34,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232456624] [2021-03-10 23:13:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:35,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232456624] [2021-03-10 23:13:35,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498788522] [2021-03-10 23:13:35,377 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 [2021-03-10 23:13:35,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:13:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:35,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-03-10 23:13:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:36,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:36,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:36,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:36,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:36,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:36,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:36,376 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 [2021-03-10 23:13:36,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:36,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:36,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:36,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:36,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:36,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-03-10 23:13:36,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605517843] [2021-03-10 23:13:36,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:13:36,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:36,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:13:36,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:36,406 INFO L87 Difference]: Start difference. First operand 1830 states and 3588 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) [2021-03-10 23:13:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:37,406 INFO L93 Difference]: Finished difference Result 3760 states and 7587 transitions. [2021-03-10 23:13:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:13:37,407 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 [2021-03-10 23:13:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:37,411 INFO L225 Difference]: With dead ends: 3760 [2021-03-10 23:13:37,411 INFO L226 Difference]: Without dead ends: 3482 [2021-03-10 23:13:37,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1174.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2021-03-10 23:13:37,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 1878. [2021-03-10 23:13:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 1.9611081513052744) internal successors, (3681), 1877 states have internal predecessors, (3681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 3681 transitions. [2021-03-10 23:13:37,430 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 3681 transitions. Word has length 43 [2021-03-10 23:13:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:37,430 INFO L480 AbstractCegarLoop]: Abstraction has 1878 states and 3681 transitions. [2021-03-10 23:13:37,430 INFO L481 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) [2021-03-10 23:13:37,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 3681 transitions. [2021-03-10 23:13:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:37,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:37,432 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:37,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 23:13:37,633 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:37,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:37,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1208361635, now seen corresponding path program 96 times [2021-03-10 23:13:37,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:37,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631267394] [2021-03-10 23:13:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:38,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631267394] [2021-03-10 23:13:38,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390055968] [2021-03-10 23:13:38,056 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 [2021-03-10 23:13:38,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:13:38,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:38,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-03-10 23:13:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:39,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:39,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:39,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:39,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:39,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:39,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:39,165 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 149 treesize of output 55 [2021-03-10 23:13:39,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:39,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:39,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:39,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:159, output treesize:7 [2021-03-10 23:13:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:39,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:39,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 33 [2021-03-10 23:13:39,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092472534] [2021-03-10 23:13:39,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:13:39,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:13:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:39,193 INFO L87 Difference]: Start difference. First operand 1878 states and 3681 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) [2021-03-10 23:13:40,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:40,088 INFO L93 Difference]: Finished difference Result 3102 states and 6171 transitions. [2021-03-10 23:13:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:13:40,090 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 [2021-03-10 23:13:40,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:40,094 INFO L225 Difference]: With dead ends: 3102 [2021-03-10 23:13:40,094 INFO L226 Difference]: Without dead ends: 3079 [2021-03-10 23:13:40,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1207.1ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:13:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2021-03-10 23:13:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 1881. [2021-03-10 23:13:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 1.9611702127659574) internal successors, (3687), 1880 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 3687 transitions. [2021-03-10 23:13:40,113 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 3687 transitions. Word has length 43 [2021-03-10 23:13:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:40,113 INFO L480 AbstractCegarLoop]: Abstraction has 1881 states and 3687 transitions. [2021-03-10 23:13:40,113 INFO L481 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) [2021-03-10 23:13:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 3687 transitions. [2021-03-10 23:13:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:40,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:40,115 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:40,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:40,316 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:40,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:40,316 INFO L82 PathProgramCache]: Analyzing trace with hash 236561603, now seen corresponding path program 97 times [2021-03-10 23:13:40,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:40,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73566214] [2021-03-10 23:13:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:40,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73566214] [2021-03-10 23:13:40,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320088678] [2021-03-10 23:13:40,829 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 [2021-03-10 23:13:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:40,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:40,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:41,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:41,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:41,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:41,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:41,844 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 [2021-03-10 23:13:41,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:41,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:41,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:41,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:41,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:41,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-03-10 23:13:41,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957194504] [2021-03-10 23:13:41,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:13:41,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:13:41,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:41,866 INFO L87 Difference]: Start difference. First operand 1881 states and 3687 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) [2021-03-10 23:13:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:42,755 INFO L93 Difference]: Finished difference Result 3862 states and 7721 transitions. [2021-03-10 23:13:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:13:42,756 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 [2021-03-10 23:13:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:42,760 INFO L225 Difference]: With dead ends: 3862 [2021-03-10 23:13:42,760 INFO L226 Difference]: Without dead ends: 3792 [2021-03-10 23:13:42,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1252.0ms TimeCoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-03-10 23:13:42,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2037. [2021-03-10 23:13:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 1.9553045186640472) internal successors, (3981), 2036 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:42,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 3981 transitions. [2021-03-10 23:13:42,793 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 3981 transitions. Word has length 43 [2021-03-10 23:13:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:42,793 INFO L480 AbstractCegarLoop]: Abstraction has 2037 states and 3981 transitions. [2021-03-10 23:13:42,793 INFO L481 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) [2021-03-10 23:13:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 3981 transitions. [2021-03-10 23:13:42,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:42,795 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:42,795 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:42,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 23:13:42,995 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:42,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:42,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1240929379, now seen corresponding path program 98 times [2021-03-10 23:13:42,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:42,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79397386] [2021-03-10 23:13:42,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79397386] [2021-03-10 23:13:43,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026152947] [2021-03-10 23:13:43,373 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 [2021-03-10 23:13:43,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:13:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:43,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:43,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:44,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:44,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:44,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:44,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:44,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:44,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:44,243 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 [2021-03-10 23:13:44,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:44,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:44,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:44,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:44,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:44,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-03-10 23:13:44,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762240242] [2021-03-10 23:13:44,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:13:44,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:44,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:13:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:13:44,274 INFO L87 Difference]: Start difference. First operand 2037 states and 3981 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) [2021-03-10 23:13:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:46,107 INFO L93 Difference]: Finished difference Result 3413 states and 6729 transitions. [2021-03-10 23:13:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:13:46,108 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 [2021-03-10 23:13:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:46,111 INFO L225 Difference]: With dead ends: 3413 [2021-03-10 23:13:46,111 INFO L226 Difference]: Without dead ends: 3051 [2021-03-10 23:13:46,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1468.4ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:13:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-03-10 23:13:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2373. [2021-03-10 23:13:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2372 states have (on average 1.963743676222597) internal successors, (4658), 2372 states have internal predecessors, (4658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4658 transitions. [2021-03-10 23:13:46,134 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4658 transitions. Word has length 43 [2021-03-10 23:13:46,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:46,134 INFO L480 AbstractCegarLoop]: Abstraction has 2373 states and 4658 transitions. [2021-03-10 23:13:46,134 INFO L481 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) [2021-03-10 23:13:46,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4658 transitions. [2021-03-10 23:13:46,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:46,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:46,136 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:46,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 23:13:46,336 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:46,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:46,337 INFO L82 PathProgramCache]: Analyzing trace with hash -893728877, now seen corresponding path program 99 times [2021-03-10 23:13:46,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:46,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587440383] [2021-03-10 23:13:46,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:46,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587440383] [2021-03-10 23:13:46,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538709947] [2021-03-10 23:13:46,749 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 [2021-03-10 23:13:46,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:13:46,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:46,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:47,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:47,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:47,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:47,817 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 [2021-03-10 23:13:47,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:47,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:47,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:47,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:47,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:47,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-03-10 23:13:47,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142770214] [2021-03-10 23:13:47,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:13:47,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:47,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:13:47,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:47,847 INFO L87 Difference]: Start difference. First operand 2373 states and 4658 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) [2021-03-10 23:13:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:49,098 INFO L93 Difference]: Finished difference Result 4290 states and 8728 transitions. [2021-03-10 23:13:49,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:13:49,099 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 [2021-03-10 23:13:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:49,103 INFO L225 Difference]: With dead ends: 4290 [2021-03-10 23:13:49,103 INFO L226 Difference]: Without dead ends: 4136 [2021-03-10 23:13:49,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1179.6ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:13:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2021-03-10 23:13:49,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 2409. [2021-03-10 23:13:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 1.9642857142857142) internal successors, (4730), 2408 states have internal predecessors, (4730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 4730 transitions. [2021-03-10 23:13:49,128 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 4730 transitions. Word has length 43 [2021-03-10 23:13:49,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:49,129 INFO L480 AbstractCegarLoop]: Abstraction has 2409 states and 4730 transitions. [2021-03-10 23:13:49,129 INFO L481 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) [2021-03-10 23:13:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 4730 transitions. [2021-03-10 23:13:49,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:49,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:49,130 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:49,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 23:13:49,331 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:49,332 INFO L82 PathProgramCache]: Analyzing trace with hash -946544685, now seen corresponding path program 100 times [2021-03-10 23:13:49,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:49,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313965896] [2021-03-10 23:13:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:49,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313965896] [2021-03-10 23:13:49,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768949575] [2021-03-10 23:13:49,726 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 [2021-03-10 23:13:49,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:13:49,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:49,748 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:13:49,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:50,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:50,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:50,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:50,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:50,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:50,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:50,632 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 [2021-03-10 23:13:50,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:50,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:50,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:50,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:13:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 29 [2021-03-10 23:13:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815960873] [2021-03-10 23:13:50,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:13:50,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:50,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:13:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:13:50,660 INFO L87 Difference]: Start difference. First operand 2409 states and 4730 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) [2021-03-10 23:13:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:52,481 INFO L93 Difference]: Finished difference Result 3794 states and 7472 transitions. [2021-03-10 23:13:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:13:52,482 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 [2021-03-10 23:13:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:52,485 INFO L225 Difference]: With dead ends: 3794 [2021-03-10 23:13:52,485 INFO L226 Difference]: Without dead ends: 3434 [2021-03-10 23:13:52,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1634.7ms TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:13:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-03-10 23:13:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2729. [2021-03-10 23:13:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2729 states, 2728 states have (on average 1.9659090909090908) internal successors, (5363), 2728 states have internal predecessors, (5363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2729 states to 2729 states and 5363 transitions. [2021-03-10 23:13:52,508 INFO L78 Accepts]: Start accepts. Automaton has 2729 states and 5363 transitions. Word has length 43 [2021-03-10 23:13:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:52,508 INFO L480 AbstractCegarLoop]: Abstraction has 2729 states and 5363 transitions. [2021-03-10 23:13:52,508 INFO L481 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) [2021-03-10 23:13:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2729 states and 5363 transitions. [2021-03-10 23:13:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:52,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:52,510 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:52,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:13:52,710 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash -986040061, now seen corresponding path program 101 times [2021-03-10 23:13:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:52,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082493465] [2021-03-10 23:13:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:53,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082493465] [2021-03-10 23:13:53,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212972816] [2021-03-10 23:13:53,167 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 [2021-03-10 23:13:53,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:13:53,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:53,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 66 conjunts are in the unsatisfiable core [2021-03-10 23:13:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:54,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:54,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:54,400 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 [2021-03-10 23:13:54,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:13:54,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:13:54,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:13:54,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-03-10 23:13:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:54,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:13:54,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-03-10 23:13:54,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341449361] [2021-03-10 23:13:54,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:13:54,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:13:54,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:13:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:13:54,449 INFO L87 Difference]: Start difference. First operand 2729 states and 5363 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:58,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:13:58,226 INFO L93 Difference]: Finished difference Result 5362 states and 10750 transitions. [2021-03-10 23:13:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:13:58,227 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-10 23:13:58,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:13:58,232 INFO L225 Difference]: With dead ends: 5362 [2021-03-10 23:13:58,232 INFO L226 Difference]: Without dead ends: 5088 [2021-03-10 23:13:58,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 3450.3ms TimeCoverageRelationStatistics Valid=254, Invalid=2938, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:13:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-03-10 23:13:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 2798. [2021-03-10 23:13:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 1.9646049338577047) internal successors, (5495), 2797 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 5495 transitions. [2021-03-10 23:13:58,262 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 5495 transitions. Word has length 43 [2021-03-10 23:13:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:13:58,262 INFO L480 AbstractCegarLoop]: Abstraction has 2798 states and 5495 transitions. [2021-03-10 23:13:58,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:13:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 5495 transitions. [2021-03-10 23:13:58,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:13:58,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:13:58,264 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:13:58,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-03-10 23:13:58,464 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:13:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:13:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1213764355, now seen corresponding path program 102 times [2021-03-10 23:13:58,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:13:58,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979472516] [2021-03-10 23:13:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:13:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:13:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:13:58,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979472516] [2021-03-10 23:13:58,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376168833] [2021-03-10 23:13:58,982 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 [2021-03-10 23:13:59,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:13:59,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:13:59,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-03-10 23:13:59,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:13:59,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:59,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:13:59,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:13:59,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:00,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:00,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:00,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:00,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:00,039 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 [2021-03-10 23:14:00,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:00,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:00,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:00,053 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:00,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:00,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-03-10 23:14:00,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27725178] [2021-03-10 23:14:00,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:00,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:00,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:00,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:00,075 INFO L87 Difference]: Start difference. First operand 2798 states and 5495 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) [2021-03-10 23:14:00,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:00,652 INFO L93 Difference]: Finished difference Result 4701 states and 9445 transitions. [2021-03-10 23:14:00,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:14:00,653 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 [2021-03-10 23:14:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:00,657 INFO L225 Difference]: With dead ends: 4701 [2021-03-10 23:14:00,658 INFO L226 Difference]: Without dead ends: 4425 [2021-03-10 23:14:00,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1268.3ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2021-03-10 23:14:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 2861. [2021-03-10 23:14:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 1.966083916083916) internal successors, (5623), 2860 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 5623 transitions. [2021-03-10 23:14:00,688 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 5623 transitions. Word has length 43 [2021-03-10 23:14:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:00,688 INFO L480 AbstractCegarLoop]: Abstraction has 2861 states and 5623 transitions. [2021-03-10 23:14:00,688 INFO L481 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) [2021-03-10 23:14:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 5623 transitions. [2021-03-10 23:14:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:00,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:00,690 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:00,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 23:14:00,890 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:00,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:00,890 INFO L82 PathProgramCache]: Analyzing trace with hash -771747373, now seen corresponding path program 103 times [2021-03-10 23:14:00,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:00,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895272450] [2021-03-10 23:14:00,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:01,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895272450] [2021-03-10 23:14:01,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854708888] [2021-03-10 23:14:01,460 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 [2021-03-10 23:14:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:01,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:01,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:02,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:02,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:02,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:02,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:02,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:02,651 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 [2021-03-10 23:14:02,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:02,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:02,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:02,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:02,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:02,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-03-10 23:14:02,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16916835] [2021-03-10 23:14:02,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:02,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:02,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:02,680 INFO L87 Difference]: Start difference. First operand 2861 states and 5623 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) [2021-03-10 23:14:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:03,913 INFO L93 Difference]: Finished difference Result 4013 states and 7977 transitions. [2021-03-10 23:14:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:14:03,915 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 [2021-03-10 23:14:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:03,919 INFO L225 Difference]: With dead ends: 4013 [2021-03-10 23:14:03,919 INFO L226 Difference]: Without dead ends: 3990 [2021-03-10 23:14:03,919 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1426.5ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:03,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2021-03-10 23:14:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 2861. [2021-03-10 23:14:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2861 states, 2860 states have (on average 1.966083916083916) internal successors, (5623), 2860 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 5623 transitions. [2021-03-10 23:14:03,951 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 5623 transitions. Word has length 43 [2021-03-10 23:14:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:03,951 INFO L480 AbstractCegarLoop]: Abstraction has 2861 states and 5623 transitions. [2021-03-10 23:14:03,951 INFO L481 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) [2021-03-10 23:14:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 5623 transitions. [2021-03-10 23:14:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:03,963 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:03,963 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:04,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:04,163 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1004072413, now seen corresponding path program 104 times [2021-03-10 23:14:04,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:04,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700901045] [2021-03-10 23:14:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:04,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700901045] [2021-03-10 23:14:04,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162176285] [2021-03-10 23:14:04,718 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 [2021-03-10 23:14:04,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:04,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:04,739 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:04,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:05,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:05,816 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 [2021-03-10 23:14:05,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:05,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:05,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:05,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:05,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:05,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-03-10 23:14:05,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661573921] [2021-03-10 23:14:05,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:14:05,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:14:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:14:05,854 INFO L87 Difference]: Start difference. First operand 2861 states and 5623 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) [2021-03-10 23:14:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:06,481 INFO L93 Difference]: Finished difference Result 5745 states and 11638 transitions. [2021-03-10 23:14:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:14:06,482 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 [2021-03-10 23:14:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:06,487 INFO L225 Difference]: With dead ends: 5745 [2021-03-10 23:14:06,487 INFO L226 Difference]: Without dead ends: 5532 [2021-03-10 23:14:06,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1335.2ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:14:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-03-10 23:14:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 2943. [2021-03-10 