/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:57:35,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:57:35,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:57:35,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:57:35,754 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:57:35,782 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:57:35,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:57:35,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:57:35,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:57:35,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:57:35,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:57:35,784 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:57:35,785 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:57:35,785 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:57:35,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:57:35,786 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:57:35,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:57:35,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:57:35,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:57:35,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:57:35,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:57:35,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:57:35,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:57:35,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:57:35,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:57:35,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:57:35,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:57:35,788 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:57:35,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:57:35,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:57:36,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:57:36,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:57:36,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:57:36,110 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:57:36,111 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:57:36,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl [2021-07-13 19:57:36,112 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/figure1-alt.wvr.bpl' [2021-07-13 19:57:36,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:57:36,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:57:36,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:57:36,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:57:36,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:57:36,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,158 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:57:36,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:57:36,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:57:36,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:57:36,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... [2021-07-13 19:57:36,171 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:57:36,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:57:36,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:57:36,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:57:36,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:57:36,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:57:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:57:36,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:57:36,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:57:36,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:57:36,227 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:57:36,227 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:57:36,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:57:36,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:57:36,228 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:57:36,359 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:57:36,359 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:57:36,360 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:57:36 BoogieIcfgContainer [2021-07-13 19:57:36,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:57:36,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:57:36,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:57:36,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:57:36,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:57:36" (1/2) ... [2021-07-13 19:57:36,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea5f620 and model type figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:57:36, skipping insertion in model container [2021-07-13 19:57:36,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:57:36" (2/2) ... [2021-07-13 19:57:36,365 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.bpl [2021-07-13 19:57:36,368 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:57:36,368 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:57:36,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:57:36,369 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:57:36,386 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:57:36,400 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:57:36,411 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:57:36,412 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:57:36,412 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:57:36,412 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:57:36,412 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:57:36,412 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:57:36,412 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:57:36,412 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:57:36,418 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-07-13 19:57:36,426 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:36,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:57:36,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:36,432 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:36,432 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1829606569, now seen corresponding path program 1 times [2021-07-13 19:57:36,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:36,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291324411] [2021-07-13 19:57:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:36,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:36,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291324411] [2021-07-13 19:57:36,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291324411] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:57:36,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:57:36,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:57:36,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468986113] [2021-07-13 19:57:36,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:57:36,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:57:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:57:36,764 INFO L87 Difference]: Start difference. First operand has 33 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:36,966 INFO L93 Difference]: Finished difference Result 67 states and 111 transitions. [2021-07-13 19:57:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:57:36,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:57:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:36,990 INFO L225 Difference]: With dead ends: 67 [2021-07-13 19:57:36,990 INFO L226 Difference]: Without dead ends: 52 [2021-07-13 19:57:36,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:57:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-13 19:57:37,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2021-07-13 19:57:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 69 transitions. [2021-07-13 19:57:37,051 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 69 transitions. Word has length 15 [2021-07-13 19:57:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:37,052 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 69 transitions. [2021-07-13 19:57:37,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 69 transitions. [2021-07-13 19:57:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:57:37,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:37,054 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:37,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:57:37,054 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1179537599, now seen corresponding path program 2 times [2021-07-13 19:57:37,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:37,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971319492] [2021-07-13 19:57:37,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:37,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:37,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971319492] [2021-07-13 19:57:37,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971319492] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:57:37,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:57:37,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:57:37,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250561021] [2021-07-13 19:57:37,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:57:37,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:37,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:57:37,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:57:37,230 INFO L87 Difference]: Start difference. First operand 39 states and 69 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:37,350 INFO L93 Difference]: Finished difference Result 50 states and 85 transitions. [2021-07-13 19:57:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:57:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:57:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:37,352 INFO L225 Difference]: With dead ends: 50 [2021-07-13 19:57:37,352 INFO L226 Difference]: Without dead ends: 43 [2021-07-13 19:57:37,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:57:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-13 19:57:37,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-07-13 19:57:37,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.8) internal successors, (72), 40 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 72 transitions. [2021-07-13 19:57:37,366 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 72 transitions. Word has length 15 [2021-07-13 19:57:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:37,366 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 72 transitions. [2021-07-13 19:57:37,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 72 transitions. [2021-07-13 19:57:37,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:57:37,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:37,367 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:37,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:57:37,368 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:37,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1059156761, now seen corresponding path program 1 times [2021-07-13 19:57:37,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:37,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117832411] [2021-07-13 