/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-more/dec-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:44:02,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:44:02,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:44:02,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:44:02,209 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 [2021-06-05 23:44:02,231 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:44:02,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:44:02,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:44:02,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:44:02,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:44:02,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:44:02,234 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:44:02,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:44:02,234 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:44:02,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:44:02,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:44:02,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:44:02,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:44:02,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:44:02,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:44:02,235 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:44:02,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:44:02,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:44:02,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:44:02,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:44:02,237 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:44:02,237 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:44:02,237 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:44:02,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:44:02,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:44:02,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:44:02,502 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:44:02,503 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:44:02,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2021-06-05 23:44:02,503 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2021-06-05 23:44:02,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:44:02,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:44:02,531 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:44:02,531 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:44:02,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:44:02,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:44:02,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:44:02,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:44:02,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:44:02,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... [2021-06-05 23:44:02,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:44:02,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:44:02,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:44:02,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:44:02,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:44:02,616 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:44:02,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:44:02,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:44:02,617 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:44:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:44:02,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:44:02,617 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:44:02,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:44:02,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:44:02,618 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:44:02,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:44:02,846 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:44:02,847 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:44:02 BoogieIcfgContainer [2021-06-05 23:44:02,847 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:44:02,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:44:02,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:44:02,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:44:02,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:44:02" (1/2) ... [2021-06-05 23:44:02,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22607b4a and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:44:02, skipping insertion in model container [2021-06-05 23:44:02,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:44:02" (2/2) ... [2021-06-05 23:44:02,852 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2021-06-05 23:44:02,856 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:44:02,856 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:44:02,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:44:02,873 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:44:02,909 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 23:44:02,925 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 23:44:02,956 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:44:02,956 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:44:02,956 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:44:02,957 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:44:02,957 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:44:02,957 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:44:02,957 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:44:02,957 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:44:02,968 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2021-06-05 23:44:02,981 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 23:44:02,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:02,989 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:02,990 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:02,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:02,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1034289359, now seen corresponding path program 1 times [2021-06-05 23:44:02,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:03,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748198080] [2021-06-05 23:44:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:03,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:03,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748198080] [2021-06-05 23:44:03,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748198080] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:44:03,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:44:03,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:44:03,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743200612] [2021-06-05 23:44:03,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:44:03,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:03,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:44:03,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:44:03,112 INFO L87 Difference]: Start difference. First operand has 65 states, 63 states have (on average 2.015873015873016) internal successors, (127), 64 states have internal predecessors, (127), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:03,127 INFO L93 Difference]: Finished difference Result 104 states and 211 transitions. [2021-06-05 23:44:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:44:03,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 23:44:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:03,135 INFO L225 Difference]: With dead ends: 104 [2021-06-05 23:44:03,135 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 23:44:03,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:44:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 23:44:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 71. [2021-06-05 23:44:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0285714285714285) internal successors, (142), 70 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 142 transitions. [2021-06-05 23:44:03,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 142 transitions. Word has length 14 [2021-06-05 23:44:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:03,159 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 142 transitions. [2021-06-05 23:44:03,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 142 transitions. [2021-06-05 23:44:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:44:03,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:03,160 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:03,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:44:03,161 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:03,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash -690736212, now seen corresponding path program 1 times [2021-06-05 23:44:03,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:03,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389681038] [2021-06-05 23:44:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:03,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:03,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389681038] [2021-06-05 23:44:03,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389681038] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:44:03,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:44:03,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:44:03,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115430005] [2021-06-05 23:44:03,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:44:03,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:03,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:44:03,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:44:03,201 INFO L87 Difference]: Start difference. First operand 71 states and 142 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:03,236 INFO L93 Difference]: Finished difference Result 91 states and 175 transitions. [2021-06-05 23:44:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:44:03,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:44:03,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:03,237 INFO L225 Difference]: With dead ends: 91 [2021-06-05 23:44:03,237 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 23:44:03,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:44:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 23:44:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-06-05 23:44:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 165 transitions. [2021-06-05 23:44:03,244 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 165 transitions. Word has length 18 [2021-06-05 23:44:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:03,244 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 165 transitions. [2021-06-05 23:44:03,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 165 transitions. [2021-06-05 23:44:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:44:03,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:03,245 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:03,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:44:03,245 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:03,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:03,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1451962588, now seen corresponding path program 1 times [2021-06-05 23:44:03,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:03,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819427740] [2021-06-05 23:44:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:03,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:03,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819427740] [2021-06-05 23:44:03,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819427740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:03,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235610299] [2021-06-05 23:44:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:44:03,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:03,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 23:44:03,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:03,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:03,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:03,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 23:44:03,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:44:03,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:03,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:03,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:03,662 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:5 [2021-06-05 23:44:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:03,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235610299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:03,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:03,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 23:44:03,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108605400] [2021-06-05 23:44:03,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:44:03,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:03,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:44:03,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:44:03,709 INFO L87 Difference]: Start difference. First