23:14:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2943 states, 2942 states have (on average 1.9687287559483344) internal successors, (5792), 2942 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:06,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2943 states to 2943 states and 5792 transitions. [2021-03-10 23:14:06,519 INFO L78 Accepts]: Start accepts. Automaton has 2943 states and 5792 transitions. Word has length 43 [2021-03-10 23:14:06,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:06,519 INFO L480 AbstractCegarLoop]: Abstraction has 2943 states and 5792 transitions. [2021-03-10 23:14:06,519 INFO L481 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) [2021-03-10 23:14:06,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2943 states and 5792 transitions. [2021-03-10 23:14:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:06,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:06,521 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:06,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:06,722 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1103420819, now seen corresponding path program 105 times [2021-03-10 23:14:06,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:06,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592589544] [2021-03-10 23:14:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592589544] [2021-03-10 23:14:07,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306279127] [2021-03-10 23:14:07,292 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 [2021-03-10 23:14:07,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:14:07,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:07,317 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:08,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:08,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:08,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:08,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:08,435 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 [2021-03-10 23:14:08,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:08,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:08,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:08,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:08,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:08,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-03-10 23:14:08,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37820333] [2021-03-10 23:14:08,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:14:08,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:08,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:14:08,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:14:08,476 INFO L87 Difference]: Start difference. First operand 2943 states and 5792 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) [2021-03-10 23:14:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:09,139 INFO L93 Difference]: Finished difference Result 4892 states and 9785 transitions. [2021-03-10 23:14:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:14:09,140 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 [2021-03-10 23:14:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:09,145 INFO L225 Difference]: With dead ends: 4892 [2021-03-10 23:14:09,145 INFO L226 Difference]: Without dead ends: 4834 [2021-03-10 23:14:09,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1377.5ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:14:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4834 states. [2021-03-10 23:14:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4834 to 2958. [2021-03-10 23:14:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 1.9688873858640514) internal successors, (5822), 2957 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 5822 transitions. [2021-03-10 23:14:09,181 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 5822 transitions. Word has length 43 [2021-03-10 23:14:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:09,181 INFO L480 AbstractCegarLoop]: Abstraction has 2958 states and 5822 transitions. [2021-03-10 23:14:09,181 INFO L481 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) [2021-03-10 23:14:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 5822 transitions. [2021-03-10 23:14:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:09,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:09,183 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:09,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:09,395 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:09,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -882090909, now seen corresponding path program 106 times [2021-03-10 23:14:09,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:09,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196069353] [2021-03-10 23:14:09,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:09,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196069353] [2021-03-10 23:14:09,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283501726] [2021-03-10 23:14:09,971 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 [2021-03-10 23:14:09,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:09,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:09,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:11,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:11,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:11,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:11,144 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 [2021-03-10 23:14:11,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:11,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:11,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:11,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:11,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:11,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 31 [2021-03-10 23:14:11,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770770344] [2021-03-10 23:14:11,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:14:11,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:11,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:14:11,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:14:11,181 INFO L87 Difference]: Start difference. First operand 2958 states and 5822 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) [2021-03-10 23:14:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:12,512 INFO L93 Difference]: Finished difference Result 4303 states and 8543 transitions. [2021-03-10 23:14:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:14:12,512 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 [2021-03-10 23:14:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:12,516 INFO L225 Difference]: With dead ends: 4303 [2021-03-10 23:14:12,516 INFO L226 Difference]: Without dead ends: 4280 [2021-03-10 23:14:12,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1409.9ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:14:12,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4280 states. [2021-03-10 23:14:12,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4280 to 2958. [2021-03-10 23:14:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 1.9688873858640514) internal successors, (5822), 2957 states have internal predecessors, (5822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 5822 transitions. [2021-03-10 23:14:12,541 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 5822 transitions. Word has length 43 [2021-03-10 23:14:12,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:12,541 INFO L480 AbstractCegarLoop]: Abstraction has 2958 states and 5822 transitions. [2021-03-10 23:14:12,541 INFO L481 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) [2021-03-10 23:14:12,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 5822 transitions. [2021-03-10 23:14:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:12,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:12,543 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:12,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:12,743 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:12,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:12,744 INFO L82 PathProgramCache]: Analyzing trace with hash 204094867, now seen corresponding path program 107 times [2021-03-10 23:14:12,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:12,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273300766] [2021-03-10 23:14:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273300766] [2021-03-10 23:14:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338886608] [2021-03-10 23:14:13,240 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 [2021-03-10 23:14:13,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:14:13,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:13,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:13,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:14,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:14,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:14,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:14,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:14,461 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 143 treesize of output 55 [2021-03-10 23:14:14,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:14,487 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:14:14,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:14,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-03-10 23:14:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:14,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:14,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 27 [2021-03-10 23:14:14,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014151924] [2021-03-10 23:14:14,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:14:14,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:14,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:14:14,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:14:14,510 INFO L87 Difference]: Start difference. First operand 2958 states and 5822 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) [2021-03-10 23:14:16,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:16,332 INFO L93 Difference]: Finished difference Result 4827 states and 9541 transitions. [2021-03-10 23:14:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:14:16,334 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 [2021-03-10 23:14:16,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:16,338 INFO L225 Difference]: With dead ends: 4827 [2021-03-10 23:14:16,338 INFO L226 Difference]: Without dead ends: 4543 [2021-03-10 23:14:16,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1758.1ms TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:14:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-03-10 23:14:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 3175. [2021-03-10 23:14:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 1.9757403906742281) internal successors, (6271), 3174 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 6271 transitions. [2021-03-10 23:14:16,368 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 6271 transitions. Word has length 43 [2021-03-10 23:14:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:16,368 INFO L480 AbstractCegarLoop]: Abstraction has 3175 states and 6271 transitions. [2021-03-10 23:14:16,368 INFO L481 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) [2021-03-10 23:14:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 6271 transitions. [2021-03-10 23:14:16,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:16,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:16,370 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:16,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 23:14:16,571 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:16,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:16,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1930563389, now seen corresponding path program 108 times [2021-03-10 23:14:16,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:16,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179489395] [2021-03-10 23:14:16,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:17,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179489395] [2021-03-10 23:14:17,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939468296] [2021-03-10 23:14:17,189 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 [2021-03-10 23:14:17,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:14:17,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:17,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 67 conjunts are in the unsatisfiable core [2021-03-10 23:14:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:18,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:18,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:18,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:18,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:18,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:18,284 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 [2021-03-10 23:14:18,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:18,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:18,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:18,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:18,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:18,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-03-10 23:14:18,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594132079] [2021-03-10 23:14:18,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:14:18,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:18,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:14:18,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:14:18,308 INFO L87 Difference]: Start difference. First operand 3175 states and 6271 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) [2021-03-10 23:14:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:19,630 INFO L93 Difference]: Finished difference Result 5429 states and 10936 transitions. [2021-03-10 23:14:19,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:14:19,632 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 [2021-03-10 23:14:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:19,637 INFO L225 Difference]: With dead ends: 5429 [2021-03-10 23:14:19,637 INFO L226 Difference]: Without dead ends: 5122 [2021-03-10 23:14:19,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1400.3ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:14:19,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-03-10 23:14:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 3238. [2021-03-10 23:14:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 1.9777571825764597) internal successors, (6402), 3237 states have internal predecessors, (6402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 6402 transitions. [2021-03-10 23:14:19,675 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 6402 transitions. Word has length 43 [2021-03-10 23:14:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:19,675 INFO L480 AbstractCegarLoop]: Abstraction has 3238 states and 6402 transitions. [2021-03-10 23:14:19,675 INFO L481 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) [2021-03-10 23:14:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 6402 transitions. [2021-03-10 23:14:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:19,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:19,678 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:19,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 23:14:19,886 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 378892179, now seen corresponding path program 109 times [2021-03-10 23:14:19,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:19,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423767664] [2021-03-10 23:14:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:20,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423767664] [2021-03-10 23:14:20,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782929038] [2021-03-10 23:14:20,514 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 [2021-03-10 23:14:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:20,535 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:20,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:21,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:21,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:21,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:21,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:21,618 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 [2021-03-10 23:14:21,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:21,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:21,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:21,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:21,657 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:21,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:21,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 30 [2021-03-10 23:14:21,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589017718] [2021-03-10 23:14:21,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:14:21,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:21,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:14:21,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:14:21,657 INFO L87 Difference]: Start difference. First operand 3238 states and 6402 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) [2021-03-10 23:14:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:22,921 INFO L93 Difference]: Finished difference Result 4542 states and 9066 transitions. [2021-03-10 23:14:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:14:22,923 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 [2021-03-10 23:14:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:22,927 INFO L225 Difference]: With dead ends: 4542 [2021-03-10 23:14:22,927 INFO L226 Difference]: Without dead ends: 4519 [2021-03-10 23:14:22,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1384.5ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:14:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-03-10 23:14:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3241. [2021-03-10 23:14:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3241 states, 3240 states have (on average 1.9777777777777779) internal successors, (6408), 3240 states have internal predecessors, (6408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3241 states to 3241 states and 6408 transitions. [2021-03-10 23:14:22,959 INFO L78 Accepts]: Start accepts. Automaton has 3241 states and 6408 transitions. Word has length 43 [2021-03-10 23:14:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:22,959 INFO L480 AbstractCegarLoop]: Abstraction has 3241 states and 6408 transitions. [2021-03-10 23:14:22,959 INFO L481 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) [2021-03-10 23:14:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3241 states and 6408 transitions. [2021-03-10 23:14:22,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:22,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:22,962 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:23,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 23:14:23,175 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:23,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2138105379, now seen corresponding path program 110 times [2021-03-10 23:14:23,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:23,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827885720] [2021-03-10 23:14:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:23,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827885720] [2021-03-10 23:14:23,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903568426] [2021-03-10 23:14:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:14:23,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:23,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:23,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:24,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:24,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:24,811 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 [2021-03-10 23:14:24,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:24,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:24,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:24,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:24,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:24,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2021-03-10 23:14:24,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693835027] [2021-03-10 23:14:24,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:14:24,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:24,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:14:24,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:14:24,856 INFO L87 Difference]: Start difference. First operand 3241 states and 6408 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) [2021-03-10 23:14:25,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:25,606 INFO L93 Difference]: Finished difference Result 5186 states and 10401 transitions. [2021-03-10 23:14:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:14:25,607 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 [2021-03-10 23:14:25,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:25,612 INFO L225 Difference]: With dead ends: 5186 [2021-03-10 23:14:25,612 INFO L226 Difference]: Without dead ends: 5141 [2021-03-10 23:14:25,613 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1300.1ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:14:25,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2021-03-10 23:14:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 3277. [2021-03-10 23:14:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 1.978937728937729) internal successors, (6483), 3276 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 6483 transitions. [2021-03-10 23:14:25,649 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 6483 transitions. Word has length 43 [2021-03-10 23:14:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:25,649 INFO L480 AbstractCegarLoop]: Abstraction has 3277 states and 6483 transitions. [2021-03-10 23:14:25,649 INFO L481 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) [2021-03-10 23:14:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 6483 transitions. [2021-03-10 23:14:25,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:25,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:25,651 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:25,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:25,852 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:25,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:25,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1246050477, now seen corresponding path program 111 times [2021-03-10 23:14:25,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:25,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548984470] [2021-03-10 23:14:25,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:26,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548984470] [2021-03-10 23:14:26,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863367023] [2021-03-10 23:14:26,442 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 [2021-03-10 23:14:26,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:14:26,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:26,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:27,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:27,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:27,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:27,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:27,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:27,639 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 [2021-03-10 23:14:27,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:27,661 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:14:27,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:27,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:163, output treesize:7 [2021-03-10 23:14:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:27,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:27,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 32 [2021-03-10 23:14:27,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972325106] [2021-03-10 23:14:27,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:27,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:27,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:27,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:27,680 INFO L87 Difference]: Start difference. First operand 3277 states and 6483 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) [2021-03-10 23:14:30,116 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2021-03-10 23:14:30,389 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-03-10 23:14:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:30,673 INFO L93 Difference]: Finished difference Result 5171 states and 10255 transitions. [2021-03-10 23:14:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:14:30,675 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 [2021-03-10 23:14:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:30,679 INFO L225 Difference]: With dead ends: 5171 [2021-03-10 23:14:30,679 INFO L226 Difference]: Without dead ends: 4788 [2021-03-10 23:14:30,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 3250.8ms TimeCoverageRelationStatistics Valid=248, Invalid=2508, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:14:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2021-03-10 23:14:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 3720. [2021-03-10 23:14:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 3719 states have (on average 1.973648830330734) internal successors, (7340), 3719 states have internal predecessors, (7340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 7340 transitions. [2021-03-10 23:14:30,708 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 7340 transitions. Word has length 43 [2021-03-10 23:14:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:30,709 INFO L480 AbstractCegarLoop]: Abstraction has 3720 states and 7340 transitions. [2021-03-10 23:14:30,709 INFO L481 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) [2021-03-10 23:14:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 7340 transitions. [2021-03-10 23:14:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:30,711 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:30,711 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:30,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-03-10 23:14:30,926 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:30,926 INFO L82 PathProgramCache]: Analyzing trace with hash 214609235, now seen corresponding path program 112 times [2021-03-10 23:14:30,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:30,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197053984] [2021-03-10 23:14:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:31,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197053984] [2021-03-10 23:14:31,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098092322] [2021-03-10 23:14:31,307 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 [2021-03-10 23:14:31,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:31,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:32,145 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 [2021-03-10 23:14:32,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:32,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:32,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:32,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:32,171 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:32,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:32,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-03-10 23:14:32,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532267700] [2021-03-10 23:14:32,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:14:32,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:32,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:14:32,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:14:32,172 INFO L87 Difference]: Start difference. First operand 3720 states and 7340 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) [2021-03-10 23:14:33,527 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-03-10 23:14:33,684 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-03-10 23:14:33,873 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-03-10 23:14:34,090 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 72 [2021-03-10 23:14:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:34,173 INFO L93 Difference]: Finished difference Result 6763 states and 13577 transitions. [2021-03-10 23:14:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:14:34,175 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 [2021-03-10 23:14:34,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:34,182 INFO L225 Difference]: With dead ends: 6763 [2021-03-10 23:14:34,182 INFO L226 Difference]: Without dead ends: 6360 [2021-03-10 23:14:34,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2134.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:14:34,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6360 states. [2021-03-10 23:14:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6360 to 3973. [2021-03-10 23:14:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3973 states, 3972 states have (on average 1.9763343403826787) internal successors, (7850), 3972 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3973 states to 3973 states and 7850 transitions. [2021-03-10 23:14:34,222 INFO L78 Accepts]: Start accepts. Automaton has 3973 states and 7850 transitions. Word has length 43 [2021-03-10 23:14:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:34,222 INFO L480 AbstractCegarLoop]: Abstraction has 3973 states and 7850 transitions. [2021-03-10 23:14:34,223 INFO L481 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) [2021-03-10 23:14:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3973 states and 7850 transitions. [2021-03-10 23:14:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:34,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:34,225 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:34,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:34,425 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1068380643, now seen corresponding path program 113 times [2021-03-10 23:14:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:34,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899349364] [2021-03-10 23:14:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:14:34,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899349364] [2021-03-10 23:14:34,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306092333] [2021-03-10 23:14:34,828 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 [2021-03-10 23:14:34,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:14:34,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:34,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:35,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:35,912 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 [2021-03-10 23:14:35,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:35,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:35,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:35,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:112, output treesize:3 [2021-03-10 23:14:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:35,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:35,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 32 [2021-03-10 23:14:35,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696450006] [2021-03-10 23:14:35,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:14:35,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:35,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:14:35,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:14:35,956 INFO L87 Difference]: Start difference. First operand 3973 states and 7850 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) [2021-03-10 23:14:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:38,217 INFO L93 Difference]: Finished difference Result 5185 states and 10268 transitions. [2021-03-10 23:14:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:14:38,218 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 [2021-03-10 23:14:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:38,223 INFO L225 Difference]: With dead ends: 5185 [2021-03-10 23:14:38,223 INFO L226 Difference]: Without dead ends: 5076 [2021-03-10 23:14:38,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2416.3ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:14:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-03-10 23:14:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4044. [2021-03-10 23:14:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4044 states, 4043 states have (on average 1.9784813257482068) internal successors, (7999), 4043 states have internal predecessors, (7999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4044 states to 4044 states and 7999 transitions. [2021-03-10 23:14:38,259 INFO L78 Accepts]: Start accepts. Automaton has 4044 states and 7999 transitions. Word has length 43 [2021-03-10 23:14:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:38,260 INFO L480 AbstractCegarLoop]: Abstraction has 4044 states and 7999 transitions. [2021-03-10 23:14:38,260 INFO L481 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) [2021-03-10 23:14:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4044 states and 7999 transitions. [2021-03-10 23:14:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:38,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:38,262 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:38,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 23:14:38,467 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash -198698669, now seen corresponding path program 114 times [2021-03-10 23:14:38,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:38,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408691497] [2021-03-10 23:14:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:38,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408691497] [2021-03-10 23:14:38,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454751531] [2021-03-10 23:14:38,863 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 [2021-03-10 23:14:38,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:14:38,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:38,885 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:38,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:39,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:39,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:39,684 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 [2021-03-10 23:14:39,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:39,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:39,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:39,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:39,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:39,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-03-10 23:14:39,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846595147] [2021-03-10 23:14:39,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:14:39,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:39,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:14:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:14:39,715 INFO L87 Difference]: Start difference. First operand 4044 states and 7999 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) [2021-03-10 23:14:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:40,364 INFO L93 Difference]: Finished difference Result 6010 states and 11912 transitions. [2021-03-10 23:14:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:14:40,365 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 [2021-03-10 23:14:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:40,371 INFO L225 Difference]: With dead ends: 6010 [2021-03-10 23:14:40,371 INFO L226 Difference]: Without dead ends: 5742 [2021-03-10 23:14:40,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 959.6ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:14:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5742 states. [2021-03-10 23:14:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5742 to 4235. [2021-03-10 23:14:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4235 states, 4234 states have (on average 1.9825224374114312) internal successors, (8394), 4234 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 8394 transitions. [2021-03-10 23:14:40,408 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 8394 transitions. Word has length 43 [2021-03-10 23:14:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:40,408 INFO L480 AbstractCegarLoop]: Abstraction has 4235 states and 8394 transitions. [2021-03-10 23:14:40,408 INFO L481 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) [2021-03-10 23:14:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 8394 transitions. [2021-03-10 23:14:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:40,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:40,411 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:40,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:40,611 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1284041555, now seen corresponding path program 115 times [2021-03-10 23:14:40,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:40,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703602378] [2021-03-10 23:14:40,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:41,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703602378] [2021-03-10 23:14:41,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639565943] [2021-03-10 23:14:41,015 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 [2021-03-10 23:14:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:41,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:41,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:41,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:41,899 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 [2021-03-10 23:14:41,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:41,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:41,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:41,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:41,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:41,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 25 [2021-03-10 23:14:41,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522295073] [2021-03-10 23:14:41,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:14:41,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:14:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:14:41,927 INFO L87 Difference]: Start difference. First operand 4235 states and 8394 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) [2021-03-10 23:14:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:42,468 INFO L93 Difference]: Finished difference Result 6529 states and 13076 transitions. [2021-03-10 23:14:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:14:42,470 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 [2021-03-10 23:14:42,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:42,476 INFO L225 Difference]: With dead ends: 6529 [2021-03-10 23:14:42,476 INFO L226 Difference]: Without dead ends: 6284 [2021-03-10 23:14:42,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1031.5ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:14:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6284 states. [2021-03-10 23:14:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6284 to 4748. [2021-03-10 23:14:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4748 states, 4747 states have (on average 1.9974720876342953) internal successors, (9482), 4747 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4748 states to 4748 states and 9482 transitions. [2021-03-10 23:14:42,526 INFO L78 Accepts]: Start accepts. Automaton has 4748 states and 9482 transitions. Word has length 43 [2021-03-10 23:14:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:42,526 INFO L480 AbstractCegarLoop]: Abstraction has 4748 states and 9482 transitions. [2021-03-10 23:14:42,526 INFO L481 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) [2021-03-10 23:14:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand 4748 states and 9482 transitions. [2021-03-10 23:14:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:42,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:42,529 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:42,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:42,729 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:42,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:42,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1550266029, now seen corresponding path program 116 times [2021-03-10 23:14:42,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:42,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875714724] [2021-03-10 23:14:42,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:43,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875714724] [2021-03-10 23:14:43,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137348625] [2021-03-10 23:14:43,218 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 [2021-03-10 23:14:43,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:43,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:43,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:43,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:44,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:44,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:44,043 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 [2021-03-10 23:14:44,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:44,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:44,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:44,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:44,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:44,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 26 [2021-03-10 23:14:44,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214673894] [2021-03-10 23:14:44,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:14:44,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:44,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:14:44,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:14:44,072 INFO L87 Difference]: Start difference. First operand 4748 states and 9482 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) [2021-03-10 23:14:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:44,768 INFO L93 Difference]: Finished difference Result 7359 states and 14824 transitions. [2021-03-10 23:14:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:14:44,769 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 [2021-03-10 23:14:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:44,776 INFO L225 Difference]: With dead ends: 7359 [2021-03-10 23:14:44,776 INFO L226 Difference]: Without dead ends: 7294 [2021-03-10 23:14:44,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1037.8ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:14:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2021-03-10 23:14:44,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 4580. [2021-03-10 23:14:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 1.9903909150469534) internal successors, (9114), 4579 states have internal predecessors, (9114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 9114 transitions. [2021-03-10 23:14:44,819 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 9114 transitions. Word has length 43 [2021-03-10 23:14:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:44,819 INFO L480 AbstractCegarLoop]: Abstraction has 4580 states and 9114 transitions. [2021-03-10 23:14:44,820 INFO L481 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) [2021-03-10 23:14:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 9114 transitions. [2021-03-10 23:14:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:44,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:44,822 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:45,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-03-10 23:14:45,023 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1458838867, now seen corresponding path program 117 times [2021-03-10 23:14:45,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:45,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292514572] [2021-03-10 23:14:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:45,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292514572] [2021-03-10 23:14:45,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4632411] [2021-03-10 23:14:45,635 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 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 [2021-03-10 23:14:45,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:14:45,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:45,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:45,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:46,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:46,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:46,512 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 [2021-03-10 23:14:46,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:46,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:46,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:46,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:46,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:46,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-03-10 23:14:46,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694630809] [2021-03-10 23:14:46,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:14:46,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:14:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:14:46,542 INFO L87 Difference]: Start difference. First operand 4580 states and 9114 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) [2021-03-10 23:14:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:47,668 INFO L93 Difference]: Finished difference Result 6924 states and 14042 transitions. [2021-03-10 23:14:47,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:14:47,669 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 [2021-03-10 23:14:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:47,675 INFO L225 Difference]: With dead ends: 6924 [2021-03-10 23:14:47,675 INFO L226 Difference]: Without dead ends: 6799 [2021-03-10 23:14:47,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1194.3ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:14:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6799 states. [2021-03-10 23:14:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6799 to 4595. [2021-03-10 23:14:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4594 states have (on average 1.9906399651719635) internal successors, (9145), 4594 states have internal predecessors, (9145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 9145 transitions. [2021-03-10 23:14:47,715 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 9145 transitions. Word has length 43 [2021-03-10 23:14:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:47,715 INFO L480 AbstractCegarLoop]: Abstraction has 4595 states and 9145 transitions. [2021-03-10 23:14:47,715 INFO L481 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) [2021-03-10 23:14:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 9145 transitions. [2021-03-10 23:14:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:47,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:47,718 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:47,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-03-10 23:14:47,918 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:47,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2103144989, now seen corresponding path program 118 times [2021-03-10 23:14:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:47,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453586443] [2021-03-10 23:14:47,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:48,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453586443] [2021-03-10 23:14:48,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170585068] [2021-03-10 23:14:48,340 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 [2021-03-10 23:14:48,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:14:48,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:48,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:48,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:49,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:49,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:49,100 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 [2021-03-10 23:14:49,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:49,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:49,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:49,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:49,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:49,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 24 [2021-03-10 23:14:49,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906480942] [2021-03-10 23:14:49,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:14:49,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:49,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:14:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:14:49,131 INFO L87 Difference]: Start difference. First operand 4595 states and 9145 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) [2021-03-10 23:14:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:49,820 INFO L93 Difference]: Finished difference Result 6133 states and 12271 transitions. [2021-03-10 23:14:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:14:49,821 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 [2021-03-10 23:14:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:49,826 INFO L225 Difference]: With dead ends: 6133 [2021-03-10 23:14:49,827 INFO L226 Difference]: Without dead ends: 5898 [2021-03-10 23:14:49,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 938.4ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:14:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5898 states. [2021-03-10 23:14:49,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5898 to 4735. [2021-03-10 23:14:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 1.9951415293620616) internal successors, (9445), 4734 states have internal predecessors, (9445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 9445 transitions. [2021-03-10 23:14:49,875 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 9445 transitions. Word has length 43 [2021-03-10 23:14:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:49,875 INFO L480 AbstractCegarLoop]: Abstraction has 4735 states and 9445 transitions. [2021-03-10 23:14:49,875 INFO L481 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) [2021-03-10 23:14:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 9445 transitions. [2021-03-10 23:14:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:49,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:49,878 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:50,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:50,078 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:50,079 INFO L82 PathProgramCache]: Analyzing trace with hash -642485277, now seen corresponding path program 119 times [2021-03-10 23:14:50,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:50,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097759797] [2021-03-10 23:14:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:50,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097759797] [2021-03-10 23:14:50,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396474713] [2021-03-10 23:14:50,557 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 [2021-03-10 23:14:50,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:14:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:50,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:51,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:51,438 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 [2021-03-10 23:14:51,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:51,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:51,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:51,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:51,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:51,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-03-10 23:14:51,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018064895] [2021-03-10 23:14:51,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:14:51,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:51,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:14:51,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:14:51,496 INFO L87 Difference]: Start difference. First operand 4735 states and 9445 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) [2021-03-10 23:14:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:52,404 INFO L93 Difference]: Finished difference Result 6939 states and 13951 transitions. [2021-03-10 23:14:52,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:14:52,405 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 [2021-03-10 23:14:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:52,412 INFO L225 Difference]: With dead ends: 6939 [2021-03-10 23:14:52,412 INFO L226 Difference]: Without dead ends: 6879 [2021-03-10 23:14:52,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1059.0ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:14:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6879 states. [2021-03-10 23:14:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6879 to 4676. [2021-03-10 23:14:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4676 states, 4675 states have (on average 1.9929411764705882) internal successors, (9317), 4675 states have internal predecessors, (9317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4676 states to 4676 states and 9317 transitions. [2021-03-10 23:14:52,458 INFO L78 Accepts]: Start accepts. Automaton has 4676 states and 9317 transitions. Word has length 43 [2021-03-10 23:14:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:52,458 INFO L480 AbstractCegarLoop]: Abstraction has 4676 states and 9317 transitions. [2021-03-10 23:14:52,458 INFO L481 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) [2021-03-10 23:14:52,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4676 states and 9317 transitions. [2021-03-10 23:14:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:52,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:52,461 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:52,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 23:14:52,662 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:52,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1402807837, now seen corresponding path program 120 times [2021-03-10 23:14:52,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:52,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666704341] [2021-03-10 23:14:52,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:52,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666704341] [2021-03-10 23:14:53,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194703083] [2021-03-10 23:14:53,179 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 [2021-03-10 23:14:53,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:14:53,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:53,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:54,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:54,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:54,107 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 [2021-03-10 23:14:54,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:54,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:54,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:54,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:54,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:54,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 26 [2021-03-10 23:14:54,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568977175] [2021-03-10 23:14:54,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:14:54,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:54,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:14:54,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:14:54,140 INFO L87 Difference]: Start difference. First operand 4676 states and 9317 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) [2021-03-10 23:14:54,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:54,751 INFO L93 Difference]: Finished difference Result 7544 states and 15246 transitions. [2021-03-10 23:14:54,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:14:54,752 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 [2021-03-10 23:14:54,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:54,759 INFO L225 Difference]: With dead ends: 7544 [2021-03-10 23:14:54,759 INFO L226 Difference]: Without dead ends: 7476 [2021-03-10 23:14:54,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1154.1ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:14:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-03-10 23:14:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 4686. [2021-03-10 23:14:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4685 states have (on average 1.9929562433297758) internal successors, (9337), 4685 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 9337 transitions. [2021-03-10 23:14:54,803 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 9337 transitions. Word has length 43 [2021-03-10 23:14:54,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:54,803 INFO L480 AbstractCegarLoop]: Abstraction has 4686 states and 9337 transitions. [2021-03-10 23:14:54,803 INFO L481 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) [2021-03-10 23:14:54,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 9337 transitions. [2021-03-10 23:14:54,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:54,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:54,806 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:55,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:14:55,007 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:55,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1928347677, now seen corresponding path program 121 times [2021-03-10 23:14:55,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:55,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392105370] [2021-03-10 23:14:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:55,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392105370] [2021-03-10 23:14:55,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354904905] [2021-03-10 23:14:55,536 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 [2021-03-10 23:14:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:55,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:55,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:56,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:14:56,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:14:56,421 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 [2021-03-10 23:14:56,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:56,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:56,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:56,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:14:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:56,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:56,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-03-10 23:14:56,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887730292] [2021-03-10 23:14:56,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:14:56,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:56,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:14:56,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:14:56,456 INFO L87 Difference]: Start difference. First operand 4686 states and 9337 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) [2021-03-10 23:14:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:57,560 INFO L93 Difference]: Finished difference Result 6877 states and 13860 transitions. [2021-03-10 23:14:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:14:57,561 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 [2021-03-10 23:14:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:57,568 INFO L225 Difference]: With dead ends: 6877 [2021-03-10 23:14:57,568 INFO L226 Difference]: Without dead ends: 6817 [2021-03-10 23:14:57,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1110.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:14:57,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6817 states. [2021-03-10 23:14:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6817 to 4686. [2021-03-10 23:14:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4686 states, 4685 states have (on average 1.9929562433297758) internal successors, (9337), 4685 states have internal predecessors, (9337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 9337 transitions. [2021-03-10 23:14:57,609 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 9337 transitions. Word has length 43 [2021-03-10 23:14:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:57,609 INFO L480 AbstractCegarLoop]: Abstraction has 4686 states and 9337 transitions. [2021-03-10 23:14:57,609 INFO L481 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) [2021-03-10 23:14:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 9337 transitions. [2021-03-10 23:14:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-10 23:14:57,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:57,612 INFO L519 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:14:57,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 23:14:57,813 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:14:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:14:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash 945298195, now seen corresponding path program 122 times [2021-03-10 23:14:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:14:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032088733] [2021-03-10 23:14:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:14:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:14:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:58,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032088733] [2021-03-10 23:14:58,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133773030] [2021-03-10 23:14:58,383 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 [2021-03-10 23:14:58,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:14:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:14:58,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:14:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:14:59,091 INFO L354 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2021-03-10 23:14:59,091 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 [2021-03-10 23:14:59,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:14:59,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:14:59,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:14:59,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:145, output treesize:7 [2021-03-10 23:14:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:14:59,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:14:59,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 26 [2021-03-10 23:14:59,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415420048] [2021-03-10 23:14:59,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:14:59,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:14:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:14:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:14:59,119 INFO L87 Difference]: Start difference. First operand 4686 states and 9337 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) [2021-03-10 23:14:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:14:59,772 INFO L93 Difference]: Finished difference Result 6304 states and 12632 transitions. [2021-03-10 23:14:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:14:59,774 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 [2021-03-10 23:14:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:14:59,780 INFO L225 Difference]: With dead ends: 6304 [2021-03-10 23:14:59,781 INFO L226 Difference]: Without dead ends: 6289 [2021-03-10 23:14:59,781 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1051.7ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:14:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-03-10 23:14:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 4693. [2021-03-10 23:14:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4693 states, 4692 states have (on average 1.9931798806479113) internal successors, (9352), 4692 states have internal predecessors, (9352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:14:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 9352 transitions. [2021-03-10 23:14:59,830 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 9352 transitions. Word has length 43 [2021-03-10 23:14:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:14:59,830 INFO L480 AbstractCegarLoop]: Abstraction has 4693 states and 9352 transitions. [2021-03-10 23:14:59,830 INFO L481 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) [2021-03-10 23:14:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 9352 transitions. [2021-03-10 23:14:59,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 23:14:59,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:14:59,833 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:00,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:00,034 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash -930359854, now seen corresponding path program 123 times [2021-03-10 23:15:00,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:00,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56969974] [2021-03-10 23:15:00,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:00,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56969974] [2021-03-10 23:15:00,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037700233] [2021-03-10 23:15:00,130 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 [2021-03-10 23:15:00,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 23:15:00,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:00,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 23:15:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:00,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:00,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 23:15:00,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414720749] [2021-03-10 23:15:00,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:15:00,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:00,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:15:00,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:15:00,296 INFO L87 Difference]: Start difference. First operand 4693 states and 9352 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) [2021-03-10 23:15:00,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:00,374 INFO L93 Difference]: Finished difference Result 5175 states and 10331 transitions. [2021-03-10 23:15:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 23:15:00,375 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 [2021-03-10 23:15:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:00,380 INFO L225 Difference]: With dead ends: 5175 [2021-03-10 23:15:00,380 INFO L226 Difference]: Without dead ends: 5166 [2021-03-10 23:15:00,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:15:00,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2021-03-10 23:15:00,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4756. [2021-03-10 23:15:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4756 states, 4755 states have (on average 1.9964248159831757) internal successors, (9493), 4755 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4756 states to 4756 states and 9493 transitions. [2021-03-10 23:15:00,428 INFO L78 Accepts]: Start accepts. Automaton has 4756 states and 9493 transitions. Word has length 44 [2021-03-10 23:15:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:00,428 INFO L480 AbstractCegarLoop]: Abstraction has 4756 states and 9493 transitions. [2021-03-10 23:15:00,428 INFO L481 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) [2021-03-10 23:15:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4756 states and 9493 transitions. [2021-03-10 23:15:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-10 23:15:00,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:00,432 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:00,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-03-10 23:15:00,633 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash -748801414, now seen corresponding path program 124 times [2021-03-10 23:15:00,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:00,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933612529] [2021-03-10 23:15:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:01,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933612529] [2021-03-10 23:15:01,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815896572] [2021-03-10 23:15:01,153 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 [2021-03-10 23:15:01,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:01,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:01,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 65 conjunts are in the unsatisfiable core [2021-03-10 23:15:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:02,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:02,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:02,227 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 [2021-03-10 23:15:02,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:02,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:02,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:02,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:151, output treesize:7 [2021-03-10 23:15:02,280 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:02,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:02,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 27 [2021-03-10 23:15:02,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026775583] [2021-03-10 23:15:02,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:15:02,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:02,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:15:02,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:15:02,281 INFO L87 Difference]: Start difference. First operand 4756 states and 9493 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) [2021-03-10 23:15:04,996 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-03-10 23:15:05,323 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2021-03-10 23:15:05,479 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 70 [2021-03-10 23:15:05,681 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-03-10 23:15:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:05,705 INFO L93 Difference]: Finished difference Result 8064 states and 16421 transitions. [2021-03-10 23:15:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:15:05,706 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 [2021-03-10 23:15:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:05,713 INFO L225 Difference]: With dead ends: 8064 [2021-03-10 23:15:05,713 INFO L226 Difference]: Without dead ends: 7944 [2021-03-10 23:15:05,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 3393.