19:57:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:37,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:37,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117832411] [2021-07-13 19:57:37,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117832411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:37,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557792192] [2021-07-13 19:57:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:37,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:37,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:57:37,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:37,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557792192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:37,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:37,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:57:37,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342147618] [2021-07-13 19:57:37,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:57:37,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:37,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:57:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:57:37,861 INFO L87 Difference]: Start difference. First operand 41 states and 72 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:38,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:38,157 INFO L93 Difference]: Finished difference Result 107 states and 185 transitions. [2021-07-13 19:57:38,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:57:38,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-07-13 19:57:38,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:38,159 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:57:38,159 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:57:38,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:57:38,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:57:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2021-07-13 19:57:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-07-13 19:57:38,163 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-07-13 19:57:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:38,164 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-07-13 19:57:38,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-07-13 19:57:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:57:38,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:38,165 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:38,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 19:57:38,384 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1709225731, now seen corresponding path program 2 times [2021-07-13 19:57:38,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:38,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438474167] [2021-07-13 19:57:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:38,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:38,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438474167] [2021-07-13 19:57:38,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438474167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:38,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924487663] [2021-07-13 19:57:38,503 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 [2021-07-13 19:57:38,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:57:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:38,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924487663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:38,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:38,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:57:38,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339632230] [2021-07-13 19:57:38,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:57:38,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:38,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:57:38,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:57:38,761 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:39,083 INFO L93 Difference]: Finished difference Result 117 states and 198 transitions. [2021-07-13 19:57:39,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:57:39,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-07-13 19:57:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:39,084 INFO L225 Difference]: With dead ends: 117 [2021-07-13 19:57:39,084 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:57:39,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 421.9ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:57:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:57:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 46. [2021-07-13 19:57:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.8666666666666667) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 84 transitions. [2021-07-13 19:57:39,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 84 transitions. Word has length 17 [2021-07-13 19:57:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:39,089 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 84 transitions. [2021-07-13 19:57:39,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 84 transitions. [2021-07-13 19:57:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:57:39,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:39,090 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:39,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:39,308 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:39,309 INFO L82 PathProgramCache]: Analyzing trace with hash -351634071, now seen corresponding path program 3 times [2021-07-13 19:57:39,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:39,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900382096] [2021-07-13 19:57:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:39,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:39,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900382096] [2021-07-13 19:57:39,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900382096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516889407] [2021-07-13 19:57:39,398 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 [2021-07-13 19:57:39,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:57:39,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:39,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:57:39,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516889407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:39,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:57:39,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89118300] [2021-07-13 19:57:39,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:57:39,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:39,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:57:39,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:57:39,660 INFO L87 Difference]: Start difference. First operand 46 states and 84 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:39,950 INFO L93 Difference]: Finished difference Result 94 states and 156 transitions. [2021-07-13 19:57:39,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:57:39,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-07-13 19:57:39,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:39,951 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:57:39,951 INFO L226 Difference]: Without dead ends: 80 [2021-07-13 19:57:39,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:57:39,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-07-13 19:57:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-07-13 19:57:39,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.8235294117647058) internal successors, (93), 51 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 93 transitions. [2021-07-13 19:57:39,955 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 93 transitions. Word has length 17 [2021-07-13 19:57:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:39,955 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 93 transitions. [2021-07-13 19:57:39,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 93 transitions. [2021-07-13 19:57:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:57:39,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:39,956 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:40,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:40,172 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:40,172 INFO L82 PathProgramCache]: Analyzing trace with hash -886863873, now seen corresponding path program 4 times [2021-07-13 19:57:40,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:40,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820804586] [2021-07-13 19:57:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:40,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:40,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820804586] [2021-07-13 19:57:40,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820804586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:40,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491148446] [2021-07-13 19:57:40,258 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 [2021-07-13 19:57:40,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:57:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:40,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491148446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:40,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:40,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:57:40,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766741862] [2021-07-13 19:57:40,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:57:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:57:40,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:57:40,481 INFO L87 Difference]: Start difference. First operand 52 states and 93 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:40,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:40,709 INFO L93 Difference]: Finished difference Result 87 states and 147 transitions. [2021-07-13 19:57:40,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:57:40,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 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 17 [2021-07-13 19:57:40,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:40,710 INFO L225 Difference]: With dead ends: 87 [2021-07-13 19:57:40,710 INFO L226 Difference]: Without dead ends: 49 [2021-07-13 19:57:40,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:57:40,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-13 19:57:40,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2021-07-13 19:57:40,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 43 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) [2021-07-13 19:57:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 77 transitions. [2021-07-13 19:57:40,712 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 77 transitions. Word has length 17 [2021-07-13 19:57:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:40,713 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 77 