operand 83 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:03,819 INFO L93 Difference]: Finished difference Result 154 states and 314 transitions. [2021-06-05 23:44:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:44:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:44:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:03,824 INFO L225 Difference]: With dead ends: 154 [2021-06-05 23:44:03,824 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 23:44:03,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:44:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 23:44:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 115. [2021-06-05 23:44:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-06-05 23:44:03,841 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 23 [2021-06-05 23:44:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:03,841 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-06-05 23:44:03,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-06-05 23:44:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:44:03,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:03,842 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:04,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 23:44:04,061 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1705470663, now seen corresponding path program 2 times [2021-06-05 23:44:04,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:04,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500012690] [2021-06-05 23:44:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:04,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:04,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500012690] [2021-06-05 23:44:04,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500012690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:04,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254361774] [2021-06-05 23:44:04,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:04,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:04,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:04,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:44:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:04,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254361774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:04,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:04,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 23:44:04,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110686054] [2021-06-05 23:44:04,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:44:04,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:04,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:44:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:44:04,251 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:04,314 INFO L93 Difference]: Finished difference Result 284 states and 566 transitions. [2021-06-05 23:44:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:44:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:44:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:04,315 INFO L225 Difference]: With dead ends: 284 [2021-06-05 23:44:04,315 INFO L226 Difference]: Without dead ends: 264 [2021-06-05 23:44:04,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:44:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-05 23:44:04,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 230. [2021-06-05 23:44:04,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1222707423580784) internal successors, (486), 229 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 486 transitions. [2021-06-05 23:44:04,324 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 486 transitions. Word has length 27 [2021-06-05 23:44:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:04,324 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 486 transitions. [2021-06-05 23:44:04,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 486 transitions. [2021-06-05 23:44:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:04,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:04,326 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:04,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:04,546 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash -906793463, now seen corresponding path program 3 times [2021-06-05 23:44:04,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:04,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915159440] [2021-06-05 23:44:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:04,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:04,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915159440] [2021-06-05 23:44:04,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915159440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:04,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86124444] [2021-06-05 23:44:04,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:04,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:44:04,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:04,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:44:04,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:05,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-06-05 23:44:05,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:16 [2021-06-05 23:44:05,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,223 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 20 treesize of output 38 [2021-06-05 23:44:05,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:05,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:05,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:05,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:21 [2021-06-05 23:44:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:05,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86124444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:05,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:05,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-06-05 23:44:05,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317203892] [2021-06-05 23:44:05,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:44:05,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:44:05,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:44:05,321 INFO L87 Difference]: Start difference. First operand 230 states and 486 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:06,955 INFO L93 Difference]: Finished difference Result 650 states and 1347 transitions. [2021-06-05 23:44:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:44:06,957 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:06,959 INFO L225 Difference]: With dead ends: 650 [2021-06-05 23:44:06,959 INFO L226 Difference]: Without dead ends: 573 [2021-06-05 23:44:06,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1312.2ms TimeCoverageRelationStatistics Valid=665, Invalid=2875, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:44:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-06-05 23:44:06,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 386. [2021-06-05 23:44:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.1818181818181817) internal successors, (840), 385 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 840 transitions. [2021-06-05 23:44:06,982 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 840 transitions. Word has length 32 [2021-06-05 23:44:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:06,983 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 840 transitions. [2021-06-05 23:44:06,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 840 transitions. [2021-06-05 23:44:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:06,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:06,990 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:07,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:07,191 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1731045687, now seen corresponding path program 4 times [2021-06-05 23:44:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:07,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342998307] [2021-06-05 23:44:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:44:07,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342998307] [2021-06-05 23:44:07,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342998307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612748001] [2021-06-05 23:44:07,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:07,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:07,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:44:07,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:08,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:08,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:44:08,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:08,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:08,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:08,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 23:44:08,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:08,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:08,162 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 24 treesize of output 10 [2021-06-05 23:44:08,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:08,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:08,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:08,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 23:44:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:08,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612748001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:08,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:08,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2021-06-05 23:44:08,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023146467] [2021-06-05 23:44:08,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:44:08,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:08,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:44:08,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:44:08,184 INFO L87 Difference]: Start difference. First operand 386 states and 840 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:08,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:08,819 INFO L93 Difference]: Finished difference Result 1023 states and 2148 transitions. [2021-06-05 23:44:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:44:08,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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 32 [2021-06-05 23:44:08,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:08,822 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 23:44:08,822 INFO L226 Difference]: Without dead ends: 878 [2021-06-05 23:44:08,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 833.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1271, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:44:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-06-05 23:44:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 432. [2021-06-05 23:44:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.1786542923433876) internal successors, (939), 431 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 939 transitions. [2021-06-05 23:44:08,838 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 939 transitions. Word has length 32 [2021-06-05 23:44:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:08,839 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 939 transitions. [2021-06-05 23:44:08,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 939 transitions. [2021-06-05 23:44:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:08,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:08,842 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:09,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:09,057 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1528740313, now seen corresponding path program 5 times [2021-06-05 23:44:09,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:09,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008344542] [2021-06-05 23:44:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:09,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:09,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008344542] [2021-06-05 23:44:09,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008344542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599530482] [2021-06-05 23:44:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:09,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:44:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:44:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:09,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:09,494 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 24 treesize of output 24 [2021-06-05 23:44:09,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:09,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:09,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:09,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 23:44:09,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:09,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:09,592 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 