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1892, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:15:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7944 states. [2021-03-10 23:15:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7944 to 4781. [2021-03-10 23:15:05,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4781 states, 4780 states have (on average 1.9972803347280335) internal successors, (9547), 4780 states have internal predecessors, (9547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4781 states to 4781 states and 9547 transitions. [2021-03-10 23:15:05,760 INFO L78 Accepts]: Start accepts. Automaton has 4781 states and 9547 transitions. Word has length 46 [2021-03-10 23:15:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:05,761 INFO L480 AbstractCegarLoop]: Abstraction has 4781 states and 9547 transitions. [2021-03-10 23:15:05,761 INFO L481 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) [2021-03-10 23:15:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4781 states and 9547 transitions. [2021-03-10 23:15:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:05,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:05,764 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:05,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-10 23:15:05,964 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 91309083, now seen corresponding path program 125 times [2021-03-10 23:15:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:05,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397968832] [2021-03-10 23:15:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:05,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:06,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397968832] [2021-03-10 23:15:06,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656625301] [2021-03-10 23:15:06,597 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 [2021-03-10 23:15:06,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:15:06,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:06,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:15:06,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:08,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:08,139 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 [2021-03-10 23:15:08,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:08,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:08,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:08,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:15:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:08,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:08,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:15:08,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780493657] [2021-03-10 23:15:08,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:08,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:08,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:08,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:08,175 INFO L87 Difference]: Start difference. First operand 4781 states and 9547 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) [2021-03-10 23:15:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:09,484 INFO L93 Difference]: Finished difference Result 9005 states and 18294 transitions. [2021-03-10 23:15:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:15:09,485 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 [2021-03-10 23:15:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:09,493 INFO L225 Difference]: With dead ends: 9005 [2021-03-10 23:15:09,494 INFO L226 Difference]: Without dead ends: 8868 [2021-03-10 23:15:09,494 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1794.6ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8868 states. [2021-03-10 23:15:09,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8868 to 4838. [2021-03-10 23:15:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 1.9973123837089104) internal successors, (9661), 4837 states have internal predecessors, (9661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 9661 transitions. [2021-03-10 23:15:09,546 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 9661 transitions. Word has length 47 [2021-03-10 23:15:09,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:09,546 INFO L480 AbstractCegarLoop]: Abstraction has 4838 states and 9661 transitions. [2021-03-10 23:15:09,546 INFO L481 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) [2021-03-10 23:15:09,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 9661 transitions. [2021-03-10 23:15:09,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:09,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:09,550 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:09,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:09,751 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:09,751 INFO L82 PathProgramCache]: Analyzing trace with hash 590250667, now seen corresponding path program 126 times [2021-03-10 23:15:09,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:09,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020022875] [2021-03-10 23:15:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:10,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020022875] [2021-03-10 23:15:10,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865827942] [2021-03-10 23:15:10,356 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 [2021-03-10 23:15:10,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:15:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:10,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:15:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:11,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:11,975 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 [2021-03-10 23:15:11,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:11,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:11,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:11,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:15:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:12,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:12,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:15:12,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038417687] [2021-03-10 23:15:12,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:12,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:12,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:12,021 INFO L87 Difference]: Start difference. First operand 4838 states and 9661 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) [2021-03-10 23:15:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:13,960 INFO L93 Difference]: Finished difference Result 8693 states and 17701 transitions. [2021-03-10 23:15:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:15:13,962 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 [2021-03-10 23:15:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:13,970 INFO L225 Difference]: With dead ends: 8693 [2021-03-10 23:15:13,970 INFO L226 Difference]: Without dead ends: 8556 [2021-03-10 23:15:13,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1821.3ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:13,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-03-10 23:15:14,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 4898. [2021-03-10 23:15:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 4897 states have (on average 1.9973453134572188) internal successors, (9781), 4897 states have internal predecessors, (9781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 9781 transitions. [2021-03-10 23:15:14,021 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 9781 transitions. Word has length 47 [2021-03-10 23:15:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:14,021 INFO L480 AbstractCegarLoop]: Abstraction has 4898 states and 9781 transitions. [2021-03-10 23:15:14,021 INFO L481 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) [2021-03-10 23:15:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 9781 transitions. [2021-03-10 23:15:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:14,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:14,024 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:14,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:14,225 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -533528613, now seen corresponding path program 127 times [2021-03-10 23:15:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:14,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794705437] [2021-03-10 23:15:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:14,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794705437] [2021-03-10 23:15:14,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616737455] [2021-03-10 23:15:14,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 23:15:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:14,803 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:15:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:16,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:16,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:16,325 INFO L244 Elim1Store]: Index analysis took 112 ms [2021-03-10 23:15:16,326 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 [2021-03-10 23:15:16,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:16,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:16,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:16,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:176, output treesize:7 [2021-03-10 23:15:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:16,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:16,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-03-10 23:15:16,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062559623] [2021-03-10 23:15:16,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:15:16,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:16,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:15:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:15:16,378 INFO L87 Difference]: Start difference. First operand 4898 states and 9781 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) [2021-03-10 23:15:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:17,884 INFO L93 Difference]: Finished difference Result 8775 states and 17704 transitions. [2021-03-10 23:15:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:15:17,886 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 [2021-03-10 23:15:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:17,894 INFO L225 Difference]: With dead ends: 8775 [2021-03-10 23:15:17,894 INFO L226 Difference]: Without dead ends: 8709 [2021-03-10 23:15:17,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1701.3ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:15:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8709 states. [2021-03-10 23:15:17,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8709 to 4865. [2021-03-10 23:15:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 1.9950657894736843) internal successors, (9704), 4864 states have internal predecessors, (9704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 9704 transitions. [2021-03-10 23:15:17,955 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 9704 transitions. Word has length 47 [2021-03-10 23:15:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:17,955 INFO L480 AbstractCegarLoop]: Abstraction has 4865 states and 9704 transitions. [2021-03-10 23:15:17,956 INFO L481 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) [2021-03-10 23:15:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 9704 transitions. [2021-03-10 23:15:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:17,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:17,960 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:18,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:18,160 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:18,160 INFO L82 PathProgramCache]: Analyzing trace with hash 499962331, now seen corresponding path program 128 times [2021-03-10 23:15:18,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:18,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382641919] [2021-03-10 23:15:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:18,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382641919] [2021-03-10 23:15:18,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219896018] [2021-03-10 23:15:18,754 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 [2021-03-10 23:15:18,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:15:18,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:18,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:15:18,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:20,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:20,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:20,453 INFO L244 Elim1Store]: Index analysis took 125 ms [2021-03-10 23:15:20,454 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 [2021-03-10 23:15:20,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:20,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:20,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:20,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:15:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:20,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:20,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:15:20,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830175197] [2021-03-10 23:15:20,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:20,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:20,491 INFO L87 Difference]: Start difference. First operand 4865 states and 9704 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) [2021-03-10 23:15:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:21,972 INFO L93 Difference]: Finished difference Result 8432 states and 17014 transitions. [2021-03-10 23:15:21,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:15:21,974 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 [2021-03-10 23:15:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:21,984 INFO L225 Difference]: With dead ends: 8432 [2021-03-10 23:15:21,985 INFO L226 Difference]: Without dead ends: 8374 [2021-03-10 23:15:21,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1854.4ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8374 states. [2021-03-10 23:15:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8374 to 4931. [2021-03-10 23:15:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4930 states have (on average 1.995131845841785) internal successors, (9836), 4930 states have internal predecessors, (9836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:22,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 9836 transitions. [2021-03-10 23:15:22,043 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 9836 transitions. Word has length 47 [2021-03-10 23:15:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:22,043 INFO L480 AbstractCegarLoop]: Abstraction has 4931 states and 9836 transitions. [2021-03-10 23:15:22,043 INFO L481 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) [2021-03-10 23:15:22,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 9836 transitions. [2021-03-10 23:15:22,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:22,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:22,047 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:22,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:22,248 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1480573845, now seen corresponding path program 129 times [2021-03-10 23:15:22,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:22,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809195890] [2021-03-10 23:15:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:22,956 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:22,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809195890] [2021-03-10 23:15:22,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647754321] [2021-03-10 23:15:22,957 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 [2021-03-10 23:15:22,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 23:15:22,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:22,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:15:22,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:24,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:24,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:24,857 INFO L244 Elim1Store]: Index analysis took 123 ms [2021-03-10 23:15:24,858 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 160 treesize of output 60 [2021-03-10 23:15:24,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:24,888 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:15:24,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:24,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-03-10 23:15:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:24,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:24,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:15:24,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388519630] [2021-03-10 23:15:24,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:24,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:24,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:24,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:24,920 INFO L87 Difference]: Start difference. First operand 4931 states and 9836 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) [2021-03-10 23:15:29,119 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-03-10 23:15:29,358 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-03-10 23:15:29,912 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2021-03-10 23:15:30,286 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2021-03-10 23:15:30,615 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-03-10 23:15:31,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:31,073 INFO L93 Difference]: Finished difference Result 8528 states and 17229 transitions. [2021-03-10 23:15:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:15:31,076 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 [2021-03-10 23:15:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:31,084 INFO L225 Difference]: With dead ends: 8528 [2021-03-10 23:15:31,084 INFO L226 Difference]: Without dead ends: 8098 [2021-03-10 23:15:31,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 4382.1ms TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:15:31,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8098 states. [2021-03-10 23:15:31,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8098 to 5018. [2021-03-10 23:15:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 1.9950169423958541) internal successors, (10009), 5017 states have internal predecessors, (10009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 10009 transitions. [2021-03-10 23:15:31,141 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 10009 transitions. Word has length 47 [2021-03-10 23:15:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:31,141 INFO L480 AbstractCegarLoop]: Abstraction has 5018 states and 10009 transitions. [2021-03-10 23:15:31,141 INFO L481 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) [2021-03-10 23:15:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 10009 transitions. [2021-03-10 23:15:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:31,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:31,145 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:31,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-10 23:15:31,346 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:31,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1502990453, now seen corresponding path program 130 times [2021-03-10 23:15:31,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:31,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169295992] [2021-03-10 23:15:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169295992] [2021-03-10 23:15:32,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015469787] [2021-03-10 23:15:32,214 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 [2021-03-10 23:15:32,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:15:32,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:32,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:15:32,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:34,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:34,196 INFO L244 Elim1Store]: Index analysis took 111 ms [2021-03-10 23:15:34,197 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 [2021-03-10 23:15:34,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:34,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:34,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:34,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:15:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:34,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:34,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:15:34,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545572422] [2021-03-10 23:15:34,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:34,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:34,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:34,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:34,239 INFO L87 Difference]: Start difference. First operand 5018 states and 10009 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) [2021-03-10 23:15:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:36,002 INFO L93 Difference]: Finished difference Result 10841 states and 22084 transitions. [2021-03-10 23:15:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:15:36,004 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 [2021-03-10 23:15:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:36,013 INFO L225 Difference]: With dead ends: 10841 [2021-03-10 23:15:36,013 INFO L226 Difference]: Without dead ends: 10658 [2021-03-10 23:15:36,014 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2351.3ms TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2021-03-10 23:15:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 4793. [2021-03-10 23:15:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4793 states, 4792 states have (on average 1.9995826377295491) internal successors, (9582), 4792 states have internal predecessors, (9582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 9582 transitions. [2021-03-10 23:15:36,082 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 9582 transitions. Word has length 47 [2021-03-10 23:15:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:36,082 INFO L480 AbstractCegarLoop]: Abstraction has 4793 states and 9582 transitions. [2021-03-10 23:15:36,082 INFO L481 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) [2021-03-10 23:15:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 9582 transitions. [2021-03-10 23:15:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:36,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:36,085 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:36,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-10 23:15:36,286 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:36,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:36,286 INFO L82 PathProgramCache]: Analyzing trace with hash -158396757, now seen corresponding path program 131 times [2021-03-10 23:15:36,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:36,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306448949] [2021-03-10 23:15:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:37,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306448949] [2021-03-10 23:15:37,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843942551] [2021-03-10 23:15:37,003 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 [2021-03-10 23:15:37,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 23:15:37,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:37,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 76 conjunts are in the unsatisfiable core [2021-03-10 23:15:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:38,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:38,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:38,793 INFO L244 Elim1Store]: Index analysis took 105 ms [2021-03-10 23:15:38,794 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 164 treesize of output 60 [2021-03-10 23:15:38,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:38,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:38,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:38,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-03-10 23:15:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:38,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:38,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-03-10 23:15:38,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19660955] [2021-03-10 23:15:38,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:15:38,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:38,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:15:38,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:15:38,836 INFO L87 Difference]: Start difference. First operand 4793 states and 9582 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) [2021-03-10 23:15:41,523 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-03-10 23:15:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:41,599 INFO L93 Difference]: Finished difference Result 5671 states and 11369 transitions. [2021-03-10 23:15:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:15:41,603 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 [2021-03-10 23:15:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:41,609 INFO L225 Difference]: With dead ends: 5671 [2021-03-10 23:15:41,609 INFO L226 Difference]: Without dead ends: 5636 [2021-03-10 23:15:41,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2687.6ms TimeCoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:15:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-03-10 23:15:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4169. [2021-03-10 23:15:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4169 states, 4168 states have (on average 2.001679462571977) internal successors, (8343), 4168 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4169 states to 4169 states and 8343 transitions. [2021-03-10 23:15:41,675 INFO L78 Accepts]: Start accepts. Automaton has 4169 states and 8343 transitions. Word has length 47 [2021-03-10 23:15:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:41,675 INFO L480 AbstractCegarLoop]: Abstraction has 4169 states and 8343 transitions. [2021-03-10 23:15:41,675 INFO L481 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) [2021-03-10 23:15:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4169 states and 8343 transitions. [2021-03-10 23:15:41,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:41,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:41,678 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:41,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-10 23:15:41,879 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1004048869, now seen corresponding path program 132 times [2021-03-10 23:15:41,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:41,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551075195] [2021-03-10 23:15:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:41,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:42,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551075195] [2021-03-10 23:15:42,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622762545] [2021-03-10 23:15:42,630 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 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 [2021-03-10 23:15:42,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:15:42,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:42,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:15:42,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:44,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:44,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:44,580 INFO L244 Elim1Store]: Index analysis took 135 ms [2021-03-10 23:15:44,581 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 [2021-03-10 23:15:44,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:44,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:44,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:44,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:15:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:44,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:44,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:15:44,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426571773] [2021-03-10 23:15:44,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:15:44,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:44,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:15:44,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:44,631 INFO L87 Difference]: Start difference. First operand 4169 states and 8343 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) [2021-03-10 23:15:46,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:46,693 INFO L93 Difference]: Finished difference Result 8665 states and 17702 transitions. [2021-03-10 23:15:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:15:46,695 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 [2021-03-10 23:15:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:46,704 INFO L225 Difference]: With dead ends: 8665 [2021-03-10 23:15:46,704 INFO L226 Difference]: Without dead ends: 8497 [2021-03-10 23:15:46,704 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 2188.6ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:15:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8497 states. [2021-03-10 23:15:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8497 to 4322. [2021-03-10 23:15:46,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4321 states have (on average 1.9956028697060866) internal successors, (8623), 4321 states have internal predecessors, (8623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:46,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 8623 transitions. [2021-03-10 23:15:46,761 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 8623 transitions. Word has length 47 [2021-03-10 23:15:46,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:46,761 INFO L480 AbstractCegarLoop]: Abstraction has 4322 states and 8623 transitions. [2021-03-10 23:15:46,761 INFO L481 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) [2021-03-10 23:15:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 8623 transitions. [2021-03-10 23:15:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:46,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:46,764 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:46,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:15:46,965 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash -248685093, now seen corresponding path program 133 times [2021-03-10 23:15:46,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:46,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746189307] [2021-03-10 23:15:46,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:47,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746189307] [2021-03-10 23:15:47,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896104018] [2021-03-10 23:15:47,630 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 [2021-03-10 23:15:47,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:47,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:15:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:49,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:49,622 INFO L244 Elim1Store]: Index analysis took 135 ms [2021-03-10 23:15:49,623 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 [2021-03-10 23:15:49,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:49,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:49,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:49,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:15:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:49,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:49,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-03-10 23:15:49,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592237516] [2021-03-10 23:15:49,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:15:49,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:15:49,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:15:49,670 INFO L87 Difference]: Start difference. First operand 4322 states and 8623 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) [2021-03-10 23:15:51,633 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-03-10 23:15:52,116 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-03-10 23:15:52,677 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-03-10 23:15:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:52,818 INFO L93 Difference]: Finished difference Result 5967 states and 11931 transitions. [2021-03-10 23:15:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:15:52,821 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 [2021-03-10 23:15:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:52,827 INFO L225 Difference]: With dead ends: 5967 [2021-03-10 23:15:52,827 INFO L226 Difference]: Without dead ends: 5569 [2021-03-10 23:15:52,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3067.