transitions. [2021-07-13 19:57:40,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 77 transitions. [2021-07-13 19:57:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:57:40,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:40,713 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:40,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:40,930 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:40,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:40,930 INFO L82 PathProgramCache]: Analyzing trace with hash -980318313, now seen corresponding path program 1 times [2021-07-13 19:57:40,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:40,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683193649] [2021-07-13 19:57:40,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:40,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:41,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:41,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683193649] [2021-07-13 19:57:41,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683193649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:41,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538073025] [2021-07-13 19:57:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:41,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:57:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:41,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538073025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:41,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:41,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:57:41,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373686497] [2021-07-13 19:57:41,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:57:41,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:41,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:57:41,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:57:41,237 INFO L87 Difference]: Start difference. First operand 44 states and 77 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:41,490 INFO L93 Difference]: Finished difference Result 113 states and 197 transitions. [2021-07-13 19:57:41,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:57:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:57:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:41,491 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:57:41,491 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:57:41,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:57:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:57:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-07-13 19:57:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.849056603773585) internal successors, (98), 53 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 98 transitions. [2021-07-13 19:57:41,495 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 98 transitions. Word has length 19 [2021-07-13 19:57:41,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:41,495 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 98 transitions. [2021-07-13 19:57:41,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:41,495 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 98 transitions. [2021-07-13 19:57:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:57:41,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:41,495 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:41,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-07-13 19:57:41,712 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2049721123, now seen corresponding path program 2 times [2021-07-13 19:57:41,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:41,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115564910] [2021-07-13 19:57:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:41,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:41,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115564910] [2021-07-13 19:57:41,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115564910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:41,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168765962] [2021-07-13 19:57:41,794 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:41,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:41,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:41,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:57:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168765962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:42,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:57:42,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100192711] [2021-07-13 19:57:42,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:57:42,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:42,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:57:42,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:57:42,046 INFO L87 Difference]: Start difference. First operand 54 states and 98 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:42,359 INFO L93 Difference]: Finished difference Result 120 states and 202 transitions. [2021-07-13 19:57:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:57:42,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:57:42,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:42,360 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:57:42,360 INFO L226 Difference]: Without dead ends: 94 [2021-07-13 19:57:42,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-07-13 19:57:42,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-07-13 19:57:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8363636363636364) internal successors, (101), 55 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 101 transitions. [2021-07-13 19:57:42,363 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 101 transitions. Word has length 19 [2021-07-13 19:57:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:42,363 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 101 transitions. [2021-07-13 19:57:42,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 101 transitions. [2021-07-13 19:57:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:57:42,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:42,364 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:42,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:42,581 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:42,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1109060901, now seen corresponding path program 3 times [2021-07-13 19:57:42,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:42,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510118844] [2021-07-13 19:57:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510118844] [2021-07-13 19:57:42,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510118844] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641508593] [2021-07-13 19:57:42,671 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:42,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:57:42,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:42,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:57:42,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641508593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:42,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:57:42,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578128794] [2021-07-13 19:57:42,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:57:42,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:42,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:57:42,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:57:42,908 INFO L87 Difference]: Start difference. First operand 56 states and 101 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:43,327 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-07-13 19:57:43,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:57:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:57:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:43,328 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:57:43,328 INFO L226 Difference]: Without dead ends: 110 [2021-07-13 19:57:43,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-07-13 19:57:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2021-07-13 19:57:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.875) internal successors, (120), 64 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 120 transitions. [2021-07-13 19:57:43,331 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 120 transitions. Word has length 19 [2021-07-13 19:57:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:43,332 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 120 transitions. [2021-07-13 19:57:43,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 120 transitions. [2021-07-13 19:57:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:57:43,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:43,332 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:43,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:43,549 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash -458991931, now seen corresponding path program 4 times [2021-07-13 19:57:43,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:43,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483015196] [2021-07-13 19:57:43,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:43,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:43,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483015196] [2021-07-13 19:57:43,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483015196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:43,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331113016] [2021-07-13 19:57:43,632 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:43,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:43,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:43,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:57:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:43,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:43,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331113016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:43,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:43,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:57:43,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58461005] [2021-07-13 19:57:43,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:57:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:43,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:57:43,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:57:43,828 INFO L87 Difference]: Start difference. First operand 65 states and 120 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:44,185 INFO L93 Difference]: Finished difference Result 106 states and 184 transitions. [2021-07-13 19:57:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:57:44,186 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:57:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:44,186 INFO L225 Difference]: With dead ends: 106 [2021-07-13 19:57:44,186 