22 treesize of output 10 [2021-06-05 23:44:09,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:09,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:09,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:09,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 23:44:09,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:09,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599530482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:09,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:09,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 23:44:09,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647343551] [2021-06-05 23:44:09,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:44:09,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:09,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:44:09,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:44:09,611 INFO L87 Difference]: Start difference. First operand 432 states and 939 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:10,339 INFO L93 Difference]: Finished difference Result 1081 states and 2273 transitions. [2021-06-05 23:44:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:44:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:10,343 INFO L225 Difference]: With dead ends: 1081 [2021-06-05 23:44:10,343 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 23:44:10,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 573.5ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:44:10,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 23:44:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 450. [2021-06-05 23:44:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.1848552338530065) internal successors, (981), 449 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:10,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 981 transitions. [2021-06-05 23:44:10,354 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 981 transitions. Word has length 32 [2021-06-05 23:44:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:10,355 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 981 transitions. [2021-06-05 23:44:10,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:10,355 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 981 transitions. [2021-06-05 23:44:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:10,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:10,356 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:10,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:44:10,569 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash -897893841, now seen corresponding path program 6 times [2021-06-05 23:44:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:10,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895952987] [2021-06-05 23:44:10,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:44:10,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895952987] [2021-06-05 23:44:10,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895952987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:10,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741437816] [2021-06-05 23:44:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:10,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:44:10,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:44:10,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:11,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:11,001 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 24 treesize of output 24 [2021-06-05 23:44:11,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:11,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:11,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:11,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:24 [2021-06-05 23:44:11,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:11,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:11,067 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 22 treesize of output 10 [2021-06-05 23:44:11,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:11,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:11,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:11,075 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:5 [2021-06-05 23:44:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:11,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741437816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:11,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:11,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-06-05 23:44:11,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328293355] [2021-06-05 23:44:11,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:44:11,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:11,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:44:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:44:11,088 INFO L87 Difference]: Start difference. First operand 450 states and 981 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:11,575 INFO L93 Difference]: Finished difference Result 1039 states and 2202 transitions. [2021-06-05 23:44:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:44:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:11,579 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 23:44:11,579 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 23:44:11,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:44:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 23:44:11,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 487. [2021-06-05 23:44:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1790123456790123) internal successors, (1059), 486 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1059 transitions. [2021-06-05 23:44:11,589 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1059 transitions. Word has length 32 [2021-06-05 23:44:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:11,590 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1059 transitions. [2021-06-05 23:44:11,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1059 transitions. [2021-06-05 23:44:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:44:11,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:11,591 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:11,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:11,805 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:11,805 INFO L82 PathProgramCache]: Analyzing trace with hash -960521271, now seen corresponding path program 7 times [2021-06-05 23:44:11,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:11,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913698954] [2021-06-05 23:44:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:11,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913698954] [2021-06-05 23:44:11,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913698954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:11,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284754599] [2021-06-05 23:44:11,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:12,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:44:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:12,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-06-05 23:44:12,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:12,227 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:30 [2021-06-05 23:44:12,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:12,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:12,333 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 24 treesize of output 10 [2021-06-05 23:44:12,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:12,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:12,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:5 [2021-06-05 23:44:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:12,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284754599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:12,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:12,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 23:44:12,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079362433] [2021-06-05 23:44:12,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:44:12,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:44:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:44:12,352 INFO L87 Difference]: Start difference. First operand 487 states and 1059 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:12,894 INFO L93 Difference]: Finished difference Result 1050 states and 2227 transitions. [2021-06-05 23:44:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:44:12,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 23:44:12,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:12,897 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 23:44:12,897 INFO L226 Difference]: Without dead ends: 952 [2021-06-05 23:44:12,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:44:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-06-05 23:44:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 467. [2021-06-05 23:44:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.1609442060085837) internal successors, (1007), 466 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1007 transitions. [2021-06-05 23:44:12,907 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1007 transitions. Word has length 32 [2021-06-05 23:44:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:12,907 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1007 transitions. [2021-06-05 23:44:12,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:12,907 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1007 transitions. [2021-06-05 23:44:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:44:12,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:12,908 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:13,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:13,121 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:13,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:13,121 INFO L82 PathProgramCache]: Analyzing trace with hash 2010412006, now seen corresponding path program 8 times [2021-06-05 23:44:13,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:13,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163138863] [2021-06-05 23:44:13,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:13,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:13,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163138863] [2021-06-05 23:44:13,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163138863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:13,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673152014] [2021-06-05 23:44:13,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:13,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:44:13,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:13,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:44:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:13,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673152014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:13,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:13,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-06-05 23:44:13,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629881437] [2021-06-05 23:44:13,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:44:13,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:13,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:44:13,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:44:13,236 INFO L87 Difference]: Start difference. First operand 467 states and 1007 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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) [2021-06-05 23:44:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:13,296 INFO L93 Difference]: Finished difference Result 885 states and 1908 transitions. [2021-06-05 23:44:13,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:44:13,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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 36 [2021-06-05 23:44:13,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:13,299 INFO L225 Difference]: With dead ends: 885 [2021-06-05 23:44:13,299 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 23:44:13,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:44:13,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 23:44:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 716. [2021-06-05 23:44:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.1846153846153844) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2021-06-05 23:44:13,310 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 36 [2021-06-05 23:44:13,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:13,311 INFO L482 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2021-06-05 23:44:13,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 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) [2021-06-05 23:44:13,311 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2021-06-05 23:44:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:44:13,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:13,312 