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:15:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5569 states. [2021-03-10 23:15:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5569 to 4353. [2021-03-10 23:15:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 1.989889705882353) internal successors, (8660), 4352 states have internal predecessors, (8660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 8660 transitions. [2021-03-10 23:15:52,873 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 8660 transitions. Word has length 47 [2021-03-10 23:15:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:52,873 INFO L480 AbstractCegarLoop]: Abstraction has 4353 states and 8660 transitions. [2021-03-10 23:15:52,873 INFO L481 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) [2021-03-10 23:15:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 8660 transitions. [2021-03-10 23:15:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:52,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:52,876 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:15:53,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-03-10 23:15:53,076 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:15:53,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:15:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2127828149, now seen corresponding path program 134 times [2021-03-10 23:15:53,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:15:53,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286537882] [2021-03-10 23:15:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:15:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:15:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:54,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286537882] [2021-03-10 23:15:54,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181451330] [2021-03-10 23:15:54,125 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 [2021-03-10 23:15:54,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:15:54,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:15:54,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:15:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:15:56,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:15:56,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:15:56,777 INFO L244 Elim1Store]: Index analysis took 117 ms [2021-03-10 23:15:56,778 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 [2021-03-10 23:15:56,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:15:56,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:15:56,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:15:56,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:15:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:15:56,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:15:56,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-03-10 23:15:56,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050481225] [2021-03-10 23:15:56,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:15:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:15:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:15:56,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:15:56,854 INFO L87 Difference]: Start difference. First operand 4353 states and 8660 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) [2021-03-10 23:15:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:15:59,772 INFO L93 Difference]: Finished difference Result 9072 states and 18414 transitions. [2021-03-10 23:15:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:15:59,775 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 [2021-03-10 23:15:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:15:59,786 INFO L225 Difference]: With dead ends: 9072 [2021-03-10 23:15:59,786 INFO L226 Difference]: Without dead ends: 8933 [2021-03-10 23:15:59,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3087.6ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:15:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-03-10 23:15:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 3597. [2021-03-10 23:15:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3597 states, 3596 states have (on average 2.003058954393771) internal successors, (7203), 3596 states have internal predecessors, (7203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:15:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 7203 transitions. [2021-03-10 23:15:59,846 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 7203 transitions. Word has length 47 [2021-03-10 23:15:59,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:15:59,846 INFO L480 AbstractCegarLoop]: Abstraction has 3597 states and 7203 transitions. [2021-03-10 23:15:59,846 INFO L481 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) [2021-03-10 23:15:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 7203 transitions. [2021-03-10 23:15:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:15:59,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:15:59,849 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:00,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:00,050 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1094337205, now seen corresponding path program 135 times [2021-03-10 23:16:00,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:00,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960646708] [2021-03-10 23:16:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:01,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960646708] [2021-03-10 23:16:01,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071815679] [2021-03-10 23:16:01,337 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 [2021-03-10 23:16:01,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 23:16:01,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:01,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:16:01,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:04,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:04,612 INFO L244 Elim1Store]: Index analysis took 187 ms [2021-03-10 23:16:04,614 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 [2021-03-10 23:16:04,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:04,673 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:16:04,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:04,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-03-10 23:16:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:04,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:04,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:16:04,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625687011] [2021-03-10 23:16:04,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:16:04,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:04,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:16:04,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:16:04,734 INFO L87 Difference]: Start difference. First operand 3597 states and 7203 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) [2021-03-10 23:16:06,173 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-03-10 23:16:07,316 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2021-03-10 23:16:08,083 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-03-10 23:16:08,339 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-03-10 23:16:08,717 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:16:09,626 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-03-10 23:16:10,025 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-03-10 23:16:10,416 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-03-10 23:16:10,648 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-10 23:16:11,056 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-03-10 23:16:11,717 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-03-10 23:16:12,024 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2021-03-10 23:16:12,510 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2021-03-10 23:16:13,016 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-03-10 23:16:13,438 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-03-10 23:16:13,790 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-10 23:16:14,685 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-03-10 23:16:15,179 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-03-10 23:16:15,557 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-03-10 23:16:15,965 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2021-03-10 23:16:16,527 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2021-03-10 23:16:16,848 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 23:16:17,261 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2021-03-10 23:16:17,596 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-03-10 23:16:17,874 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-03-10 23:16:18,173 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-03-10 23:16:18,671 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 23:16:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:18,806 INFO L93 Difference]: Finished difference Result 8636 states and 17517 transitions. [2021-03-10 23:16:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:16:18,809 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 [2021-03-10 23:16:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:18,819 INFO L225 Difference]: With dead ends: 8636 [2021-03-10 23:16:18,819 INFO L226 Difference]: Without dead ends: 8034 [2021-03-10 23:16:18,819 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 10795.3ms TimeCoverageRelationStatistics Valid=355, Invalid=4201, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 23:16:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8034 states. [2021-03-10 23:16:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8034 to 3900. [2021-03-10 23:16:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.004360092331367) internal successors, (7815), 3899 states have internal predecessors, (7815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 7815 transitions. [2021-03-10 23:16:18,876 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 7815 transitions. Word has length 47 [2021-03-10 23:16:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:18,876 INFO L480 AbstractCegarLoop]: Abstraction has 3900 states and 7815 transitions. [2021-03-10 23:16:18,876 INFO L481 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) [2021-03-10 23:16:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 7815 transitions. [2021-03-10 23:16:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:16:18,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:18,880 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:19,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:19,080 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1220093915, now seen corresponding path program 136 times [2021-03-10 23:16:19,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:19,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231191498] [2021-03-10 23:16:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:20,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231191498] [2021-03-10 23:16:20,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865673933] [2021-03-10 23:16:20,461 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:20,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:16:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:20,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:16:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:23,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:23,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:23,644 INFO L244 Elim1Store]: Index analysis took 215 ms [2021-03-10 23:16:23,646 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 [2021-03-10 23:16:23,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:23,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:16:23,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:23,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:16:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:23,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:23,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:16:23,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954273565] [2021-03-10 23:16:23,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:16:23,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:23,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:16:23,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:16:23,750 INFO L87 Difference]: Start difference. First operand 3900 states and 7815 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) [2021-03-10 23:16:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:26,595 INFO L93 Difference]: Finished difference Result 7504 states and 15153 transitions. [2021-03-10 23:16:26,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:16:26,598 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 [2021-03-10 23:16:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:26,605 INFO L225 Difference]: With dead ends: 7504 [2021-03-10 23:16:26,605 INFO L226 Difference]: Without dead ends: 7474 [2021-03-10 23:16:26,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 3703.9ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:16:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2021-03-10 23:16:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 3941. [2021-03-10 23:16:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 2.00507614213198) internal successors, (7900), 3940 states have internal predecessors, (7900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 7900 transitions. [2021-03-10 23:16:26,644 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 7900 transitions. Word has length 47 [2021-03-10 23:16:26,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:26,644 INFO L480 AbstractCegarLoop]: Abstraction has 3941 states and 7900 transitions. [2021-03-10 23:16:26,644 INFO L481 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) [2021-03-10 23:16:26,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 7900 transitions. [2021-03-10 23:16:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:16:26,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:26,647 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:26,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:26,847 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:26,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:26,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1159154923, now seen corresponding path program 137 times [2021-03-10 23:16:26,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:26,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802628404] [2021-03-10 23:16:26,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:28,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802628404] [2021-03-10 23:16:28,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241208752] [2021-03-10 23:16:28,238 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:28,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:16:28,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:28,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-03-10 23:16:28,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:31,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:31,432 INFO L244 Elim1Store]: Index analysis took 168 ms [2021-03-10 23:16:31,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 48 [2021-03-10 23:16:31,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:31,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:16:31,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:31,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:124, output treesize:3 [2021-03-10 23:16:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:31,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:31,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-03-10 23:16:31,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779926050] [2021-03-10 23:16:31,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:16:31,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:31,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:16:31,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:16:31,562 INFO L87 Difference]: Start difference. First operand 3941 states and 7900 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:35,410 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-10 23:16:36,448 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 23:16:36,832 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-03-10 23:16:37,526 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-10 23:16:37,926 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-10 23:16:38,254 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-03-10 23:16:38,605 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2021-03-10 23:16:39,119 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-03-10 23:16:39,946 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-03-10 23:16:40,836 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 68 [2021-03-10 23:16:41,219 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2021-03-10 23:16:41,640 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 62 [2021-03-10 23:16:41,963 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2021-03-10 23:16:42,986 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 58 [2021-03-10 23:16:43,746 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2021-03-10 23:16:44,854 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 71 [2021-03-10 23:16:45,635 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-03-10 23:16:46,666 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 65 [2021-03-10 23:16:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:48,342 INFO L93 Difference]: Finished difference Result 9815 states and 19757 transitions. [2021-03-10 23:16:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:16:48,345 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:16:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:48,355 INFO L225 Difference]: With dead ends: 9815 [2021-03-10 23:16:48,355 INFO L226 Difference]: Without dead ends: 9187 [2021-03-10 23:16:48,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 11746.7ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-03-10 23:16:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-03-10 23:16:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 4094. [2021-03-10 23:16:48,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 1.9980454434400194) internal successors, (8178), 4093 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:48,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 8178 transitions. [2021-03-10 23:16:48,422 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 8178 transitions. Word has length 47 [2021-03-10 23:16:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:48,422 INFO L480 AbstractCegarLoop]: Abstraction has 4094 states and 8178 transitions. [2021-03-10 23:16:48,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:48,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 8178 transitions. [2021-03-10 23:16:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:16:48,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:48,425 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:48,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:48,626 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1068866587, now seen corresponding path program 138 times [2021-03-10 23:16:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:48,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532180772] [2021-03-10 23:16:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:16:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532180772] [2021-03-10 23:16:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006898411] [2021-03-10 23:16:50,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:50,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 23:16:50,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:16:50,254 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:16:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:16:53,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:16:53,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:16:53,790 INFO L244 Elim1Store]: Index analysis took 281 ms [2021-03-10 23:16:53,792 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 164 treesize of output 60 [2021-03-10 23:16:53,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:16:53,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:16:53,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:16:53,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-03-10 23:16:53,901 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:16:53,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:16:53,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:16:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492434774] [2021-03-10 23:16:53,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:16:53,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:16:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:16:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:16:53,902 INFO L87 Difference]: Start difference. First operand 4094 states and 8178 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:16:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:16:58,347 INFO L93 Difference]: Finished difference Result 8603 states and 17407 transitions. [2021-03-10 23:16:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:16:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:16:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:16:58,360 INFO L225 Difference]: With dead ends: 8603 [2021-03-10 23:16:58,360 INFO L226 Difference]: Without dead ends: 8533 [2021-03-10 23:16:58,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 4188.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:16:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8533 states. [2021-03-10 23:16:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8533 to 4058. [2021-03-10 23:16:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 1.9980280995809712) internal successors, (8106), 4057 states have internal predecessors, (8106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:16:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 8106 transitions. [2021-03-10 23:16:58,426 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 8106 transitions. Word has length 47 [2021-03-10 23:16:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:16:58,427 INFO L480 AbstractCegarLoop]: Abstraction has 4058 states and 8106 transitions. [2021-03-10 23:16:58,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:16:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 8106 transitions. [2021-03-10 23:16:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:16:58,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:16:58,430 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:16:58,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:16:58,631 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:16:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:16:58,631 INFO L82 PathProgramCache]: Analyzing trace with hash -911669589, now seen corresponding path program 139 times [2021-03-10 23:16:58,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:16:58,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610904026] [2021-03-10 23:16:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:16:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:00,159 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:00,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610904026] [2021-03-10 23:17:00,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711015626] [2021-03-10 23:17:00,160 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:00,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:17:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:03,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:03,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:04,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:04,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:04,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:04,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:04,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:04,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:04,240 INFO L244 Elim1Store]: Index analysis took 256 ms [2021-03-10 23:17:04,243 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 [2021-03-10 23:17:04,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:04,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:04,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:04,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:17:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:04,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:04,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:17:04,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360347883] [2021-03-10 23:17:04,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:17:04,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:17:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:04,354 INFO L87 Difference]: Start difference. First operand 4058 states and 8106 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:08,738 INFO L93 Difference]: Finished difference Result 8306 states and 16720 transitions. [2021-03-10 23:17:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:17:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:17:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:08,754 INFO L225 Difference]: With dead ends: 8306 [2021-03-10 23:17:08,754 INFO L226 Difference]: Without dead ends: 8276 [2021-03-10 23:17:08,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 4544.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:08,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-03-10 23:17:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 4043. [2021-03-10 23:17:08,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4043 states, 4042 states have (on average 1.9980207817911926) internal successors, (8076), 4042 states have internal predecessors, (8076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4043 states to 4043 states and 8076 transitions. [2021-03-10 23:17:08,816 INFO L78 Accepts]: Start accepts. Automaton has 4043 states and 8076 transitions. Word has length 47 [2021-03-10 23:17:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:08,816 INFO L480 AbstractCegarLoop]: Abstraction has 4043 states and 8076 transitions. [2021-03-10 23:17:08,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 4043 states and 8076 transitions. [2021-03-10 23:17:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:17:08,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:08,820 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:09,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-10 23:17:09,027 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash -850953189, now seen corresponding path program 140 times [2021-03-10 23:17:09,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:09,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358857128] [2021-03-10 23:17:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:10,446 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:17:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:10,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358857128] [2021-03-10 23:17:10,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43134359] [2021-03-10 23:17:10,643 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:10,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:17:10,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:10,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:17:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:13,493 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 23:17:13,793 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:17:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:14,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:14,422 INFO L244 Elim1Store]: Index analysis took 275 ms [2021-03-10 23:17:14,424 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 [2021-03-10 23:17:14,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:14,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:14,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:14,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:17:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:14,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:14,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-03-10 23:17:14,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365643187] [2021-03-10 23:17:14,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:17:14,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:14,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:17:14,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:17:14,534 INFO L87 Difference]: Start difference. First operand 4043 states and 8076 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2021-03-10 23:17:17,942 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-03-10 23:17:18,372 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-03-10 23:17:18,825 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2021-03-10 23:17:19,357 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-03-10 23:17:19,895 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-03-10 23:17:20,393 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-03-10 23:17:20,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:20,624 INFO L93 Difference]: Finished difference Result 5748 states and 11466 transitions. [2021-03-10 23:17:20,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:17:20,630 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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 [2021-03-10 23:17:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:20,636 INFO L225 Difference]: With dead ends: 5748 [2021-03-10 23:17:20,636 INFO L226 Difference]: Without dead ends: 5334 [2021-03-10 23:17:20,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 6103.9ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:17:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-03-10 23:17:20,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4216. [2021-03-10 23:17:20,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4216 states, 4215 states have (on average 1.9812574139976276) internal successors, (8351), 4215 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 8351 transitions. [2021-03-10 23:17:20,691 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 8351 transitions. Word has length 47 [2021-03-10 23:17:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:20,691 INFO L480 AbstractCegarLoop]: Abstraction has 4216 states and 8351 transitions. [2021-03-10 23:17:20,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2021-03-10 23:17:20,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 8351 transitions. [2021-03-10 23:17:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:17:20,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:20,695 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:20,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-10 23:17:20,895 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:20,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1696605301, now seen corresponding path program 141 times [2021-03-10 23:17:20,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:20,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868681728] [2021-03-10 23:17:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:22,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868681728] [2021-03-10 23:17:22,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965418381] [2021-03-10 23:17:22,704 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:22,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 23:17:22,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:22,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 76 conjunts are in the unsatisfiable core [2021-03-10 23:17:22,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:25,840 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:17:26,125 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:17:26,426 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:17:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:26,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:26,754 INFO L244 Elim1Store]: Index analysis took 255 ms [2021-03-10 23:17:26,756 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 164 treesize of output 60 [2021-03-10 23:17:26,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:26,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:26,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:26,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-03-10 23:17:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:26,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:26,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:17:26,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872241295] [2021-03-10 23:17:26,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:17:26,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:26,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:17:26,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:26,872 INFO L87 Difference]: Start difference. First operand 4216 states and 8351 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:29,459 INFO L93 Difference]: Finished difference Result 6821 states and 13741 transitions. [2021-03-10 23:17:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:17:29,464 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:17:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:29,472 INFO L225 Difference]: With dead ends: 6821 [2021-03-10 23:17:29,472 INFO L226 Difference]: Without dead ends: 6447 [2021-03-10 23:17:29,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 4909.6ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2021-03-10 23:17:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 4381. [2021-03-10 23:17:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 1.9794520547945205) internal successors, (8670), 4380 states have internal predecessors, (8670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 8670 transitions. [2021-03-10 23:17:29,532 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 8670 transitions. Word has length 47 [2021-03-10 23:17:29,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:29,533 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 8670 transitions. [2021-03-10 23:17:29,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 8670 transitions. [2021-03-10 23:17:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:17:29,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:29,537 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:29,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-10 23:17:29,737 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:29,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:29,737 INFO L82 PathProgramCache]: Analyzing trace with hash 617825819, now seen corresponding path program 142 times [2021-03-10 23:17:29,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:29,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475480417] [2021-03-10 23:17:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:31,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475480417] [2021-03-10 23:17:31,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262250870] [2021-03-10 23:17:31,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:31,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:17:31,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:31,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:17:31,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:35,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:35,661 INFO L244 Elim1Store]: Index analysis took 257 ms [2021-03-10 23:17:35,662 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 [2021-03-10 23:17:35,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:35,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:35,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:35,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:17:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:35,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:35,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:17:35,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214831746] [2021-03-10 23:17:35,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:17:35,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:17:35,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:35,734 INFO L87 Difference]: Start difference. First operand 4381 states and 8670 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:37,411 INFO L93 Difference]: Finished difference Result 5594 states and 11164 transitions. [2021-03-10 23:17:37,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:17:37,415 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:17:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:37,422 INFO L225 Difference]: With dead ends: 5594 [2021-03-10 23:17:37,422 INFO L226 Difference]: Without dead ends: 5571 [2021-03-10 23:17:37,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 4831.6ms TimeCoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2021-03-10 23:17:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 4381. [2021-03-10 23:17:37,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4381 