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:57:44,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:57:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-07-13 19:57:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.8636363636363635) internal successors, (123), 66 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2021-07-13 19:57:44,189 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 19 [2021-07-13 19:57:44,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:44,189 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2021-07-13 19:57:44,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,190 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2021-07-13 19:57:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:57:44,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:44,190 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:44,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:57:44,409 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2036952865, now seen corresponding path program 5 times [2021-07-13 19:57:44,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:44,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344649453] [2021-07-13 19:57:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:44,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:44,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:44,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344649453] [2021-07-13 19:57:44,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344649453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:44,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988554028] [2021-07-13 19:57:44,487 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:44,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:44,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:44,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:57:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:44,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988554028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:44,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:44,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:57:44,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418783230] [2021-07-13 19:57:44,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:57:44,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:44,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:57:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:57:44,704 INFO L87 Difference]: Start difference. First operand 67 states and 123 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:44,850 INFO L93 Difference]: Finished difference Result 95 states and 164 transitions. [2021-07-13 19:57:44,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:57:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:57:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:44,851 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:57:44,851 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:57:44,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:57:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:57:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2021-07-13 19:57:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8571428571428572) internal successors, (117), 63 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 117 transitions. [2021-07-13 19:57:44,854 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 117 transitions. Word has length 19 [2021-07-13 19:57:44,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:44,854 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 117 transitions. [2021-07-13 19:57:44,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 117 transitions. [2021-07-13 19:57:44,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:57:44,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:44,855 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:45,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:45,070 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -900767593, now seen corresponding path program 6 times [2021-07-13 19:57:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:45,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108554902] [2021-07-13 19:57:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108554902] [2021-07-13 19:57:45,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108554902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764405136] [2021-07-13 19:57:45,159 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:45,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:45,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:45,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:57:45,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764405136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:45,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:57:45,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689751607] [2021-07-13 19:57:45,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:57:45,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:45,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:57:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:57:45,370 INFO L87 Difference]: Start difference. First operand 64 states and 117 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:45,473 INFO L93 Difference]: Finished difference Result 86 states and 145 transitions. [2021-07-13 19:57:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:57:45,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:57:45,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:45,474 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:57:45,474 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:57:45,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:57:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-07-13 19:57:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.8275862068965518) internal successors, (106), 58 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2021-07-13 19:57:45,477 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 19 [2021-07-13 19:57:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:45,477 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2021-07-13 19:57:45,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2021-07-13 19:57:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:57:45,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:45,478 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:45,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:45,695 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:45,695 INFO L82 PathProgramCache]: Analyzing trace with hash -250698623, now seen corresponding path program 7 times [2021-07-13 19:57:45,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:45,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474297530] [2021-07-13 19:57:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474297530] [2021-07-13 19:57:45,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474297530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168507348] [2021-07-13 19:57:45,774 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:45,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:57:45,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168507348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:45,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:57:45,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34914474] [2021-07-13 19:57:45,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:57:45,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:45,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:57:45,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:57:45,994 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:46,121 INFO L93 Difference]: Finished difference Result 74 states and 129 transitions. [2021-07-13 19:57:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:57:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:57:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:46,122 INFO L225 Difference]: With dead ends: 74 [2021-07-13 19:57:46,122 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 19:57:46,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 243.9ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 19:57:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2021-07-13 19:57:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 100 transitions. [2021-07-13 19:57:46,124 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 100 transitions. Word has length 19 [2021-07-13 19:57:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:46,124 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 100 transitions. [2021-07-13 19:57:46,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 100 transitions. [2021-07-13 19:57:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:46,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:46,125 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:46,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:57:46,341 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:46,342 INFO L82 PathProgramCache]: Analyzing trace with hash 798154329, now seen corresponding path program 8 times [2021-07-13 19:57:46,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:46,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257522693] [2021-07-13 19:57:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:46,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:46,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257522693] [2021-07-13 19:57:46,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257522693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:46,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072777768] [2021-07-13 19:57:46,428 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:46,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:46,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:46,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:57:46,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:46,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072777768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:46,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:46,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 19:57:46,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615129312] [2021-07-13 19:57:46,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:46,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:46,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:46,654 INFO L87 Difference]: Start difference. First operand 56 states and 100 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:47,207 INFO L93 Difference]: Finished difference Result 107 states and 190 transitions. [2021-07-13 19:57:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:47,208 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:57:47,208 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:57:47,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=271, Invalid=1289, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:57:47,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:57:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-07-13 