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:13,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:44:13,533 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:13,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:13,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1466399466, now seen corresponding path program 9 times [2021-06-05 23:44:13,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:13,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70258879] [2021-06-05 23:44:13,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:13,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:13,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70258879] [2021-06-05 23:44:13,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70258879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:13,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340121989] [2021-06-05 23:44:13,842 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:44:13,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 23:44:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:14,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:14,184 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 45 treesize of output 53 [2021-06-05 23:44:14,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:14,224 INFO L628 ElimStorePlain]: treesize reduction 43, result has 58.3 percent of original size [2021-06-05 23:44:14,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:14,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:32 [2021-06-05 23:44:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:14,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:14,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:14,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:14,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 43 [2021-06-05 23:44:14,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 23:44:14,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:14,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:14,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 23:44:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:14,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340121989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:14,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:14,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2021-06-05 23:44:14,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322803043] [2021-06-05 23:44:14,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 23:44:14,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:14,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 23:44:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:44:14,599 INFO L87 Difference]: Start difference. First operand 716 states and 1562 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 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) [2021-06-05 23:44:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:18,235 INFO L93 Difference]: Finished difference Result 2812 states and 6023 transitions. [2021-06-05 23:44:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:44:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 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 41 [2021-06-05 23:44:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:18,243 INFO L225 Difference]: With dead ends: 2812 [2021-06-05 23:44:18,243 INFO L226 Difference]: Without dead ends: 2548 [2021-06-05 23:44:18,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3752 ImplicationChecksByTransitivity, 2805.1ms TimeCoverageRelationStatistics Valid=1451, Invalid=10321, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:44:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2548 states. [2021-06-05 23:44:18,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2548 to 737. [2021-06-05 23:44:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.1480978260869565) internal successors, (1581), 736 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1581 transitions. [2021-06-05 23:44:18,265 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1581 transitions. Word has length 41 [2021-06-05 23:44:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:18,265 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 1581 transitions. [2021-06-05 23:44:18,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 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) [2021-06-05 23:44:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1581 transitions. [2021-06-05 23:44:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:44:18,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:18,266 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:18,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:18,481 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1999894166, now seen corresponding path program 10 times [2021-06-05 23:44:18,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:18,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652734951] [2021-06-05 23:44:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:44:18,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:18,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652734951] [2021-06-05 23:44:18,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652734951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:18,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364071545] [2021-06-05 23:44:18,789 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:18,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:44:18,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:44:18,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:19,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:19,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:44:19,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:19,441 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 23:44:19,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:19,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 23:44:19,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:19,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:19,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:19,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:19,742 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 46 treesize of output 16 [2021-06-05 23:44:19,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:19,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:19,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:19,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:19,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-06-05 23:44:19,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:19,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:19,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:19,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:104, output treesize:5 [2021-06-05 23:44:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:19,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364071545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:19,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:19,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 23:44:19,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463926836] [2021-06-05 23:44:19,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:44:19,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:19,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:44:19,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:44:19,772 INFO L87 Difference]: Start difference. First operand 737 states and 1581 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:21,708 INFO L93 Difference]: Finished difference Result 2302 states and 4879 transitions. [2021-06-05 23:44:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:44:21,708 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:44:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:21,713 INFO L225 Difference]: With dead ends: 2302 [2021-06-05 23:44:21,713 INFO L226 Difference]: Without dead ends: 2145 [2021-06-05 23:44:21,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1950 ImplicationChecksByTransitivity, 1714.5ms TimeCoverageRelationStatistics Valid=673, Invalid=4297, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:44:21,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-06-05 23:44:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 854. [2021-06-05 23:44:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.138335287221571) internal successors, (1824), 853 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1824 transitions. [2021-06-05 23:44:21,730 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1824 transitions. Word has length 41 [2021-06-05 23:44:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:21,730 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 1824 transitions. [2021-06-05 23:44:21,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:21,731 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1824 transitions. [2021-06-05 23:44:21,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:44:21,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:21,732 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:21,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:21,950 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:21,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:21,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1038925816, now seen corresponding path program 11 times [2021-06-05 23:44:21,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:21,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805553670] [2021-06-05 23:44:21,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:22,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:22,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805553670] [2021-06-05 23:44:22,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805553670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:22,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041057187] [2021-06-05 23:44:22,244 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:22,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:44:22,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:22,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:44:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:22,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:22,792 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 40 treesize of output 50 [2021-06-05 23:44:22,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:22,831 INFO L628 ElimStorePlain]: treesize reduction 16, result has 83.0 percent of original size [2021-06-05 23:44:22,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:22,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:54, output treesize:57 [2021-06-05 23:44:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:23,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:23,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:23,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:23,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:23,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:23,067 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 33 treesize of output 13 [2021-06-05 23:44:23,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:23,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:23,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:23,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2021-06-05 23:44:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:23,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041057187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:23,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:23,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 23:44:23,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496420955] [2021-06-05 23:44:23,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:44:23,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:23,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:44:23,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:44:23,083 INFO L87 Difference]: Start difference. First operand 854 states and 1824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:25,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:44:25,574 INFO L93 Difference]: Finished difference Result 2586 states and 5448 transitions. [2021-06-05 23:44:25,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:44:25,574 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:44:25,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:44:25,582 INFO L225 Difference]: With dead ends: 2586 [2021-06-05 23:44:25,582 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 23:44:25,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 1882.1ms TimeCoverageRelationStatistics Valid=836, Invalid=5326, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:44:25,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 23:44:25,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 746. [2021-06-05 23:44:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.153020134228188) internal successors, (1604), 745 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1604 transitions. [2021-06-05 23:44:25,599 