states, 4380 states have (on average 1.9794520547945205) internal successors, (8670), 4380 states have internal predecessors, (8670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:37,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4381 states to 4381 states and 8670 transitions. [2021-03-10 23:17:37,473 INFO L78 Accepts]: Start accepts. Automaton has 4381 states and 8670 transitions. Word has length 47 [2021-03-10 23:17:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:37,474 INFO L480 AbstractCegarLoop]: Abstraction has 4381 states and 8670 transitions. [2021-03-10 23:17:37,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4381 states and 8670 transitions. [2021-03-10 23:17:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:17:37,477 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:37,477 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:37,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-10 23:17:37,679 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:37,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1819901717, now seen corresponding path program 143 times [2021-03-10 23:17:37,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:37,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476844667] [2021-03-10 23:17:37,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:39,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476844667] [2021-03-10 23:17:39,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547596889] [2021-03-10 23:17:39,508 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:39,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:17:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:39,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:17:39,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:43,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:43,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:43,511 INFO L244 Elim1Store]: Index analysis took 289 ms [2021-03-10 23:17:43,513 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 [2021-03-10 23:17:43,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:43,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:43,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:43,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:17:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:43,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:43,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:17:43,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448955521] [2021-03-10 23:17:43,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:17:43,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:43,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:17:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:43,626 INFO L87 Difference]: Start difference. First operand 4381 states and 8670 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:46,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:46,973 INFO L93 Difference]: Finished difference Result 6296 states and 12603 transitions. [2021-03-10 23:17:46,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:17:46,978 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:17:46,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:46,986 INFO L225 Difference]: With dead ends: 6296 [2021-03-10 23:17:46,986 INFO L226 Difference]: Without dead ends: 6251 [2021-03-10 23:17:46,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 4710.8ms TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:17:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-03-10 23:17:47,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 4402. [2021-03-10 23:17:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4402 states, 4401 states have (on average 1.9795501022494888) internal successors, (8712), 4401 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4402 states to 4402 states and 8712 transitions. [2021-03-10 23:17:47,046 INFO L78 Accepts]: Start accepts. Automaton has 4402 states and 8712 transitions. Word has length 47 [2021-03-10 23:17:47,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:47,047 INFO L480 AbstractCegarLoop]: Abstraction has 4402 states and 8712 transitions. [2021-03-10 23:17:47,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:17:47,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4402 states and 8712 transitions. [2021-03-10 23:17:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:17:47,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:47,050 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:47,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:47,251 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:47,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1521242571, now seen corresponding path program 144 times [2021-03-10 23:17:47,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:47,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584265166] [2021-03-10 23:17:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:17:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:17:48,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584265166] [2021-03-10 23:17:48,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737667118] [2021-03-10 23:17:48,453 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:17:48,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 23:17:48,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:17:48,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:17:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:17:50,005 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:17:52,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:17:52,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:17:52,316 INFO L244 Elim1Store]: Index analysis took 258 ms [2021-03-10 23:17:52,318 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 [2021-03-10 23:17:52,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:17:52,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:17:52,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:17:52,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:17:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:17:52,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:17:52,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 33 [2021-03-10 23:17:52,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889011321] [2021-03-10 23:17:52,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:17:52,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:17:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:17:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:17:52,431 INFO L87 Difference]: Start difference. First operand 4402 states and 8712 transitions. Second operand has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:55,389 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-03-10 23:17:55,789 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2021-03-10 23:17:56,213 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-03-10 23:17:56,540 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-03-10 23:17:57,099 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-03-10 23:17:57,466 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-03-10 23:17:58,131 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2021-03-10 23:17:58,685 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-03-10 23:17:59,103 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-03-10 23:17:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:17:59,497 INFO L93 Difference]: Finished difference Result 5735 states and 11394 transitions. [2021-03-10 23:17:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:17:59,503 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:17:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:17:59,508 INFO L225 Difference]: With dead ends: 5735 [2021-03-10 23:17:59,509 INFO L226 Difference]: Without dead ends: 5698 [2021-03-10 23:17:59,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 6396.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:17:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5698 states. [2021-03-10 23:17:59,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5698 to 4247. [2021-03-10 23:17:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4247 states, 4246 states have (on average 1.9762129062647198) internal successors, (8391), 4246 states have internal predecessors, (8391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4247 states to 4247 states and 8391 transitions. [2021-03-10 23:17:59,558 INFO L78 Accepts]: Start accepts. Automaton has 4247 states and 8391 transitions. Word has length 47 [2021-03-10 23:17:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:17:59,558 INFO L480 AbstractCegarLoop]: Abstraction has 4247 states and 8391 transitions. [2021-03-10 23:17:59,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:17:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4247 states and 8391 transitions. [2021-03-10 23:17:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:17:59,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:17:59,561 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:17:59,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-03-10 23:17:59,762 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:17:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:17:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 495186011, now seen corresponding path program 145 times [2021-03-10 23:17:59,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:17:59,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745785595] [2021-03-10 23:17:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:17:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:01,330 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:18:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:01,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745785595] [2021-03-10 23:18:01,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185691663] [2021-03-10 23:18:01,517 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:01,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:18:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:03,784 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:18:04,038 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:18:04,305 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:18:04,889 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:18:05,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:05,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:05,553 INFO L244 Elim1Store]: Index analysis took 288 ms [2021-03-10 23:18:05,556 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 [2021-03-10 23:18:05,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:18:05,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:18:05,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:18:05,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:18:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:05,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:05,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-03-10 23:18:05,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805284643] [2021-03-10 23:18:05,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:18:05,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:05,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:18:05,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:18:05,668 INFO L87 Difference]: Start difference. First operand 4247 states and 8391 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2021-03-10 23:18:07,640 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-03-10 23:18:08,021 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-03-10 23:18:08,391 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-03-10 23:18:08,796 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-03-10 23:18:09,221 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-03-10 23:18:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:09,366 INFO L93 Difference]: Finished difference Result 5627 states and 11181 transitions. [2021-03-10 23:18:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:18:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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 [2021-03-10 23:18:09,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:09,377 INFO L225 Difference]: With dead ends: 5627 [2021-03-10 23:18:09,377 INFO L226 Difference]: Without dead ends: 5254 [2021-03-10 23:18:09,378 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 6171.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:18:09,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2021-03-10 23:18:09,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 4210. [2021-03-10 23:18:09,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4209 states have (on average 1.9657875980042765) internal successors, (8274), 4209 states have internal predecessors, (8274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 8274 transitions. [2021-03-10 23:18:09,429 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 8274 transitions. Word has length 47 [2021-03-10 23:18:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:09,429 INFO L480 AbstractCegarLoop]: Abstraction has 4210 states and 8274 transitions. [2021-03-10 23:18:09,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2021-03-10 23:18:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 8274 transitions. [2021-03-10 23:18:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:18:09,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:09,432 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:09,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:09,633 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:09,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1207797195, now seen corresponding path program 146 times [2021-03-10 23:18:09,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:09,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935823085] [2021-03-10 23:18:09,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:18:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935823085] [2021-03-10 23:18:11,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946372432] [2021-03-10 23:18:11,202 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:18:11,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:18:11,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:11,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:18:11,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:14,373 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 23:18:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:15,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:15,303 INFO L244 Elim1Store]: Index analysis took 290 ms [2021-03-10 23:18:15,305 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 [2021-03-10 23:18:15,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:18:15,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:18:15,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:18:15,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:18:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 3 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:15,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:15,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-03-10 23:18:15,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841057170] [2021-03-10 23:18:15,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:18:15,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:18:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:18:15,453 INFO L87 Difference]: Start difference. First operand 4210 states and 8274 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:19,404 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-03-10 23:18:19,735 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-10 23:18:20,256 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-03-10 23:18:20,673 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2021-03-10 23:18:21,321 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-03-10 23:18:22,005 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2021-03-10 23:18:22,460 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 83 [2021-03-10 23:18:22,916 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2021-03-10 23:18:23,269 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2021-03-10 23:18:23,971 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 90 [2021-03-10 23:18:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:24,304 INFO L93 Difference]: Finished difference Result 6691 states and 13282 transitions. [2021-03-10 23:18:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:18:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:18:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:24,316 INFO L225 Difference]: With dead ends: 6691 [2021-03-10 23:18:24,316 INFO L226 Difference]: Without dead ends: 6269 [2021-03-10 23:18:24,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 7172.3ms TimeCoverageRelationStatistics Valid=194, Invalid=1786, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 23:18:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-03-10 23:18:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4633. [2021-03-10 23:18:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4632 states have (on average 1.9602763385146804) internal successors, (9080), 4632 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:24,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 9080 transitions. [2021-03-10 23:18:24,380 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 9080 transitions. Word has length 47 [2021-03-10 23:18:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:24,381 INFO L480 AbstractCegarLoop]: Abstraction has 4633 states and 9080 transitions. [2021-03-10 23:18:24,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 9080 transitions. [2021-03-10 23:18:24,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:18:24,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:24,385 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:24,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:24,585 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash 418166875, now seen corresponding path program 147 times [2021-03-10 23:18:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:24,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739548951] [2021-03-10 23:18:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:26,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739548951] [2021-03-10 23:18:26,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851245458] [2021-03-10 23:18:26,016 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:26,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 23:18:26,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:26,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:18:26,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:18:31,045 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 23:18:31,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:18:31,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:18:31,499 INFO L244 Elim1Store]: Index analysis took 346 ms [2021-03-10 23:18:31,502 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 [2021-03-10 23:18:31,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:18:31,588 INFO L628 ElimStorePlain]: treesize reduction 5, result has 80.0 percent of original size [2021-03-10 23:18:31,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:18:31,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-03-10 23:18:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:31,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:18:31,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-03-10 23:18:31,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401305208] [2021-03-10 23:18:31,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:18:31,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:18:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:18:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:18:31,686 INFO L87 Difference]: Start difference. First operand 4633 states and 9080 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) [2021-03-10 23:18:33,898 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-03-10 23:18:34,376 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 32 [2021-03-10 23:18:34,807 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-03-10 23:18:35,313 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-03-10 23:18:35,673 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 39 [2021-03-10 23:18:36,033 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-10 23:18:36,760 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-10 23:18:37,143 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-03-10 23:18:37,643 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-03-10 23:18:38,173 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:18:38,604 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 46 [2021-03-10 23:18:39,082 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 23:18:39,536 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-03-10 23:18:39,956 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2021-03-10 23:18:40,590 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-03-10 23:18:41,167 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2021-03-10 23:18:41,552 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-03-10 23:18:42,191 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-03-10 23:18:42,827 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-03-10 23:18:44,478 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-03-10 23:18:45,057 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-03-10 23:18:45,520 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-03-10 23:18:46,445 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-03-10 23:18:46,885 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-03-10 23:18:47,421 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 59 [2021-03-10 23:18:48,222 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 64 [2021-03-10 23:18:49,558 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2021-03-10 23:18:49,948 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-10 23:18:50,583 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2021-03-10 23:18:51,481 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-03-10 23:18:52,132 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-03-10 23:18:52,752 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-03-10 23:18:53,246 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-10 23:18:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:18:53,690 INFO L93 Difference]: Finished difference Result 9301 states and 18322 transitions. [2021-03-10 23:18:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:18:53,695 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 [2021-03-10 23:18:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:18:53,707 INFO L225 Difference]: With dead ends: 9301 [2021-03-10 23:18:53,708 INFO L226 Difference]: Without dead ends: 8773 [2021-03-10 23:18:53,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 15877.1ms TimeCoverageRelationStatistics Valid=350, Invalid=4480, Unknown=0, NotChecked=0, Total=4830 [2021-03-10 23:18:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-03-10 23:18:53,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 4964. [2021-03-10 23:18:53,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4964 states, 4963 states have (on average 1.9508361877896434) internal successors, (9682), 4963 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:18:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4964 states to 4964 states and 9682 transitions. [2021-03-10 23:18:53,786 INFO L78 Accepts]: Start accepts. Automaton has 4964 states and 9682 transitions. Word has length 47 [2021-03-10 23:18:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:18:53,787 INFO L480 AbstractCegarLoop]: Abstraction has 4964 states and 9682 transitions. [2021-03-10 23:18:53,787 INFO L481 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) [2021-03-10 23:18:53,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4964 states and 9682 transitions. [2021-03-10 23:18:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:18:53,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:18:53,791 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:18:53,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:53,992 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:18:53,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:18:53,992 INFO L82 PathProgramCache]: Analyzing trace with hash 762385499, now seen corresponding path program 148 times [2021-03-10 23:18:53,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:18:53,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094000188] [2021-03-10 23:18:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:18:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:18:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:18:56,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094000188] [2021-03-10 23:18:56,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020251156] [2021-03-10 23:18:56,207 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:18:56,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:18:56,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:18:56,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:18:56,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:00,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:00,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:00,676 INFO L244 Elim1Store]: Index analysis took 364 ms [2021-03-10 23:19:00,679 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 [2021-03-10 23:19:00,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:19:00,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:19:00,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:19:00,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:19:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:00,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:00,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:19:00,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215655617] [2021-03-10 23:19:00,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:19:00,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:19:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:19:00,833 INFO L87 Difference]: Start difference. First operand 4964 states and 9682 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:19:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:05,874 INFO L93 Difference]: Finished difference Result 7508 states and 15017 transitions. [2021-03-10 23:19:05,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:19:05,881 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:19:05,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:05,892 INFO L225 Difference]: With dead ends: 7508 [2021-03-10 23:19:05,892 INFO L226 Difference]: Without dead ends: 7383 [2021-03-10 23:19:05,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 5408.1ms TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:19:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7383 states. [2021-03-10 23:19:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7383 to 4988. [2021-03-10 23:19:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 1.9510727892520554) internal successors, (9730), 4987 states have internal predecessors, (9730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 9730 transitions. [2021-03-10 23:19:05,965 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 9730 transitions. Word has length 47 [2021-03-10 23:19:05,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:05,965 INFO L480 AbstractCegarLoop]: Abstraction has 4988 states and 9730 transitions. [2021-03-10 23:19:05,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:19:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 9730 transitions. [2021-03-10 23:19:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:19:05,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:05,970 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:06,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:06,171 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash 789635371, now seen corresponding path program 149 times [2021-03-10 23:19:06,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:06,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484937839] [2021-03-10 23:19:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:07,965 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:19:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:08,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484937839] [2021-03-10 23:19:08,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623134368] [2021-03-10 23:19:08,198 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:08,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 23:19:08,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:08,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 76 conjunts are in the unsatisfiable core [2021-03-10 23:19:08,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:10,435 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:19:10,741 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:19:11,052 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 23:19:11,356 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:19:12,136 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-10 23:19:12,504 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:19:12,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:12,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:13,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:13,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:13,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:13,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:13,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:13,247 INFO L244 Elim1Store]: Index analysis took 324 ms [2021-03-10 23:19:13,249 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 164 treesize of output 60 [2021-03-10 23:19:13,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:19:13,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:19:13,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:19:13,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:174, output treesize:7 [2021-03-10 23:19:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:13,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:13,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 34 [2021-03-10 23:19:13,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840680763] [2021-03-10 23:19:13,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-03-10 23:19:13,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:13,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-03-10 23:19:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:19:13,408 INFO L87 Difference]: Start difference. First operand 4988 states and 9730 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2021-03-10 23:19:16,484 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-03-10 23:19:16,901 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2021-03-10 23:19:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:17,160 INFO L93 Difference]: Finished difference Result 6692 states and 13174 transitions. [2021-03-10 23:19:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:19:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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 [2021-03-10 23:19:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:17,173 INFO L225 Difference]: With dead ends: 6692 [2021-03-10 23:19:17,173 INFO L226 Difference]: Without dead ends: 6396 [2021-03-10 23:19:17,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 6333.5ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:19:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2021-03-10 23:19:17,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 5273. [2021-03-10 23:19:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 5272 states have (on average 1.9493550834597875) internal successors, (10277), 5272 states have internal predecessors, (10277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 10277 transitions. [2021-03-10 23:19:17,238 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 10277 transitions. Word has length 47 [2021-03-10 23:19:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:17,238 INFO L480 AbstractCegarLoop]: Abstraction has 5273 states and 10277 transitions. [2021-03-10 23:19:17,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 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) [2021-03-10 23:19:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 10277 transitions. [2021-03-10 23:19:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:19:17,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:17,243 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:17,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:17,443 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1914195755, now seen corresponding path program 150 times [2021-03-10 23:19:17,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:17,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662912126] [2021-03-10 23:19:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:19,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662912126] [2021-03-10 23:19:19,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77616662] [2021-03-10 23:19:19,225 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:19,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 23:19:19,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:19,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:19:19,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:21,640 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 23:19:21,949 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:19:22,286 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:19:22,609 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:19:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:23,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:23,896 INFO L244 Elim1Store]: Index analysis took 375 ms [2021-03-10 23:19:23,899 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 [2021-03-10 23:19:23,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:19:23,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:19:23,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:19:23,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:19:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:24,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:24,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-03-10 23:19:24,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391979647] [2021-03-10 23:19:24,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:19:24,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:24,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:19:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:19:24,072 INFO L87 Difference]: Start difference. First operand 5273 states and 10277 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) [2021-03-10 23:19:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:28,477 INFO L93 Difference]: Finished difference Result 8503 states and 16847 transitions. [2021-03-10 23:19:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:19:28,483 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 [2021-03-10 23:19:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:28,495 INFO L225 Difference]: With dead ends: 8503 [2021-03-10 23:19:28,495 INFO L226 Difference]: Without dead ends: 8443 [2021-03-10 23:19:28,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 