19:57:47,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 87 transitions. [2021-07-13 19:57:47,210 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 87 transitions. Word has length 21 [2021-07-13 19:57:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:47,210 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 87 transitions. [2021-07-13 19:57:47,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 87 transitions. [2021-07-13 19:57:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:47,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:47,211 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:47,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:57:47,427 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:47,428 INFO L82 PathProgramCache]: Analyzing trace with hash -466773531, now seen corresponding path program 9 times [2021-07-13 19:57:47,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:47,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687654119] [2021-07-13 19:57:47,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:47,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:47,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687654119] [2021-07-13 19:57:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687654119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:47,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161381025] [2021-07-13 19:57:47,510 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:47,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:57:47,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:47,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:57:47,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:47,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161381025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:47,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:47,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 19:57:47,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245852191] [2021-07-13 19:57:47,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:47,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:47,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:47,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:47,717 INFO L87 Difference]: Start difference. First operand 51 states and 87 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:48,316 INFO L93 Difference]: Finished difference Result 85 states and 141 transitions. [2021-07-13 19:57:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:48,319 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:57:48,319 INFO L226 Difference]: Without dead ends: 56 [2021-07-13 19:57:48,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 661.1ms TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:57:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-13 19:57:48,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-07-13 19:57:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 47 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 81 transitions. [2021-07-13 19:57:48,322 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 81 transitions. Word has length 21 [2021-07-13 19:57:48,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:48,322 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 81 transitions. [2021-07-13 19:57:48,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 81 transitions. [2021-07-13 19:57:48,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:48,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:48,323 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:48,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:57:48,537 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 669411741, now seen corresponding path program 10 times [2021-07-13 19:57:48,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:48,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391138359] [2021-07-13 19:57:48,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:48,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391138359] [2021-07-13 19:57:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391138359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815118233] [2021-07-13 19:57:48,661 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:48,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:48,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:48,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:57:48,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:48,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815118233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:48,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:48,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 19:57:48,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388133706] [2021-07-13 19:57:48,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:48,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:48,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:48,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:48,873 INFO L87 Difference]: Start difference. First operand 48 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:49,802 INFO L93 Difference]: Finished difference Result 90 states and 147 transitions. [2021-07-13 19:57:49,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:57:49,802 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:49,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:49,802 INFO L225 Difference]: With dead ends: 90 [2021-07-13 19:57:49,802 INFO L226 Difference]: Without dead ends: 70 [2021-07-13 19:57:49,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 963.4ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:57:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-07-13 19:57:49,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2021-07-13 19:57:49,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2021-07-13 19:57:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-07-13 19:57:49,804 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-07-13 19:57:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:49,804 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-07-13 19:57:49,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-07-13 19:57:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:49,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:49,805 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:50,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:50,021 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:50,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:50,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1319480711, now seen corresponding path program 11 times [2021-07-13 19:57:50,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:50,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604647857] [2021-07-13 19:57:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:50,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:50,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604647857] [2021-07-13 19:57:50,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604647857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:50,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326542412] [2021-07-13 19:57:50,109 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:50,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:57:50,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:50,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326542412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:50,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:50,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-13 19:57:50,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450881420] [2021-07-13 19:57:50,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:57:50,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:57:50,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:57:50,373 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:51,304 INFO L93 Difference]: Finished difference Result 79 states and 133 transitions. [2021-07-13 19:57:51,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:57:51,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:51,305 INFO L225 Difference]: With dead ends: 79 [2021-07-13 19:57:51,305 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:57:51,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 915.0ms TimeCoverageRelationStatistics Valid=441, Invalid=2109, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:57:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:57:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2021-07-13 19:57:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 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) [2021-07-13 19:57:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 75 transitions. [2021-07-13 19:57:51,307 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 75 transitions. Word has length 21 [2021-07-13 19:57:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:51,307 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 75 transitions. [2021-07-13 19:57:51,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 75 transitions. [2021-07-13 19:57:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:51,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:51,308 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:51,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:57:51,517 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:51,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1793458263, now seen corresponding path program 12 times [2021-07-13 19:57:51,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:51,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751239468] [2021-07-13 19:57:51,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:51,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:51,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751239468] [2021-07-13 19:57:51,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751239468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:51,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264024164] [2021-07-13 19:57:51,620 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:51,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:57:51,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:51,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:57:51,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:51,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264024164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:51,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:51,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:57:51,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438229586] [2021-07-13 19:57:51,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:51,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:51,863 INFO L87 Difference]: Start difference. First operand 45 states and 75 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:52,372 INFO L93 Difference]: Finished difference Result 107 states and 173 transitions. [2021-07-13 