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1604 transitions. Word has length 41 [2021-06-05 23:44:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:44:25,600 INFO L482 AbstractCegarLoop]: Abstraction has 746 states and 1604 transitions. [2021-06-05 23:44:25,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1604 transitions. [2021-06-05 23:44:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:44:25,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:44:25,601 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:44:25,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:25,814 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:44:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:44:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1257871970, now seen corresponding path program 12 times [2021-06-05 23:44:25,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:44:25,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763677439] [2021-06-05 23:44:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:44:25,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:44:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:44:26,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:44:26,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763677439] [2021-06-05 23:44:26,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763677439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:26,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738615181] [2021-06-05 23:44:26,081 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:44:26,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:44:26,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:44:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:44:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:44:26,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:26,814 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 40 treesize of output 50 [2021-06-05 23:44:26,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:26,855 INFO L628 ElimStorePlain]: treesize reduction 14, result has 83.7 percent of original size [2021-06-05 23:44:26,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:44:26,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:52, output treesize:53 [2021-06-05 23:44:28,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:28,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:28,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:28,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:28,216 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:44:28,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2021-06-05 23:44:28,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:44:28,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:44:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:44:28,277 INFO L354 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2021-06-05 23:44:28,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 1 [2021-06-05 23:44:28,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:44:28,302 INFO L628 ElimStorePlain]: treesize reduction 21, result has 59.6 percent of original size [2021-06-05 23:44:28,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:44:28,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:100, output treesize:21 [2021-06-05 23:44:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:44:28,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738615181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:44:28,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:44:28,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-05 23:44:28,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213857687] [2021-06-05 23:44:28,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:44:28,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:44:28,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:44:28,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:44:28,383 INFO L87 Difference]: Start difference. First operand 746 states and 1604 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:44:31,356 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-05 23:44:32,410 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-06-05 23:44:33,071 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 23:44:33,488 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 23:44:34,133 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 23:44:34,922 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 23:44:37,446 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 23:44:38,212 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 40 [2021-06-05 23:44:39,172 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-05 23:44:39,500 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-06-05 23:44:41,910 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2021-06-05 23:44:45,881 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 23:44:46,091 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-06-05 23:44:46,983 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-06-05 23:44:47,602 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 23:44:48,196 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 23:44:49,865 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2021-06-05 23:44:57,215 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-06-05 23:45:00,953 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 23:45:01,687 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-05 23:45:05,071 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-05 23:45:08,381 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-05 23:45:08,888 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-06-05 23:45:10,118 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-06-05 23:45:11,288 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-06-05 23:45:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:13,043 INFO L93 Difference]: Finished difference Result 3393 states and 7212 transitions. [2021-06-05 23:45:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-06-05 23:45:13,044 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:45:13,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:13,051 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 23:45:13,051 INFO L226 Difference]: Without dead ends: 3071 [2021-06-05 23:45:13,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5844 ImplicationChecksByTransitivity, 28360.9ms TimeCoverageRelationStatistics Valid=2687, Invalid=14342, Unknown=1, NotChecked=0, Total=17030 [2021-06-05 23:45:13,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2021-06-05 23:45:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 882. [2021-06-05 23:45:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.155505107832009) internal successors, (1899), 881 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1899 transitions. [2021-06-05 23:45:13,078 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1899 transitions. Word has length 41 [2021-06-05 23:45:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:13,078 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 1899 transitions. [2021-06-05 23:45:13,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1899 transitions. [2021-06-05 23:45:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:45:13,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:13,080 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:13,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:13,281 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2064541460, now seen corresponding path program 13 times [2021-06-05 23:45:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:13,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505780904] [2021-06-05 23:45:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:45:13,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505780904] [2021-06-05 23:45:13,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505780904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372692407] [2021-06-05 23:45:13,599 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:45:13,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:14,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2021-06-05 23:45:14,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:14,288 INFO L628 ElimStorePlain]: treesize reduction 47, result has 60.8 percent of original size [2021-06-05 23:45:14,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:14,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:41 [2021-06-05 23:45:14,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:14,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:14,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:14,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:14,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:14,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:14,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:14,393 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 35 treesize of output 13 [2021-06-05 23:45:14,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:14,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:14,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:14,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 23:45:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:14,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372692407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:14,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:14,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 35 [2021-06-05 23:45:14,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686336781] [2021-06-05 23:45:14,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:45:14,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:45:14,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:45:14,412 INFO L87 Difference]: Start difference. First operand 882 states and 1899 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:16,523 INFO L93 Difference]: Finished difference Result 3308 states and 7100 transitions. [2021-06-05 23:45:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:45:16,524 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:45:16,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:16,531 INFO L225 Difference]: With dead ends: 3308 [2021-06-05 23:45:16,531 INFO L226 Difference]: Without dead ends: 3100 [2021-06-05 23:45:16,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1538.0ms TimeCoverageRelationStatistics Valid=578, Invalid=3582, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:45:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-05 23:45:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1074. [2021-06-05 23:45:16,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.1491146318732524) internal successors, (2306), 1073 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:16,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2306 transitions. [2021-06-05 23:45:16,552 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2306 transitions. Word has length 41 [2021-06-05 23:45:16,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:16,552 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 2306 transitions. [2021-06-05 23:45:16,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2306 transitions. [2021-06-05 23:45:16,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:45:16,553 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:16,553 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:16,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 23:45:16,768 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:16,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:16,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1195244540, now seen corresponding path program 14 times [2021-06-05 23:45:16,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:16,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439568285] [2021-06-05 23:45:16,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:17,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:17,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439568285] [2021-06-05 23:45:17,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439568285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:17,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135844414] [2021-06-05 23:45:17,112 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:17,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:17,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:45:17,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:17,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:17,720 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 42 treesize of output 52 [2021-06-05 23:45:17,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:17,760 INFO L628 ElimStorePlain]: treesize reduction 16, result has 84.3 percent of original size [2021-06-05 23:45:17,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:17,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:65 [2021-06-05 23:45:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:17,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:17,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:17,913 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 