5251.9ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:19:28,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8443 states. [2021-03-10 23:19:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8443 to 5222. [2021-03-10 23:19:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 1.94771116644321) internal successors, (10169), 5221 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 10169 transitions. [2021-03-10 23:19:28,578 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 10169 transitions. Word has length 47 [2021-03-10 23:19:28,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:28,578 INFO L480 AbstractCegarLoop]: Abstraction has 5222 states and 10169 transitions. [2021-03-10 23:19:28,578 INFO L481 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) [2021-03-10 23:19:28,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 10169 transitions. [2021-03-10 23:19:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:19:28,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:28,583 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:28,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-03-10 23:19:28,784 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:28,784 INFO L82 PathProgramCache]: Analyzing trace with hash 284966187, now seen corresponding path program 151 times [2021-03-10 23:19:28,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:28,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516453382] [2021-03-10 23:19:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:28,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:30,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516453382] [2021-03-10 23:19:30,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642643162] [2021-03-10 23:19:30,974 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:30,998 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:19:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:33,597 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:19:33,900 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 23:19:34,210 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:19:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:35,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:35,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:35,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:35,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:35,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:36,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:36,001 INFO L244 Elim1Store]: Index analysis took 308 ms [2021-03-10 23:19:36,003 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 [2021-03-10 23:19:36,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:19:36,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:19:36,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:19:36,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:19:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:36,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:36,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-03-10 23:19:36,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594102244] [2021-03-10 23:19:36,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:19:36,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:36,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:19:36,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:19:36,116 INFO L87 Difference]: Start difference. First operand 5222 states and 10169 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) [2021-03-10 23:19:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:42,082 INFO L93 Difference]: Finished difference Result 8080 states and 16026 transitions. [2021-03-10 23:19:42,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:19:42,089 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 [2021-03-10 23:19:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:42,101 INFO L225 Difference]: With dead ends: 8080 [2021-03-10 23:19:42,101 INFO L226 Difference]: Without dead ends: 8012 [2021-03-10 23:19:42,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 5926.0ms TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:19:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8012 states. [2021-03-10 23:19:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8012 to 5264. [2021-03-10 23:19:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.9481284438533155) internal successors, (10253), 5263 states have internal predecessors, (10253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:42,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 10253 transitions. [2021-03-10 23:19:42,181 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 10253 transitions. Word has length 47 [2021-03-10 23:19:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:42,181 INFO L480 AbstractCegarLoop]: Abstraction has 5264 states and 10253 transitions. [2021-03-10 23:19:42,181 INFO L481 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) [2021-03-10 23:19:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 10253 transitions. [2021-03-10 23:19:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:19:42,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:42,186 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:42,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:42,387 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:42,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:42,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2036552917, now seen corresponding path program 152 times [2021-03-10 23:19:42,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:42,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790970658] [2021-03-10 23:19:42,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:44,900 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:44,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790970658] [2021-03-10 23:19:44,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239966804] [2021-03-10 23:19:44,901 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:44,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:19:44,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:44,926 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:19:44,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:19:46,981 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:19:47,299 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:19:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:49,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:49,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:49,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:49,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:50,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:19:50,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:19:50,051 INFO L244 Elim1Store]: Index analysis took 370 ms [2021-03-10 23:19:50,054 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 [2021-03-10 23:19:50,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:19:50,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:19:50,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:19:50,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:19:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:50,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:19:50,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:19:50,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265949295] [2021-03-10 23:19:50,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:19:50,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:19:50,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:19:50,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:19:50,226 INFO L87 Difference]: Start difference. First operand 5264 states and 10253 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:19:56,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:19:56,286 INFO L93 Difference]: Finished difference Result 7778 states and 15422 transitions. [2021-03-10 23:19:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:19:56,291 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:19:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:19:56,301 INFO L225 Difference]: With dead ends: 7778 [2021-03-10 23:19:56,301 INFO L226 Difference]: Without dead ends: 7718 [2021-03-10 23:19:56,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 6227.6ms TimeCoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:19:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2021-03-10 23:19:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 5264. [2021-03-10 23:19:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 1.9481284438533155) internal successors, (10253), 5263 states have internal predecessors, (10253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:19:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 10253 transitions. [2021-03-10 23:19:56,374 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 10253 transitions. Word has length 47 [2021-03-10 23:19:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:19:56,374 INFO L480 AbstractCegarLoop]: Abstraction has 5264 states and 10253 transitions. [2021-03-10 23:19:56,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:19:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 10253 transitions. [2021-03-10 23:19:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:19:56,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:19:56,378 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:19:56,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-10 23:19:56,579 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:19:56,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:19:56,579 INFO L82 PathProgramCache]: Analyzing trace with hash 991335067, now seen corresponding path program 153 times [2021-03-10 23:19:56,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:19:56,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376456000] [2021-03-10 23:19:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:19:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:19:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:19:59,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376456000] [2021-03-10 23:19:59,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586201124] [2021-03-10 23:19:59,068 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:19:59,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 23:19:59,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:19:59,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 74 conjunts are in the unsatisfiable core [2021-03-10 23:19:59,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:05,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:05,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:05,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:05,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:06,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:06,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:06,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:06,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:06,147 INFO L244 Elim1Store]: Index analysis took 406 ms [2021-03-10 23:20:06,150 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 160 treesize of output 60 [2021-03-10 23:20:06,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:20:06,254 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-03-10 23:20:06,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:20:06,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:180, output treesize:7 [2021-03-10 23:20:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:06,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:06,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2021-03-10 23:20:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168079840] [2021-03-10 23:20:06,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-03-10 23:20:06,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-03-10 23:20:06,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:20:06,379 INFO L87 Difference]: Start difference. First operand 5264 states and 10253 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:20:07,660 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-03-10 23:20:08,324 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 39 [2021-03-10 23:20:08,640 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-03-10 23:20:09,326 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-03-10 23:20:09,740 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-03-10 23:20:10,311 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-03-10 23:20:11,893 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 41 [2021-03-10 23:20:12,373 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-03-10 23:20:13,119 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-03-10 23:20:13,642 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2021-03-10 23:20:14,252 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-03-10 23:20:15,075 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-03-10 23:20:15,754 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-03-10 23:20:16,772 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83 [2021-03-10 23:20:17,527 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-03-10 23:20:18,328 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-03-10 23:20:19,362 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-03-10 23:20:20,057 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-03-10 23:20:21,147 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2021-03-10 23:20:21,935 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 81 [2021-03-10 23:20:23,442 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2021-03-10 23:20:24,436 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2021-03-10 23:20:25,540 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2021-03-10 23:20:26,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:20:26,836 INFO L93 Difference]: Finished difference Result 7750 states and 15363 transitions. [2021-03-10 23:20:26,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:20:26,843 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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 [2021-03-10 23:20:26,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:20:26,855 INFO L225 Difference]: With dead ends: 7750 [2021-03-10 23:20:26,855 INFO L226 Difference]: Without dead ends: 7320 [2021-03-10 23:20:26,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 17951.9ms TimeCoverageRelationStatistics Valid=326, Invalid=3456, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:20:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7320 states. [2021-03-10 23:20:26,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7320 to 5315. [2021-03-10 23:20:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 5314 states have (on average 1.9480617237485887) internal successors, (10352), 5314 states have internal predecessors, (10352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 10352 transitions. [2021-03-10 23:20:26,965 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 10352 transitions. Word has length 47 [2021-03-10 23:20:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:20:26,965 INFO L480 AbstractCegarLoop]: Abstraction has 5315 states and 10352 transitions. [2021-03-10 23:20:26,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 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) [2021-03-10 23:20:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 10352 transitions. [2021-03-10 23:20:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:20:26,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:20:26,971 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:20:27,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-03-10 23:20:27,172 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:20:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:20:27,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1427197253, now seen corresponding path program 154 times [2021-03-10 23:20:27,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:20:27,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888611005] [2021-03-10 23:20:27,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:20:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:29,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888611005] [2021-03-10 23:20:29,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671975934] [2021-03-10 23:20:29,755 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:20:29,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:20:29,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:20:29,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:20:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:31,464 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:20:31,882 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:20:32,269 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:20:32,668 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:20:33,007 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:20:35,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:35,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:35,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:35,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:35,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:35,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:35,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:35,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:35,628 INFO L244 Elim1Store]: Index analysis took 315 ms [2021-03-10 23:20:35,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-03-10 23:20:35,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:20:35,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:20:35,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:20:35,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:20:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:35,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:35,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-03-10 23:20:35,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679724916] [2021-03-10 23:20:35,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:20:35,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:35,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:20:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:20:35,787 INFO L87 Difference]: Start difference. First operand 5315 states and 10352 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:20:43,990 INFO L93 Difference]: Finished difference Result 11142 states and 22429 transitions. [2021-03-10 23:20:43,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:20:43,996 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:20:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:20:44,012 INFO L225 Difference]: With dead ends: 11142 [2021-03-10 23:20:44,013 INFO L226 Difference]: Without dead ends: 10920 [2021-03-10 23:20:44,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 6949.2ms TimeCoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:20:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10920 states. [2021-03-10 23:20:44,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10920 to 4910. [2021-03-10 23:20:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 4909 states have (on average 1.9454063964147483) internal successors, (9550), 4909 states have internal predecessors, (9550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 9550 transitions. [2021-03-10 23:20:44,116 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 9550 transitions. Word has length 47 [2021-03-10 23:20:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:20:44,116 INFO L480 AbstractCegarLoop]: Abstraction has 4910 states and 9550 transitions. [2021-03-10 23:20:44,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 9550 transitions. [2021-03-10 23:20:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:20:44,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:20:44,121 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:20:44,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-03-10 23:20:44,322 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:20:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:20:44,322 INFO L82 PathProgramCache]: Analyzing trace with hash 887233867, now seen corresponding path program 155 times [2021-03-10 23:20:44,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:20:44,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803201961] [2021-03-10 23:20:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:20:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:20:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:46,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803201961] [2021-03-10 23:20:46,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444765514] [2021-03-10 23:20:46,817 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:20:46,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 23:20:46,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:20:46,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:20:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:20:49,427 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:20:50,316 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:20:50,802 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:20:51,197 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:20:51,688 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:20:52,197 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 23:20:53,074 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:20:53,669 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:20:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:53,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:53,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:53,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:53,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:54,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:20:54,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:54,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:20:54,129 INFO L244 Elim1Store]: Index analysis took 381 ms [2021-03-10 23:20:54,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 48 [2021-03-10 23:20:54,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:20:54,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:20:54,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:20:54,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:126, output treesize:3 [2021-03-10 23:20:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:20:54,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:20:54,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-03-10 23:20:54,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208717461] [2021-03-10 23:20:54,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:20:54,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:20:54,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:20:54,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:20:54,391 INFO L87 Difference]: Start difference. First operand 4910 states and 9550 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:20:55,673 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-03-10 23:20:56,803 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:20:58,154 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:20:59,382 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 23:21:00,255 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-03-10 23:21:00,740 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:21:01,544 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-10 23:21:02,409 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:21:02,966 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-10 23:21:04,036 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 23:21:04,566 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 23:21:05,261 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 23:21:06,357 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-10 23:21:07,313 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-03-10 23:21:07,869 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-03-10 23:21:08,708 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 23:21:09,214 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:21:09,821 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-03-10 23:21:10,824 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-03-10 23:21:11,530 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-03-10 23:21:12,300 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-03-10 23:21:13,373 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-03-10 23:21:14,189 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-03-10 23:21:15,514 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-03-10 23:21:16,419 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-03-10 23:21:16,857 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 23:21:17,632 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2021-03-10 23:21:18,485 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-03-10 23:21:19,209 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-10 23:21:19,692 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:21:20,232 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 23:21:20,838 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 23:21:21,171 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2021-03-10 23:21:21,534 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:21:22,518 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-10 23:21:23,551 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-03-10 23:21:23,854 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:21:24,610 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-10 23:21:25,097 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:21:25,838 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2021-03-10 23:21:26,215 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:21:26,935 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-03-10 23:21:27,309 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:21:27,791 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:21:28,215 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 23:21:28,937 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:21:29,318 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:21:29,782 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:21:30,367 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-10 23:21:31,406 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-10 23:21:32,594 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-03-10 23:21:33,159 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:21:34,043 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:21:34,536 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:21:35,367 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:21:35,993 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:21:36,765 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:21:37,389 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-10 23:21:37,682 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-03-10 23:21:38,474 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 23:21:39,072 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:21:39,714 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-10 23:21:40,560 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-10 23:21:40,987 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:21:41,666 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 23:21:42,462 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-10 23:21:43,236 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 23:21:44,018 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-03-10 23:21:44,816 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-03-10 23:21:45,828 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-03-10 23:21:46,864 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-03-10 23:21:47,675 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-03-10 23:21:48,894 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-03-10 23:21:49,620 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 23:21:50,505 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-03-10 23:21:51,398 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:21:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:21:51,498 INFO L93 Difference]: Finished difference Result 11866 states and 23502 transitions. [2021-03-10 23:21:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-03-10 23:21:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:21:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:21:51,522 INFO L225 Difference]: With dead ends: 11866 [2021-03-10 23:21:51,522 INFO L226 Difference]: Without dead ends: 10887 [2021-03-10 23:21:51,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3608 ImplicationChecksByTransitivity, 47295.9ms TimeCoverageRelationStatistics Valid=892, Invalid=13870, Unknown=0, NotChecked=0, Total=14762 [2021-03-10 23:21:51,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10887 states. [2021-03-10 23:21:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10887 to 5297. [2021-03-10 23:21:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5297 states, 5296 states have (on average 1.966012084592145) internal successors, (10412), 5296 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5297 states to 5297 states and 10412 transitions. [2021-03-10 23:21:51,639 INFO L78 Accepts]: Start accepts. Automaton has 5297 states and 10412 transitions. Word has length 47 [2021-03-10 23:21:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:21:51,639 INFO L480 AbstractCegarLoop]: Abstraction has 5297 states and 10412 transitions. [2021-03-10 23:21:51,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:21:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5297 states and 10412 transitions. [2021-03-10 23:21:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:21:51,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:21:51,644 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:21:51,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:21:51,845 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:21:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:21:51,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1550493669, now seen corresponding path program 156 times [2021-03-10 23:21:51,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:21:51,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940279665] [2021-03-10 23:21:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:21:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:21:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:21:54,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940279665] [2021-03-10 23:21:54,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47875140] [2021-03-10 23:21:54,560 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:21:54,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 23:21:54,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:21:54,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:21:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:21:56,713 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:21:57,048 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:21:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:21:59,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:21:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:21:59,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:21:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:21:59,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:21:59,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:21:59,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:21:59,888 INFO L244 Elim1Store]: Index analysis took 269 ms [2021-03-10 23:21:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-03-10 23:21:59,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:21:59,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:21:59,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:21:59,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:22:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:00,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:22:00,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-03-10 23:22:00,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573672587] [2021-03-10 23:22:00,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:22:00,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:22:00,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:22:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:22:00,068 INFO L87 Difference]: Start difference. First operand 5297 states and 10412 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:10,423 INFO L93 Difference]: Finished difference Result 9752 states and 19414 transitions. [2021-03-10 23:22:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:22:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:22:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:10,443 INFO L225 Difference]: With dead ends: 9752 [2021-03-10 23:22:10,443 INFO L226 Difference]: Without dead ends: 9685 [2021-03-10 23:22:10,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 6750.3ms TimeCoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:22:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9685 states. [2021-03-10 23:22:10,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9685 to 5309. [2021-03-10 23:22:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5309 states, 5308 states have (on average 1.9638281838733986) internal successors, (10424), 5308 states have internal predecessors, (10424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:10,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 10424 transitions. [2021-03-10 23:22:10,539 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 10424 transitions. Word has length 47 [2021-03-10 23:22:10,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:10,539 INFO L480 AbstractCegarLoop]: Abstraction has 5309 states and 10424 transitions. [2021-03-10 23:22:10,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:10,539 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 10424 transitions. [2021-03-10 23:22:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:22:10,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:10,544 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:10,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-03-10 23:22:10,745 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:10,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:10,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1031793547, now seen corresponding path program 157 times [2021-03-10 23:22:10,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:10,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096492922] [2021-03-10 23:22:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:12,249 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:13,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096492922] [2021-03-10 23:22:13,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027237464] [2021-03-10 23:22:13,826 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:13,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:22:13,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:22:15,226 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:15,563 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:22:15,898 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-10 23:22:16,288 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:22:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:19,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:19,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:19,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:19,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:19,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:19,510 INFO L244 Elim1Store]: Index analysis took 429 ms [2021-03-10 23:22:19,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-03-10 23:22:19,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:22:19,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:22:19,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:22:19,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:22:19,718 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:19,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:22:19,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-03-10 23:22:19,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656927803] [2021-03-10 23:22:19,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:22:19,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:22:19,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:22:19,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:22:19,719 INFO L87 Difference]: Start difference. First operand 5309 states and 10424 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:31,629 INFO L93 Difference]: Finished difference Result 9826 states and 19730 transitions. [2021-03-10 23:22:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:22:31,638 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:22:31,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:31,655 INFO L225 Difference]: With dead ends: 9826 [2021-03-10 23:22:31,655 INFO L226 Difference]: Without dead ends: 9688 [2021-03-10 23:22:31,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 7168.