19:57:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:52,372 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:52,373 INFO L225 Difference]: With dead ends: 107 [2021-07-13 19:57:52,373 INFO L226 Difference]: Without dead ends: 93 [2021-07-13 19:57:52,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 606.0ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:57:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-13 19:57:52,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 49. [2021-07-13 19:57:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 87 transitions. [2021-07-13 19:57:52,375 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 87 transitions. Word has length 21 [2021-07-13 19:57:52,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:52,375 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 87 transitions. [2021-07-13 19:57:52,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:52,375 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 87 transitions. [2021-07-13 19:57:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:52,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:52,375 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:52,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:57:52,589 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1615710753, now seen corresponding path program 13 times [2021-07-13 19:57:52,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:52,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125215358] [2021-07-13 19:57:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:52,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:52,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:52,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125215358] [2021-07-13 19:57:52,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125215358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:52,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270225457] [2021-07-13 19:57:52,690 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:57:52,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:52,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270225457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:52,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:52,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:57:52,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253412286] [2021-07-13 19:57:52,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:52,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:52,940 INFO L87 Difference]: Start difference. First operand 49 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:53,409 INFO L93 Difference]: Finished difference Result 114 states and 189 transitions. [2021-07-13 19:57:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:53,410 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:57:53,410 INFO L226 Difference]: Without dead ends: 100 [2021-07-13 19:57:53,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:57:53,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-13 19:57:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 50. [2021-07-13 19:57:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.816326530612245) internal successors, (89), 49 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2021-07-13 19:57:53,412 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 21 [2021-07-13 19:57:53,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:53,413 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2021-07-13 19:57:53,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,413 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2021-07-13 19:57:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:53,413 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:53,413 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:53,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:53,625 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 603018221, now seen corresponding path program 14 times [2021-07-13 19:57:53,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:53,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838033568] [2021-07-13 19:57:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:53,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838033568] [2021-07-13 19:57:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838033568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825076321] [2021-07-13 19:57:53,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:53,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:53,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:53,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:57:53,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:53,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825076321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:53,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:53,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:57:53,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627748485] [2021-07-13 19:57:53,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:53,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:53,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:53,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:53,968 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:54,678 INFO L93 Difference]: Finished difference Result 182 states and 297 transitions. [2021-07-13 19:57:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:57:54,679 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:54,679 INFO L225 Difference]: With dead ends: 182 [2021-07-13 19:57:54,679 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:57:54,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=338, Invalid=1732, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:57:54,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:57:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 55. [2021-07-13 19:57:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 104 transitions. [2021-07-13 19:57:54,682 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 104 transitions. Word has length 21 [2021-07-13 19:57:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:54,682 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 104 transitions. [2021-07-13 19:57:54,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 104 transitions. [2021-07-13 19:57:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:54,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:54,683 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:54,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:54,900 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:54,900 INFO L82 PathProgramCache]: Analyzing trace with hash 67788419, now seen corresponding path program 15 times [2021-07-13 19:57:54,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:54,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763381319] [2021-07-13 19:57:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:54,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:54,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763381319] [2021-07-13 19:57:54,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763381319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:54,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834725895] [2021-07-13 19:57:54,991 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:55,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:57:55,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:57:55,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:55,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834725895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:55,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:55,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:57:55,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048994432] [2021-07-13 19:57:55,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:55,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:55,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:55,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:55,223 INFO L87 Difference]: Start difference. First operand 55 states and 104 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:55,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:55,825 INFO L93 Difference]: Finished difference Result 143 states and 238 transitions. [2021-07-13 19:57:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:55,825 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:55,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:55,826 INFO L225 Difference]: With dead ends: 143 [2021-07-13 19:57:55,826 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:57:55,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:57:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:57:55,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 47. [2021-07-13 19:57:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 83 transitions. [2021-07-13 19:57:55,828 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 83 transitions. Word has length 21 [2021-07-13 19:57:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:55,828 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 83 transitions. [2021-07-13 19:57:55,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 83 transitions. [2021-07-13 19:57:55,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:55,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:55,829 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:56,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:56,046 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:56,046 INFO L82 PathProgramCache]: Analyzing trace with hash 770739301, now seen corresponding path program 16 times [2021-07-13 19:57:56,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:56,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923455309] [2021-07-13 19:57:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:56,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923455309] [2021-07-13 19:57:56,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923455309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:56,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270817172] [2021-07-13 19:57:56,133 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:56,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:56,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:57:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:56,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270817172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:56,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:56,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:57:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984671690] [2021-07-13 19:57:56,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:56,360 INFO L87 Difference]: Start difference. First operand 47 states and 83 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:56,748 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-07-13 19:57:56,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:56,749 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:57:56,749 INFO L226 Difference]: Without dead ends: 83 [2021-07-13 19:57:56,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:57:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-07-13 19:57:56,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-07-13 19:57:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.8387096774193548) internal successors, (114), 62 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 114 transitions. [2021-07-13 19:57:56,751 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 114 transitions. Word has length 21 [2021-07-13 19:57:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:56,751 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 114 transitions. [2021-07-13 19:57:56,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 114 transitions. [2021-07-13 19:57:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:56,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:56,752 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:56,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:57:56,968 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash -241953231, now seen corresponding path program 17 times [2021-07-13 19:57:56,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:56,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106097164] [2021-07-13 19:57:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:57,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106097164] [2021-07-13 19:57:57,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106097164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365601686] [2021-07-13 19:57:57,059 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:57,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:57:57,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:57,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:57:57,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365601686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:57,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:57:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357792777] [2021-07-13 19:57:57,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:57,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:57,303 INFO L87 Difference]: Start difference. First operand 63 states and 114 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:57,907 INFO L93 Difference]: Finished difference Result 133 states and 227 transitions. [2021-07-13 19:57:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:57:57,907 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:57,908 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:57:57,908 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:57:57,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:57:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:57:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 67. [2021-07-13 19:57:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9090909090909092) internal successors, (126), 66 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 126 transitions. [2021-07-13 19:57:57,910 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 126 transitions. Word has length 21 [2021-07-13 19:57:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:57,910 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 126 transitions. [2021-07-13 19:57:57,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 126 transitions. [2021-07-13 19:57:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:57:57,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:57,911 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:58,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:57:58,118 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:58,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:58,120 INFO L82 PathProgramCache]: Analyzing trace with hash -777183033, now seen corresponding path program 18 times [2021-07-13 19:57:58,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:58,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565229548] [2021-07-13 19:57:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:58,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:58,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:58,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565229548] [2021-07-13 19:57:58,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565229548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:58,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123213325] [2021-07-13 19:57:58,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:58,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:57:58,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:58,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:57:58,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:58,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123213325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:58,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:58,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:57:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697689523] [2021-07-13 19:57:58,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:58,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:58,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:58,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:58,471 INFO L87 Difference]: Start difference. First operand 67 states and 126 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:58,939 INFO L93 Difference]: Finished difference Result 111 states and 193 transitions. [2021-07-13 19:57:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:57:58,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:57:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:58,940 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:57:58,940 INFO L226 Difference]: Without dead ends: 73 [2021-07-13 19:57:58,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:57:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-07-13 19:57:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 57. [2021-07-13 19:57:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 99 transitions. [2021-07-13 19:57:58,942 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 99 transitions. Word has length 21 [2021-07-13 19:57:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:58,942 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 99 transitions. [2021-07-13 19:57:58,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 99 transitions. [2021-07-13 19:57:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:57:58,943 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:58,943 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:59,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:59,158 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2078233109, now seen corresponding path program 19 times [2021-07-13 19:57:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:59,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397312972] [2021-07-13 19:57:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:57:59,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:59,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397312972] [2021-07-13 19:57:59,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397312972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:59,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077563450] [2021-07-13 19:57:59,253 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:59,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:57:59,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:59,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077563450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:59,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:59,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 19:57:59,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962393303] [2021-07-13 19:57:59,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:57:59,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:59,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:57:59,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:57:59,472 INFO L87 Difference]: Start difference. First operand 57 states and 99 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:59,940 INFO L93 Difference]: Finished difference Result 109 states and 188 transitions. [2021-07-13 19:57:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:57:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:59,941 INFO L225 Difference]: With dead ends: 109 [2021-07-13 19:57:59,941 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:57:59,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:57:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:57:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 61. [2021-07-13 19:57:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 60 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 107 transitions. [2021-07-13 19:57:59,943 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 107 transitions. Word has length 23 [2021-07-13 19:57:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:59,943 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 107 transitions. [2021-07-13 19:57:59,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,944 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 107 transitions. [2021-07-13 19:57:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:57:59,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:59,944 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:00,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:58:00,159 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1330935907, now seen corresponding path program 20 times [2021-07-13 19:58:00,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:00,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979159373] [2021-07-13 19:58:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:00,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:00,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979159373] [2021-07-13 19:58:00,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979159373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:00,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894589631] [2021-07-13 19:58:00,245 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:00,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:00,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:58:00,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:00,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894589631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:00,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:00,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 19:58:00,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267940627] [2021-07-13 19:58:00,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:00,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:00,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:00,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:00,489 INFO L87 Difference]: Start difference. First operand 61 states and 107 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:01,082 INFO L93 Difference]: Finished difference Result 120 states and 210 transitions. [2021-07-13 19:58:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:58:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:01,083 INFO L225 Difference]: With dead ends: 120 [2021-07-13 19:58:01,083 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:58:01,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 611.8ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:58:01,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:58:01,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 61. [2021-07-13 19:58:01,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:01,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 108 transitions. [2021-07-13 19:58:01,087 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 108 transitions. Word has length 23 [2021-07-13 19:58:01,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:01,087 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 108 transitions. [2021-07-13 19:58:01,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:01,087 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 108 transitions. [2021-07-13 19:58:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:58:01,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:01,088 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:01,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:01,301 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:01,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:01,301 INFO L82 PathProgramCache]: Analyzing trace with hash 318243375, now seen corresponding path program 21 times [2021-07-13 19:58:01,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:01,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485449196] [2021-07-13 19:58:01,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:01,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:01,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485449196] [2021-07-13 19:58:01,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485449196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:01,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691476187] [2021-07-13 19:58:01,384 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:58:01,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:58:01,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:01,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:58:01,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:01,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691476187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:01,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:01,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 19:58:01,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470329783] [2021-07-13 19:58:01,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:01,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:01,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:01,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:01,599 INFO L87 Difference]: Start difference. First operand 61 states and 108 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:02,270 INFO L93 Difference]: Finished difference Result 116 states and 202 transitions. [2021-07-13 19:58:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:58:02,270 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:58:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:02,270 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:58:02,270 INFO L226 Difference]: Without dead ends: 102 [2021-07-13 19:58:02,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 718.5ms TimeCoverageRelationStatistics Valid=406, Invalid=2246, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:58:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-07-13 19:58:02,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-07-13 19:58:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 58 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-07-13 19:58:02,274 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 23 [2021-07-13 19:58:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:02,274 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-07-13 19:58:02,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-07-13 19:58:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:58:02,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:02,274 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:02,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:58:02,490 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash -216986427, now seen corresponding path program 22 times [2021-07-13 19:58:02,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:02,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912106195] [2021-07-13 19:58:02,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:02,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:02,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912106195] [2021-07-13 19:58:02,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912106195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:02,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515626995] [2021-07-13 19:58:02,600 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:02,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:02,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:58:02,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:02,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515626995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:02,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:02,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-07-13 19:58:02,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742494945] [2021-07-13 19:58:02,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:58:02,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:02,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:58:02,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:58:02,807 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:03,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:03,402 INFO L93 Difference]: Finished difference Result 92 states and 163 transitions. [2021-07-13 19:58:03,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:03,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:58:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:03,402 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:58:03,402 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 19:58:03,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=260, Invalid=1380, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:58:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 19:58:03,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 19:58:03,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 19:58:03,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2021-07-13 19:58:03,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:03,403 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 19:58:03,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:03,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 19:58:03,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:58:03,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:58:03,629 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:58:03,632 INFO L202 PluginConnector]: Adding new model figure1-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:58:03 BasicIcfg [2021-07-13 19:58:03,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:58:03,632 INFO L168 Benchmark]: Toolchain (without parser) took 27493.07 ms. Allocated memory was 232.8 MB in the beginning and 456.1 MB in the end (delta: 223.3 MB). Free memory was 212.0 MB in the beginning and 254.9 MB in the end (delta: -42.9 MB). Peak memory consumption was 181.2 MB. Max. memory is 8.0 GB. [2021-07-13 19:58:03,632 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 232.8 MB. Free memory is still 213.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:58:03,632 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 232.8 MB. Free memory was 211.9 MB in the beginning and 210.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:58:03,632 INFO L168 Benchmark]: Boogie Preprocessor took 11.48 ms. Allocated memory is still 232.8 MB. Free memory was 210.5 MB in the beginning and 209.5 MB in the end (delta: 972.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:58:03,632 INFO L168 Benchmark]: RCFGBuilder took 188.55 ms. Allocated memory is still 232.8 MB. Free memory was 209.5 MB in the beginning and 198.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-07-13 19:58:03,632 INFO L168 Benchmark]: TraceAbstraction took 27270.23 ms. Allocated memory was 232.8 MB in the beginning and 456.1 MB in the end (delta: 223.3 MB). Free memory was 197.7 MB in the beginning and 254.9 MB in the end (delta: -57.2 MB). Peak memory consumption was 166.6 MB. Max. memory is 8.0 GB. [2021-07-13 19:58:03,632 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 0.08 ms. Allocated memory is still 232.8 MB. Free memory is still 213.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 232.8 MB. Free memory was 211.9 MB in the beginning and 210.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.48 ms. Allocated memory is still 232.8 MB. Free memory was 210.5 MB in the beginning and 209.5 MB in the end (delta: 972.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 188.55 ms. Allocated memory is still 232.8 MB. Free memory was 209.5 MB in the beginning and 198.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 27270.23 ms. Allocated memory was 232.8 MB in the beginning and 456.1 MB in the end (delta: 223.3 MB). Free memory was 197.7 MB in the beginning and 254.9 MB in the end (delta: -57.2 MB). Peak memory consumption was 166.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 51]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 27209.7ms, OverallIterations: 28, TraceHistogramMax: 3, EmptinessCheckTime: 15.0ms, AutomataDifference: 12370.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 546 SDtfs, 2891 SDslu, 3840 SDs, 0 SdLazy, 7124 SolverSat, 424 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2820.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1218 GetRequests, 289 SyntacticMatches, 26 SemanticMatches, 903 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8019 ImplicationChecksByTransitivity, 14165.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=10, InterpolantAutomatonStates: 642, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 115.1ms AutomataMinimizationTime, 28 MinimizatonAttempts, 848 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 62.7ms SsaConstructionTime, 241.8ms SatisfiabilityAnalysisTime, 7871.8ms InterpolantComputationTime, 1078 NumberOfCodeBlocks, 1078 NumberOfCodeBlocksAsserted, 82 NumberOfCheckSat, 1024 ConstructedInterpolants, 0 QuantifiedInterpolants, 12797 SizeOfPredicates, 130 NumberOfNonLiveVariables, 1085 ConjunctsInSsa, 496 ConjunctsInUnsatCore, 54 InterpolantComputations, 2 PerfectInterpolantSequences, 14/226 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...