35 treesize of output 13 [2021-06-05 23:45:17,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:17,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:17,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:17,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:5 [2021-06-05 23:45:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:17,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135844414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:17,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:17,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 23:45:17,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183049352] [2021-06-05 23:45:17,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:45:17,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:45:17,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:45:17,930 INFO L87 Difference]: Start difference. First operand 1074 states and 2306 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:20,490 INFO L93 Difference]: Finished difference Result 3729 states and 7998 transitions. [2021-06-05 23:45:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:45:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 23:45:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:20,499 INFO L225 Difference]: With dead ends: 3729 [2021-06-05 23:45:20,499 INFO L226 Difference]: Without dead ends: 3485 [2021-06-05 23:45:20,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1802.6ms TimeCoverageRelationStatistics Valid=606, Invalid=3684, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:45:20,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2021-06-05 23:45:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 1340. [2021-06-05 23:45:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 2.1598207617625094) internal successors, (2892), 1339 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2892 transitions. [2021-06-05 23:45:20,525 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2892 transitions. Word has length 41 [2021-06-05 23:45:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:20,525 INFO L482 AbstractCegarLoop]: Abstraction has 1340 states and 2892 transitions. [2021-06-05 23:45:20,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2892 transitions. [2021-06-05 23:45:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:45:20,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:20,527 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:20,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:20,744 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:20,744 INFO L82 PathProgramCache]: Analyzing trace with hash -920574034, now seen corresponding path program 15 times [2021-06-05 23:45:20,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:20,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639126270] [2021-06-05 23:45:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:21,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:21,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639126270] [2021-06-05 23:45:21,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639126270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:21,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791803981] [2021-06-05 23:45:21,057 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:21,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:45:21,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:21,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 23:45:21,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:21,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:21,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2021-06-05 23:45:21,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:21,553 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.4 percent of original size [2021-06-05 23:45:21,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:21,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:56, output treesize:57 [2021-06-05 23:45:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:21,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:21,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:21,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 63 [2021-06-05 23:45:22,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 23:45:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:22,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:22,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:22,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:22,040 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-06-05 23:45:22,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 38 [2021-06-05 23:45:22,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:22,102 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-06-05 23:45:22,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:45:22,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:36 [2021-06-05 23:45:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:22,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791803981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:22,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:22,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 23:45:22,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016487371] [2021-06-05 23:45:22,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:45:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:22,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:45:22,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:45:22,222 INFO L87 Difference]: Start difference. First operand 1340 states and 2892 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 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) [2021-06-05 23:45:25,380 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-05 23:45:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:25,551 INFO L93 Difference]: Finished difference Result 3544 states and 7640 transitions. [2021-06-05 23:45:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:45:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 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 41 [2021-06-05 23:45:25,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:25,556 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 23:45:25,556 INFO L226 Difference]: Without dead ends: 3383 [2021-06-05 23:45:25,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 2814.8ms TimeCoverageRelationStatistics Valid=656, Invalid=3900, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:45:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2021-06-05 23:45:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 1483. [2021-06-05 23:45:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.163292847503374) internal successors, (3206), 1482 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3206 transitions. [2021-06-05 23:45:25,579 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3206 transitions. Word has length 41 [2021-06-05 23:45:25,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:25,579 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 3206 transitions. [2021-06-05 23:45:25,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 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) [2021-06-05 23:45:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3206 transitions. [2021-06-05 23:45:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:45:25,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:25,582 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:25,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 23:45:25,797 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1060291469, now seen corresponding path program 16 times [2021-06-05 23:45:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:25,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819300473] [2021-06-05 23:45:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:25,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:25,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819300473] [2021-06-05 23:45:25,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819300473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:25,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508284104] [2021-06-05 23:45:25,851 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:25,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:45:25,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:45:25,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508284104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:25,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:25,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-06-05 23:45:25,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901878742] [2021-06-05 23:45:25,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:45:25,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:25,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:45:25,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:45:25,955 INFO L87 Difference]: Start difference. First operand 1483 states and 3206 transitions. Second operand has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:26,026 INFO L93 Difference]: Finished difference Result 2019 states and 4365 transitions. [2021-06-05 23:45:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:45:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:45:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:26,030 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 23:45:26,030 INFO L226 Difference]: Without dead ends: 1969 [2021-06-05 23:45:26,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:45:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1969 states. [2021-06-05 23:45:26,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1969 to 1621. [2021-06-05 23:45:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.175925925925926) internal successors, (3525), 1620 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3525 transitions. [2021-06-05 23:45:26,050 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3525 transitions. Word has length 45 [2021-06-05 23:45:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:26,050 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3525 transitions. [2021-06-05 23:45:26,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.454545454545454) internal successors, (71), 10 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3525 transitions. [2021-06-05 23:45:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:45:26,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:26,053 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:26,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:26,269 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1067334948, now seen corresponding path program 17 times [2021-06-05 23:45:26,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:26,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975801639] [2021-06-05 23:45:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-05 23:45:26,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:26,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975801639] [2021-06-05 23:45:26,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975801639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:26,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702114813] [2021-06-05 23:45:26,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:26,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:45:26,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:26,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:45:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 23:45:26,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702114813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:26,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:26,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 23:45:26,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198390660] [2021-06-05 23:45:26,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:45:26,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:26,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:45:26,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:45:26,393 INFO L87 Difference]: Start difference. First operand 1621 states and 3525 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:26,429 INFO L93 Difference]: Finished difference Result 2104 states and 4548 transitions. [2021-06-05 23:45:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:45:26,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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 46 [2021-06-05 23:45:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:26,432 INFO L225 Difference]: With dead ends: 2104 [2021-06-05 23:45:26,432 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 23:45:26,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:45:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 23:45:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1445. [2021-06-05 23:45:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.1717451523545708) internal successors, (3136), 1444 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 3136 transitions. [2021-06-05 23:45:26,454 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 3136 transitions. Word has length 46 [2021-06-05 23:45:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:26,454 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 3136 transitions. [2021-06-05 23:45:26,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 3136 transitions. [2021-06-05 23:45:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:45:26,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:26,456 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:26,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:26,671 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:26,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1691572838, now seen corresponding path program 18 times [2021-06-05 23:45:26,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:26,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511472170] [2021-06-05 23:45:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:45:26,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:26,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511472170] [2021-06-05 23:45:26,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511472170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:26,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359156591] [2021-06-05 23:45:26,739 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:26,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:45:26,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:45:26,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 23:45:26,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359156591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:26,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:26,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 23:45:26,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271312271] [2021-06-05 23:45:26,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:45:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:26,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:45:26,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:45:26,844 INFO L87 Difference]: Start difference. First operand 1445 states and 3136 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:26,867 INFO L93 Difference]: Finished difference Result 1604 states and 3442 transitions. [2021-06-05 23:45:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:45:26,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 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 46 [2021-06-05 23:45:26,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:26,870 INFO L225 Difference]: With dead ends: 1604 [2021-06-05 23:45:26,870 INFO L226 Difference]: Without dead ends: 1604 [2021-06-05 23:45:26,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:45:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-06-05 23:45:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1207. [2021-06-05 23:45:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.1550580431177444) internal successors, (2599), 1206 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2599 transitions. [2021-06-05 23:45:26,883 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2599 transitions. Word has length 46 [2021-06-05 23:45:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:26,883 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2599 transitions. [2021-06-05 23:45:26,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:26,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2599 transitions. [2021-06-05 23:45:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:45:26,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:26,884 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:27,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 23:45:27,092 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:27,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:27,094 INFO L82 PathProgramCache]: Analyzing trace with hash -623804093, now seen corresponding path program 19 times [2021-06-05 23:45:27,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:27,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895047587] [2021-06-05 23:45:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:27,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895047587] [2021-06-05 23:45:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895047587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530967494] [2021-06-05 23:45:27,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:27,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:45:27,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:28,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2021-06-05 23:45:28,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,322 INFO L628 ElimStorePlain]: treesize reduction 86, result has 58.7 percent of original size [2021-06-05 23:45:28,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:28,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:72, output treesize:48 [2021-06-05 23:45:28,773 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-05 23:45:28,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2021-06-05 23:45:28,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:28,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:28,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:5 [2021-06-05 23:45:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:28,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530967494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:28,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:28,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 49 [2021-06-05 23:45:28,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242827626] [2021-06-05 23:45:28,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-06-05 23:45:28,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-06-05 23:45:28,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2161, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:45:28,786 INFO L87 Difference]: Start difference. First operand 1207 states and 2599 transitions. Second operand has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:32,289 INFO L93 Difference]: Finished difference Result 2755 states and 5872 transitions. [2021-06-05 23:45:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:45:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 23:45:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:32,292 INFO L225 Difference]: With dead ends: 2755 [2021-06-05 23:45:32,292 INFO L226 Difference]: Without dead ends: 2659 [2021-06-05 23:45:32,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 2653.8ms TimeCoverageRelationStatistics Valid=812, Invalid=7198, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 23:45:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2659 states. [2021-06-05 23:45:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2659 to 1299. [2021-06-05 23:45:32,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.1656394453004624) internal successors, (2811), 1298 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2811 transitions. [2021-06-05 23:45:32,312 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2811 transitions. Word has length 50 [2021-06-05 23:45:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:32,312 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 2811 transitions. [2021-06-05 23:45:32,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.72) internal successors, (86), 49 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2811 transitions. [2021-06-05 23:45:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:45:32,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:32,314 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:32,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:32,529 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -231269501, now seen corresponding path program 20 times [2021-06-05 23:45:32,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:32,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276591557] [2021-06-05 23:45:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:45:32,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:32,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276591557] [2021-06-05 23:45:32,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276591557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:32,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629773974] [2021-06-05 23:45:32,982 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:33,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:45:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:45:33,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:34,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2021-06-05 23:45:34,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,198 INFO L628 ElimStorePlain]: treesize reduction 75, result has 66.5 percent of original size [2021-06-05 23:45:34,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:45:34,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:76, output treesize:76 [2021-06-05 23:45:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,689 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 57 treesize of output 19 [2021-06-05 23:45:34,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:45:34,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:45:34,701 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 46 treesize of output 16 [2021-06-05 23:45:34,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:34,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:45:34,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:126, output treesize:5 [2021-06-05 23:45:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:34,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629773974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:34,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:45:34,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 47 [2021-06-05 23:45:34,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109378751] [2021-06-05 23:45:34,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:45:34,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:45:34,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:45:34,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:45:34,726 INFO L87 Difference]: Start difference. First operand 1299 states and 2811 transitions. Second operand has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:40,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:45:40,017 INFO L93 Difference]: Finished difference Result 3297 states and 7007 transitions. [2021-06-05 23:45:40,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:45:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 23:45:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:45:40,022 INFO L225 Difference]: With dead ends: 3297 [2021-06-05 23:45:40,022 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 23:45:40,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 8 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4889 ImplicationChecksByTransitivity, 4456.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=11305, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 23:45:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 23:45:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 1653. [2021-06-05 23:45:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.151331719128329) internal successors, (3554), 1652 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 3554 transitions. [2021-06-05 23:45:40,045 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 3554 transitions. Word has length 50 [2021-06-05 23:45:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:45:40,045 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 3554 transitions. [2021-06-05 23:45:40,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:45:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 3554 transitions. [2021-06-05 23:45:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 23:45:40,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:45:40,047 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:45:40,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 23:45:40,261 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:45:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:45:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1024877813, now seen corresponding path program 21 times [2021-06-05 23:45:40,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:45:40,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543762946] [2021-06-05 23:45:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:45:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:45:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:45:40,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:45:40,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543762946] [2021-06-05 23:45:40,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543762946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:45:40,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970906591] [2021-06-05 23:45:40,761 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:45:40,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:45:40,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:45:40,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:45:40,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:45:43,325 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 23:45:43,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:43,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 23:45:43,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:43,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:45:43,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2021-06-05 23:45:43,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:45:43,723 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 101 [2021-06-05 23:45:43,723 INFO L628 ElimStorePlain]: treesize reduction 124, result has 69.2 percent of original size [2021-06-05 23:45:43,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 14 dim-0 vars, 1 dim-1 vars, End of recursive call: 8 dim-0 vars, and 2 xjuncts. [2021-06-05 23:45:43,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 15 variables, input treesize:163, output treesize:150 [2021-06-05 23:45:54,500 WARN L205 SmtUtils]: Spent 6.26 s on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 23:46:17,175 WARN L205 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-05 23:46:17,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:46:17,503 INFO L354 Elim1Store]: treesize reduction 16, result has 85.8 percent of original size [2021-06-05 23:46:17,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 45 treesize of output 115 [2021-06-05 23:46:17,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:46:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:46:18,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:46:18,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 38 treesize of output 128 [2021-06-05 23:46:19,056 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 201 [2021-06-05 23:46:19,309 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 23:46:19,464 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 261 [2021-06-05 23:46:19,632 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 269 [2021-06-05 23:46:20,425 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 23:46:20,646 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 60 [2021-06-05 23:46:20,952 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 61 [2021-06-05 23:46:21,239 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-06-05 23:46:21,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 23:46:21,485 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 73 [2021-06-05 23:46:21,486 INFO L628 ElimStorePlain]: treesize reduction 474, result has 24.8 percent of original size [2021-06-05 23:46:21,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 23:46:21,532 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:133, output treesize:47 [2021-06-05 23:46:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:46:21,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970906591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:46:21,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:46:21,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-06-05 23:46:21,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061427655] [2021-06-05 23:46:21,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:46:21,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:46:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:46:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2269, Unknown=2, NotChecked=0, Total=2550 [2021-06-05 23:46:21,648 INFO L87 Difference]: Start difference. First operand 1653 states and 3554 transitions. Second operand has 51 states, 51 states have (on average 1.8431372549019607) internal successors, (94), 50 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:46:41,020 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 137 DAG size of output: 40 [2021-06-05 23:46:42,598 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 23:46:51,557 WARN L205 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 142 DAG size of output: 42 [2021-06-05 23:46:54,859 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-06-05 23:47:09,069 WARN L205 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2021-06-05 23:47:13,799 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 23:47:17,825 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2021-06-05 23:47:26,498 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2021-06-05 23:47:37,471 WARN L205 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 134 DAG size of output: 44 [2021-06-05 23:47:49,064 WARN L205 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2021-06-05 23:47:56,369 WARN L205 SmtUtils]: Spent 5.75 s on a formula simplification. DAG size of input: 124 DAG size of output: 46 [2021-06-05 23:48:01,168 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 23:48:12,370 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 55 [2021-06-05 23:48:17,580 WARN L205 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 73 [2021-06-05 23:48:23,064 WARN L205 SmtUtils]: Spent 4.49 s on a formula simplification. DAG size of input: 126 DAG size of output: 48 [2021-06-05 23:48:35,372 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 51 [2021-06-05 23:48:42,927 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2021-06-05 23:48:51,292 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2021-06-05 23:48:58,688 WARN L205 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2021-06-05 23:49:05,594 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 23:49:28,554 WARN L205 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 125 DAG size of output: 53 [2021-06-05 23:49:43,524 WARN L205 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 131 DAG size of output: 51 [2021-06-05 23:49:57,373 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 127 DAG size of output: 68 [2021-06-05 23:50:11,803 WARN L205 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2021-06-05 23:50:21,132 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-06-05 23:50:28,050 WARN L205 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 141 DAG size of output: 51 [2021-06-05 23:50:37,577 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2021-06-05 23:51:02,867 WARN L205 SmtUtils]: Spent 10.77 s on a formula simplification. DAG size of input: 134 DAG size of output: 57 [2021-06-05 23:51:21,563 WARN L205 SmtUtils]: Spent 9.63 s on a formula simplification. DAG size of input: 110 DAG size of output: 58 [2021-06-05 23:51:26,066 WARN L205 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2021-06-05 23:51:44,583 WARN L205 SmtUtils]: Spent 7.87 s on a formula simplification. DAG size of input: 130 DAG size of output: 56 [2021-06-05 23:52:01,983 WARN L205 SmtUtils]: Spent 8.94 s on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2021-06-05 23:52:38,883 WARN L205 SmtUtils]: Spent 10.07 s on a formula simplification. DAG size of input: 134 DAG size of output: 62 [2021-06-05 23:52:48,078 WARN L205 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-06-05 23:52:53,168 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2021-06-05 23:53:19,247 WARN L205 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 140 DAG size of output: 50 [2021-06-05 23:53:42,920 WARN L205 SmtUtils]: Spent 7.75 s on a formula simplification. DAG size of input: 117 DAG size of output: 65 [2021-06-05 23:53:58,312 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2021-06-05 23:54:05,204 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2021-06-05 23:54:16,261 WARN L205 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-06-05 23:55:02,119 WARN L205 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 145 DAG size of output: 52 [2021-06-05 23:55:19,329 WARN L205 SmtUtils]: Spent 6.70 s on a formula simplification. DAG size of input: 102 DAG size of output: 65 [2021-06-05 23:55:31,139 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-06-05 23:55:37,555 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2021-06-05 23:55:55,741 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 120 DAG size of output: 63 [2021-06-05 23:56:13,525 WARN L205 SmtUtils]: Spent 9.80 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 23:56:38,141 WARN L205 SmtUtils]: Spent 9.00 s on a formula simplification. DAG size of input: 117 DAG size of output: 72 [2021-06-05 23:57:06,713 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2021-06-05 23:57:18,426 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2021-06-05 23:57:28,689 WARN L205 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-06-05 23:57:56,362 WARN L205 SmtUtils]: Spent 10.04 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-06-05 23:58:11,207 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 Received shutdown request... [2021-06-05 23:58:39,774 WARN L222 SmtUtils]: Removed 4 from assertion stack [2021-06-05 23:58:39,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-06-05 23:58:39,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 23:58:39,976 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:58:39,977 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:58:39,978 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:58:39,979 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:58:39 BasicIcfg [2021-06-05 23:58:39,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:58:39,979 INFO L168 Benchmark]: Toolchain (without parser) took 877449.48 ms. Allocated memory was 396.4 MB in the beginning and 574.6 MB in the end (delta: 178.3 MB). Free memory was 375.6 MB in the beginning and 397.4 MB in the end (delta: -21.7 MB). Peak memory consumption was 158.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:58:39,979 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 396.4 MB. Free memory was 376.8 MB in the beginning and 376.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:58:39,979 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.08 ms. Allocated memory is still 396.4 MB. Free memory was 375.6 MB in the beginning and 374.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:58:39,979 INFO L168 Benchmark]: Boogie Preprocessor took 10.75 ms. Allocated memory is still 396.4 MB. Free memory was 374.1 MB in the beginning and 373.2 MB in the end (delta: 947.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:58:39,979 INFO L168 Benchmark]: RCFGBuilder took 286.59 ms. Allocated memory is still 396.4 MB. Free memory was 373.1 MB in the beginning and 360.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:58:39,979 INFO L168 Benchmark]: TraceAbstraction took 877130.43 ms. Allocated memory was 396.4 MB in the beginning and 574.6 MB in the end (delta: 178.3 MB). Free memory was 360.0 MB in the beginning and 397.4 MB in the end (delta: -37.4 MB). Peak memory consumption was 143.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:58:39,980 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 0.10 ms. Allocated memory is still 396.4 MB. Free memory was 376.8 MB in the beginning and 376.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.08 ms. Allocated memory is still 396.4 MB. Free memory was 375.6 MB in the beginning and 374.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.75 ms. Allocated memory is still 396.4 MB. Free memory was 374.1 MB in the beginning and 373.2 MB in the end (delta: 947.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 286.59 ms. Allocated memory is still 396.4 MB. Free memory was 373.1 MB in the beginning and 360.4 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 877130.43 ms. Allocated memory was 396.4 MB in the beginning and 574.6 MB in the end (delta: 178.3 MB). Free memory was 360.0 MB in the beginning and 397.4 MB in the end (delta: -37.4 MB). Peak memory consumption was 143.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1653states) and FLOYD_HOARE automaton (currently 118 states, 51 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 101 for 7402ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 877027.2ms, OverallIterations: 23, TraceHistogramMax: 4, EmptinessCheckTime: 37.8ms, AutomataDifference: 812216.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1121 SDtfs, 5158 SDslu, 11834 SDs, 0 SdLazy, 28210 SolverSat, 3110 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 132523.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1808 GetRequests, 591 SyntacticMatches, 45 SemanticMatches, 1171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36344 ImplicationChecksByTransitivity, 699611.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1653occurred in iteration=22, InterpolantAutomatonStates: 750, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 364.0ms AutomataMinimizationTime, 22 MinimizatonAttempts, 19446 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 96.7ms SsaConstructionTime, 377.5ms SatisfiabilityAnalysisTime, 58789.8ms InterpolantComputationTime, 1672 NumberOfCodeBlocks, 1672 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 1628 ConstructedInterpolants, 296 QuantifiedInterpolants, 27566 SizeOfPredicates, 225 NumberOfNonLiveVariables, 1741 ConjunctsInSsa, 538 ConjunctsInUnsatCore, 44 InterpolantComputations, 2 PerfectInterpolantSequences, 268/1315 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