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:22:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9688 states. [2021-03-10 23:22:31,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9688 to 5303. [2021-03-10 23:22:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5303 states, 5302 states have (on average 1.963787250094304) internal successors, (10412), 5302 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5303 states to 5303 states and 10412 transitions. [2021-03-10 23:22:31,756 INFO L78 Accepts]: Start accepts. Automaton has 5303 states and 10412 transitions. Word has length 47 [2021-03-10 23:22:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:31,756 INFO L480 AbstractCegarLoop]: Abstraction has 5303 states and 10412 transitions. [2021-03-10 23:22:31,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5303 states and 10412 transitions. [2021-03-10 23:22:31,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:22:31,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:31,760 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:31,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:31,961 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:31,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:31,961 INFO L82 PathProgramCache]: Analyzing trace with hash 554374235, now seen corresponding path program 158 times [2021-03-10 23:22:31,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:31,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059149751] [2021-03-10 23:22:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:32,906 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:22:33,111 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:33,343 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:22:33,539 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:34,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059149751] [2021-03-10 23:22:34,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578035300] [2021-03-10 23:22:34,913 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:34,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:22:34,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:22:34,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:22:34,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:22:36,421 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:22:36,734 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:37,063 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:22:37,413 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:22:37,750 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:22:38,105 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:22:38,469 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-10 23:22:40,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:40,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:40,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:40,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:41,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:41,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:22:41,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:22:41,134 INFO L244 Elim1Store]: Index analysis took 431 ms [2021-03-10 23:22:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-03-10 23:22:41,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:22:41,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:22:41,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:22:41,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:22:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:41,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:22:41,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-03-10 23:22:41,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899814858] [2021-03-10 23:22:41,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-03-10 23:22:41,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:22:41,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-03-10 23:22:41,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:22:41,363 INFO L87 Difference]: Start difference. First operand 5303 states and 10412 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:22:51,342 INFO L93 Difference]: Finished difference Result 9600 states and 19128 transitions. [2021-03-10 23:22:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:22:51,350 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:22:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:22:51,367 INFO L225 Difference]: With dead ends: 9600 [2021-03-10 23:22:51,367 INFO L226 Difference]: Without dead ends: 9531 [2021-03-10 23:22:51,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 7520.0ms TimeCoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:22:51,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9531 states. [2021-03-10 23:22:51,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9531 to 5243. [2021-03-10 23:22:51,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5243 states, 5242 states have (on average 1.9626096909576498) internal successors, (10288), 5242 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:51,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5243 states to 5243 states and 10288 transitions. [2021-03-10 23:22:51,455 INFO L78 Accepts]: Start accepts. Automaton has 5243 states and 10288 transitions. Word has length 47 [2021-03-10 23:22:51,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:22:51,455 INFO L480 AbstractCegarLoop]: Abstraction has 5243 states and 10288 transitions. [2021-03-10 23:22:51,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:22:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 5243 states and 10288 transitions. [2021-03-10 23:22:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:22:51,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:22:51,459 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:22:51,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:51,659 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:22:51,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:22:51,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1767144869, now seen corresponding path program 159 times [2021-03-10 23:22:51,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:22:51,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971649927] [2021-03-10 23:22:51,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:22:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:22:52,600 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:22:52,813 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:53,056 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:22:53,280 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:53,515 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:22:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:22:55,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971649927] [2021-03-10 23:22:55,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260407842] [2021-03-10 23:22:55,040 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:22:55,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 23:22:55,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:22:55,073 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:22:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:22:56,939 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:22:57,285 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:22:57,647 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:22:57,995 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:23:01,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:01,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:01,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:01,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:01,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:01,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:01,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:01,539 INFO L244 Elim1Store]: Index analysis took 480 ms [2021-03-10 23:23:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-03-10 23:23:01,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:23:01,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:23:01,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:23:01,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:23:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:01,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:01,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-03-10 23:23:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823736521] [2021-03-10 23:23:01,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:23:01,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:23:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:23:01,763 INFO L87 Difference]: Start difference. First operand 5243 states and 10288 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:23:10,689 INFO L93 Difference]: Finished difference Result 9459 states and 18898 transitions. [2021-03-10 23:23:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:23:10,698 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:23:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:23:10,714 INFO L225 Difference]: With dead ends: 9459 [2021-03-10 23:23:10,714 INFO L226 Difference]: Without dead ends: 9043 [2021-03-10 23:23:10,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 8078.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:23:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9043 states. [2021-03-10 23:23:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9043 to 5324. [2021-03-10 23:23:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5324 states, 5323 states have (on average 1.9631786586511366) internal successors, (10450), 5323 states have internal predecessors, (10450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5324 states to 5324 states and 10450 transitions. [2021-03-10 23:23:10,814 INFO L78 Accepts]: Start accepts. Automaton has 5324 states and 10450 transitions. Word has length 47 [2021-03-10 23:23:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:23:10,814 INFO L480 AbstractCegarLoop]: Abstraction has 5324 states and 10450 transitions. [2021-03-10 23:23:10,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 5324 states and 10450 transitions. [2021-03-10 23:23:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:23:10,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:23:10,820 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:23:11,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:11,021 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:23:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:23:11,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1260743115, now seen corresponding path program 160 times [2021-03-10 23:23:11,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:23:11,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839823386] [2021-03-10 23:23:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:23:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:23:11,966 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:23:12,187 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:23:12,422 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:23:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:14,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839823386] [2021-03-10 23:23:14,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474486188] [2021-03-10 23:23:14,053 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:14,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:23:14,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:23:14,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:23:14,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:23:15,668 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:23:16,040 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:23:16,408 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-10 23:23:16,792 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:23:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:20,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:20,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:20,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:20,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:20,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:20,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:20,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:20,726 INFO L244 Elim1Store]: Index analysis took 455 ms [2021-03-10 23:23:20,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-03-10 23:23:20,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:23:20,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:23:20,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:23:20,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:23:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:20,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:20,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-03-10 23:23:20,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068134572] [2021-03-10 23:23:20,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-03-10 23:23:20,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:20,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-03-10 23:23:20,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:23:20,974 INFO L87 Difference]: Start difference. First operand 5324 states and 10450 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:23:29,406 INFO L93 Difference]: Finished difference Result 9096 states and 18133 transitions. [2021-03-10 23:23:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:23:29,416 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-03-10 23:23:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:23:29,432 INFO L225 Difference]: With dead ends: 9096 [2021-03-10 23:23:29,432 INFO L226 Difference]: Without dead ends: 9026 [2021-03-10 23:23:29,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 7912.8ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 23:23:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9026 states. [2021-03-10 23:23:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9026 to 5327. [2021-03-10 23:23:29,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5327 states, 5326 states have (on average 1.963199399173864) internal successors, (10456), 5326 states have internal predecessors, (10456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5327 states to 5327 states and 10456 transitions. [2021-03-10 23:23:29,536 INFO L78 Accepts]: Start accepts. Automaton has 5327 states and 10456 transitions. Word has length 47 [2021-03-10 23:23:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:23:29,536 INFO L480 AbstractCegarLoop]: Abstraction has 5327 states and 10456 transitions. [2021-03-10 23:23:29,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 36 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5327 states and 10456 transitions. [2021-03-10 23:23:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:23:29,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:23:29,543 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:23:29,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:29,743 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:23:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:23:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 565828267, now seen corresponding path program 161 times [2021-03-10 23:23:29,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:23:29,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974454781] [2021-03-10 23:23:29,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:23:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:23:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974454781] [2021-03-10 23:23:32,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877158213] [2021-03-10 23:23:32,791 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:23:32,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 23:23:32,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:23:32,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 75 conjunts are in the unsatisfiable core [2021-03-10 23:23:32,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:23:36,356 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:23:36,873 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:23:37,495 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:23:38,205 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:23:38,877 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-10 23:23:39,565 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:23:40,328 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 23:23:41,205 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:23:42,254 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:23:43,163 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-10 23:23:43,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:23:43,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:23:43,886 INFO L244 Elim1Store]: Index analysis took 597 ms [2021-03-10 23:23:43,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 36 disjoint index pairs (out of 153 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 48 [2021-03-10 23:23:43,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:23:43,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:23:43,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:23:43,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:126, output treesize:3 [2021-03-10 23:23:44,289 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:23:44,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:23:44,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2021-03-10 23:23:44,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470828234] [2021-03-10 23:23:44,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-03-10 23:23:44,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:23:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-03-10 23:23:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1519, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:23:44,291 INFO L87 Difference]: Start difference. First operand 5327 states and 10456 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:23:47,684 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-10 23:23:48,364 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-03-10 23:23:49,034 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:23:49,979 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-10 23:23:51,425 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:23:52,422 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 23:23:53,912 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:23:54,651 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-03-10 23:23:56,059 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-10 23:23:56,451 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:23:57,108 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-10 23:23:58,128 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 23:23:59,458 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-10 23:24:00,183 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 23:24:01,024 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-03-10 23:24:02,254 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:24:03,925 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-03-10 23:24:05,294 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-10 23:24:06,046 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2021-03-10 23:24:06,961 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:24:08,187 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 23:24:08,984 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2021-03-10 23:24:10,999 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-10 23:24:11,944 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-03-10 23:24:12,811 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-10 23:24:14,146 WARN L205 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-03-10 23:24:15,528 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-03-10 23:24:16,865 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-03-10 23:24:18,006 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2021-03-10 23:24:19,220 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 23:24:20,480 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-10 23:24:21,422 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2021-03-10 23:24:22,553 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2021-03-10 23:24:24,340 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-03-10 23:24:25,560 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2021-03-10 23:24:26,836 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 79 [2021-03-10 23:24:27,392 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-10 23:24:28,509 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-03-10 23:24:29,492 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-03-10 23:24:30,166 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 23:24:31,229 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-03-10 23:24:32,445 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2021-03-10 23:24:33,541 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-10 23:24:34,030 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:24:34,821 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:24:35,554 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 23:24:36,356 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2021-03-10 23:24:36,837 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 23:24:37,169 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-10 23:24:38,365 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2021-03-10 23:24:38,970 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:24:40,132 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-03-10 23:24:40,529 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-10 23:24:41,598 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-03-10 23:24:42,674 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-10 23:24:43,850 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-03-10 23:24:44,434 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:24:45,556 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-03-10 23:24:46,100 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 23:24:46,843 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:24:47,578 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-10 23:24:48,208 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:24:48,806 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 23:24:49,188 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-10 23:24:50,095 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-10 23:24:50,731 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:24:51,845 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-10 23:24:52,890 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2021-03-10 23:24:53,640 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 23:24:54,086 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 23:24:55,334 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-10 23:24:56,038 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-10 23:24:56,824 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:24:57,324 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-10 23:24:58,261 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 23:24:58,947 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:25:01,018 WARN L205 SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-03-10 23:25:02,096 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-10 23:25:03,700 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-03-10 23:25:04,548 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-03-10 23:25:04,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:25:04,667 INFO L93 Difference]: Finished difference Result 10668 states and 21165 transitions. [2021-03-10 23:25:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-03-10 23:25:04,677 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-03-10 23:25:04,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:25:04,693 INFO L225 Difference]: With dead ends: 10668 [2021-03-10 23:25:04,693 INFO L226 Difference]: Without dead ends: 9767 [2021-03-10 23:25:04,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3745 ImplicationChecksByTransitivity, 67125.6ms TimeCoverageRelationStatistics Valid=923, Invalid=14329, Unknown=0, NotChecked=0, Total=15252 [2021-03-10 23:25:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-03-10 23:25:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 5879. [2021-03-10 23:25:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5879 states, 5878 states have (on average 1.9911534535556312) internal successors, (11704), 5878 states have internal predecessors, (11704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:25:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5879 states to 5879 states and 11704 transitions. [2021-03-10 23:25:04,811 INFO L78 Accepts]: Start accepts. Automaton has 5879 states and 11704 transitions. Word has length 47 [2021-03-10 23:25:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:25:04,811 INFO L480 AbstractCegarLoop]: Abstraction has 5879 states and 11704 transitions. [2021-03-10 23:25:04,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:25:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5879 states and 11704 transitions. [2021-03-10 23:25:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-03-10 23:25:04,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:25:04,817 INFO L519 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:25:05,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-03-10 23:25:05,018 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:25:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:25:05,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1679336475, now seen corresponding path program 162 times [2021-03-10 23:25:05,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:25:05,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082693411] [2021-03-10 23:25:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:25:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:25:05,545 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:25:06,038 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:25:06,254 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:25:06,479 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:25:06,698 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:25:06,943 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:25:07,975 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-03-10 23:25:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:25:08,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082693411] [2021-03-10 23:25:08,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119126557] [2021-03-10 23:25:08,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:25:08,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 23:25:08,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:25:08,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 73 conjunts are in the unsatisfiable core [2021-03-10 23:25:08,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:25:09,555 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:25:09,944 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:25:10,337 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:25:10,748 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:25:11,148 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:25:11,576 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-10 23:25:12,020 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-10 23:25:12,476 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:25:13,008 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:25:13,537 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 23:25:14,115 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 23:25:14,768 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:25:15,450 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-10 23:25:15,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:25:15,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:25:15,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:25:15,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:25:15,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:25:16,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:25:16,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:25:16,089 INFO L244 Elim1Store]: Index analysis took 524 ms [2021-03-10 23:25:16,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 36 disjoint index pairs (out of 105 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 60 [2021-03-10 23:25:16,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:25:16,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:25:16,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:25:16,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:168, output treesize:7 [2021-03-10 23:25:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:25:16,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:25:16,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 32 [2021-03-10 23:25:16,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805309384] [2021-03-10 23:25:16,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-03-10 23:25:16,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:25:16,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-03-10 23:25:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 23:25:16,378 INFO L87 Difference]: Start difference. First operand 5879 states and 11704 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-03-10 23:25:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 23:25:21,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-03-10 23:25:21,670 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:25:21,675 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:25:21,676 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:25:21 BasicIcfg [2021-03-10 23:25:21,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:25:21,677 INFO L168 Benchmark]: Toolchain (without parser) took 847527.51 ms. Allocated memory was 339.7 MB in the beginning and 589.3 MB in the end (delta: 249.6 MB). Free memory was 320.1 MB in the beginning and 293.3 MB in the end (delta: 26.8 MB). Peak memory consumption was 277.8 MB. Max. memory is 16.0 GB. [2021-03-10 23:25:21,677 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.75 ms. Allocated memory is still 339.7 MB. Free memory was 321.3 MB in the beginning and 321.2 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:25:21,677 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.46 ms. Allocated memory is still 339.7 MB. Free memory was 319.6 MB in the beginning and 318.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:25:21,677 INFO L168 Benchmark]: Boogie Preprocessor took 15.42 ms. Allocated memory is still 339.7 MB. Free memory was 318.2 MB in the beginning and 317.2 MB in the end (delta: 960.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:25:21,677 INFO L168 Benchmark]: RCFGBuilder took 319.08 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 305.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:25:21,677 INFO L168 Benchmark]: TraceAbstraction took 847155.13 ms. Allocated memory was 339.7 MB in the beginning and 589.3 MB in the end (delta: 249.6 MB). Free memory was 304.8 MB in the beginning and 293.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 263.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:25:21,677 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 0.75 ms. Allocated memory is still 339.7 MB. Free memory was 321.3 MB in the beginning and 321.2 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.46 ms. Allocated memory is still 339.7 MB. Free memory was 319.6 MB in the beginning and 318.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.42 ms. Allocated memory is still 339.7 MB. Free memory was 318.2 MB in the beginning and 317.2 MB in the end (delta: 960.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 319.08 ms. Allocated memory is still 339.7 MB. Free memory was 317.2 MB in the beginning and 305.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 847155.13 ms. Allocated memory was 339.7 MB in the beginning and 589.3 MB in the end (delta: 249.6 MB). Free memory was 304.8 MB in the beginning and 293.3 MB in the end (delta: 11.5 MB). Peak memory consumption was 263.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 60). Cancelled while BasicCegarLoop was constructing difference of abstraction (5879states) and FLOYD_HOARE automaton (currently 22 states, 33 states before enhancement),while ReachableStatesComputation was computing reachable states (482 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 846989.6ms, OverallIterations: 168, TraceHistogramMax: 9, EmptinessCheckTime: 347.0ms, AutomataDifference: 457554.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 35.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13548 SDtfs, 23739 SDslu, 203023 SDs, 0 SdLazy, 116533 SolverSat, 3974 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 144821.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9654 GetRequests, 4345 SyntacticMatches, 518 SemanticMatches, 4791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42190 ImplicationChecksByTransitivity, 435310.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5879occurred in iteration=167, InterpolantAutomatonStates: 4315, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5018.7ms AutomataMinimizationTime, 167 MinimizatonAttempts, 235955 StatesRemovedByMinimization, 165 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 635.4ms SsaConstructionTime, 2854.9ms SatisfiabilityAnalysisTime, 343950.7ms InterpolantComputationTime, 12814 NumberOfCodeBlocks, 12814 NumberOfCodeBlocksAsserted, 857 NumberOfCheckSat, 12482 ConstructedInterpolants, 738 QuantifiedInterpolants, 443816 SizeOfPredicates, 192 NumberOfNonLiveVariables, 16365 ConjunctsInSsa, 9133 ConjunctsInUnsatCore, 332 InterpolantComputations, 4 PerfectInterpolantSequences, 593/30015 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown